Lead, Zirconium, Titanium Or Compound Thereof Containing Patents (Class 252/62.9PZ)
  • Patent number: 9039921
    Abstract: A method to produce low-temperature sinterable powders which are then subsequently used to fabricate freestanding piezoelectric films with very large electric-field-enhanced piezoelectric response is provided. The ?d31 coefficient for PMN-PT layers can be as high as 2000 pm/V, larger than that of commercial single crystalline PMN-PT bulk materials, at 10 kV/cm (or 20 V over the 20-micron film thickness). In contrast to single crystals, the polycrystalline freestanding films are easy to fabricate and can be made into any size. The films are also easily miniaturized. The method can be applied to nearly any piezoelectric material.
    Type: Grant
    Filed: May 20, 2010
    Date of Patent: May 26, 2015
    Assignee: Drexel University
    Inventors: Wei-Heng Shih, Hongyu Luo, Christian Martorano, Wan Y. Shih
  • Publication number: 20150141834
    Abstract: The present invention is a piezoelectric composition and a piezoelectric element using the piezoelectric composition, the composition being characterized by: having a Perovskite structure represented by general formula ABO3; being represented by composition formula x(Bi0.5K0.5)TiO3-yBi(Mg0.5Ti0.5)O3-zBiFeO3, x+y+z=1 in the composition formula above; and in a triangular coordinate using x, y and z in the composition formula above, having a composition represented by a region which is surrounded by a pentagon ABCDE with apexes of point A (1, 0, 0), point B (0.7, 0.3, 0), point C (0.1, 0.3, 0.6), point D (0.1, 0.1, 0.8) and point E (0.2, 0, 0.8) and which does not include the line segment AE that connects point A (1, 0, 0) and point E (0.2, 0, 0.8).
    Type: Application
    Filed: May 16, 2013
    Publication date: May 21, 2015
    Applicant: KONICA MINOLTA, INC.
    Inventors: Hisashi Minemoto, Satoshi Wada
  • Publication number: 20150137667
    Abstract: The present disclosure provides a piezoelectricityity ceramic material. The piezoelectricityity ceramic material includes main components that are represented by a general chemical formula of Pb(Mn1/3Sb2/3)xZryTizO3+awt % WO3 and satisfy the following conditions: 0.02 ?x?0.1, 0.4?y?0.6, 0.4?z?0.6, and 0.5?a?3. Compared to related art, the products provided by the present disclosure have the following advantages: higher temperature stability, simpler production process, shorter production cycle, and convenient for mass production.
    Type: Application
    Filed: November 12, 2014
    Publication date: May 21, 2015
    Applicant: AAC TECHNOLOGIES PTE. LTD.
    Inventor: Shaohua Su
  • Publication number: 20150134061
    Abstract: There is a need for methods that can produce piezoelectric composites having suitable physical characteristics and also optimized electrical stimulatory properties. The present application provides piezoelectric composites, including tissue-stimulating composites, as well as methods of making such composites, that meet these needs. In embodiments, methods of making a spinal implant are provided. The methods suitably comprise preparing a thermoset, thermoplastic or thermoset/thermoplastic, or copolymer polymerizable matrix, dispersing a plurality of piezoelectric particles in the polymerizable matrix to generate dispersion, shaping the dispersion, inducing an electric polarization in the piezoelectric particles in the shaped dispersion, wherein at least 40% of the piezoelectric particles form chains.
    Type: Application
    Filed: June 11, 2013
    Publication date: May 14, 2015
    Inventors: Elizabeth Annamaria Friis, John Patrick Domann
  • Publication number: 20150129792
    Abstract: The present invention aims to provide an excellent piezoelectric composition and an excellent piezoelectric element if the piezoelectric properties especially a high spontaneous polarization and a sufficiently high resistivity, the low pollution, the environment and the ecology are considered. In the piezoelectric composition, the main component contains the substance represented by the following formula with a perovskite-typed structure, (Bi(0.5x+y+z)Na0.5x)m(Tix+0.5yMg0.5yAlz)O3. Wherein, 0.01?x?0.8, 0.2?y?0.8, 0.01?z?0.6, 0.75?m?1.
    Type: Application
    Filed: November 7, 2014
    Publication date: May 14, 2015
    Inventors: Taku MASAI, Keisuke TERANISHI, Masahito FURUKAWA
  • Publication number: 20150132529
    Abstract: A piezoelectric ceramic has a primary phase constituted by ceramic grains of perovskite crystal structure containing Pb, Nb, Zn, Ti, and Zr, and a secondary phase constituted by ZnO grains present sporadically in the primary phase. The piezoelectric ceramic of high kr and high specific dielectric constant can be sintered at low temperature and exhibit minimal characteristics variations.
    Type: Application
    Filed: October 23, 2014
    Publication date: May 14, 2015
    Inventors: Gouki WATANABE, Takayuki GOTO, Keiichi HATANO, Sumiaki KISHIMOTO, Yutaka DOSHIDA
  • Publication number: 20150102253
    Abstract: The present invention relates to a piezoelectric material for low sintering and more particularly, to piezoelectric materials for low sintering having a composition formula of Pb(Zr, Ti)O3—Pb(Ni, Nb)O3 (hereinafter referring to as ‘PZT-PNN’). The PZT-PNN piezoelectric material according to the present invention shows excellent piezoelectric properties compared to the convention piezoelectric materials even at a low sintering temperature of 950° C. or lower. It thus allows reducing manufacturing cost by using relatively lower-cost electrode materials than Pd or Pt and increasing reliability of operation temperature through improving the glass transition temperature.
    Type: Application
    Filed: January 8, 2014
    Publication date: April 16, 2015
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Boum-Seock Kim, Hui-Sun Park, Jung-Wook Seo, Hong-Yeon Cho
  • Patent number: 9005465
    Abstract: Methods for forming lead zirconate titanate (PZT) nanoparticles are provided. The PZT nanoparticles are formed from a precursor solution, comprising a source of lead, a source of titanium, a source of zirconium, and a mineralizer, that undergoes a hydrothermal process. The size and morphology of the PZT nanoparticles are controlled, in part, by the heating schedule used during the hydrothermal process.
    Type: Grant
    Filed: August 17, 2011
    Date of Patent: April 14, 2015
    Assignee: University of Washington through its Center for Commercialization
    Inventors: I-Yeu Shen, Guozhong Cao, Hsien-Lin Huang
  • Publication number: 20150091417
    Abstract: A piezoelectric ceramic contains as a main component an oxide which is represented by the general formula: sA1B1O3-t(Bi.A2)TiO3-(1-s-t)BaMO3 (where A1 is at least one element selected from among alkali metals; B1 is at least one element selected from among transition metal elements and contains Nb; A2 is at least one element selected from among alkali metals; and M is at least one element selected from the 4A group and contains Zr). In the general formula, s and t satisfy 0.905?s?0.918, 0.005?t?0.02, and a piezoelectric constant d33(25) at 25° C. and a piezoelectric constant d33(200) at 200° C. satisfy the relationship (d33(25)?d33(200)/d33(25)?0.13.
    Type: Application
    Filed: September 25, 2014
    Publication date: April 2, 2015
    Applicant: TOYAMA Prefecture
    Inventors: Tomoaki KARAKI, Tsunehiro KATAYAMA
  • Publication number: 20150077474
    Abstract: A piezoelectric thin film which is of a perovskite type having a tetragonal crystal structure, the tetragonal crystal having a degree of (100) orientation of 80% or higher. The piezoelectric thin film is constituted of a lead lanthanum zirconate titanate (PLZT) which is a lead zirconate titanate (PZT) in which some of the lead has been replaced with lanthanum.
    Type: Application
    Filed: January 22, 2013
    Publication date: March 19, 2015
    Inventor: Kenji Mawatari
  • Publication number: 20150076391
    Abstract: The application is directed to piezoelectric single crystals having shear piezoelectric coefficients with enhanced temperature and/or electric field stability. These piezoelectric single crystal may be used, among other things, for vibration sensors as well as low frequency, compact sonar transducers with improved and/or enhanced performance.
    Type: Application
    Filed: November 24, 2014
    Publication date: March 19, 2015
    Inventors: Wesley S. HACKENBERGER, Jun LUO, Shujun ZHANG, Fei LI, Thomas R. SHROUT, Kevin A. SNOOK, Raffi SAHUL
  • Publication number: 20150053884
    Abstract: The present invention provides a lead-free piezoelectric material having a high piezoelectric constant and a high mechanical quality factor in a wide operating temperature range. The piezoelectric material includes a perovskite-type metal oxide represented by Formula (1): (Ba1-xCax)a(Ti1-yZry)O3 (1.00?a?1.01, 0.125?x<0.155, and 0.041?y?0.074) as a main component. The metal oxide contains Mn in a content of 0.12 parts by weight or more and 0.40 parts by weight or less based on 100 parts by weight of the metal oxide on a metal basis.
    Type: Application
    Filed: March 7, 2013
    Publication date: February 26, 2015
    Inventors: Takanori Matsuda, Tatsuo Furuta, Yasushi Shimizu, Shinya Koyama, Akira Uebayashi, Hiroshi Saito, Makoto Kubota, Kenichi Akashi, Jumpei Hayashi
  • Publication number: 20150053885
    Abstract: A piezoelectric ceramic contains a main component, Mn as a first auxiliary component, and a second auxiliary component containing at least one element selected from the group consisting of Cu, B, and Si. The main component contains a perovskite metal oxide having the following general formula (1): (Ba1-xCax)a(Ti1-yZry)O3(0.100?x?0.145,0.010?y?0.039)??(1) The amount b (mol) of Mn per mole of the metal oxide is in the range of 0.0048?b?0.0400, the second auxiliary component content on a metal basis is 0.001 parts by weight or more and 4.000 parts by weight or less per 100 parts by weight of the metal oxide, and the value a of the general formula (1) is in the range of 0.9925+b?a?1.0025+b.
    Type: Application
    Filed: March 21, 2013
    Publication date: February 26, 2015
    Applicant: Canon Kabushiki Kaisha
    Inventors: Hiroshi Saito, Shunsuke Murakami, Miki Ueda, Hidenori Tanaka, Takanori Matsuda, Takayuki Watanabe, Makoto Kubota
  • Publication number: 20150048717
    Abstract: A piezoelectric glass ceramic represented by the formula (M1Ox)-(M2Oy)—SiO2 wherein M1 is one or more metals and/or metalloids, M2 is one or more metals and/or metalloids, x is a value equal to the valence of M1, and y is a value equal to the valence of M2. The piezoelectric glass ceramic has a total alkali metal concentration of less than about 1000 parts per million by weight (ppmw). A process of preparing a piezoelectric glass ceramic and a piezoelectric glass ceramic body prepared therefrom.
    Type: Application
    Filed: August 16, 2013
    Publication date: February 19, 2015
    Applicant: SCHOTT Corporation
    Inventor: Mark J. DAVIS
  • Patent number: 8956547
    Abstract: A piezoelectric compound having no occurrence of segregation or uneven structures as well as a piezoelectric element having excellent piezoelectric properties. The piezoelectric composition includes a main component that is a perovskite-typed oxide represented by formula of ABO3, wherein, one site includes Bi, Na, and another site includes Ti, and part of the Ti is substituted by transition metal element Me (Me is at least one element selected from the group consisting of Mn, Cr, Fe and Co), according to the conversion of BiMeO3, the content ratio of Bi and the transition metal element Me accounts for 6˜43 mol % relative to the whole perovskite-typed oxides as the main component.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: February 17, 2015
    Assignee: TDK Corporation
    Inventors: Taku Masai, Masahito Furukawa
  • Publication number: 20150041701
    Abstract: Provided is a lead-free piezoelectric material having satisfactory piezoelectric constant and mechanical quality factor in a device driving temperature range (?30° C. to 50° C.) The piezoelectric material includes a main component containing a perovskite-type metal oxide represented by Formula 1, a first auxiliary component composed of Mn, and a second auxiliary component composed of Bi or Bi and Li. The content of Mn is 0.040 parts by weight or more and 0.500 parts by weight or less based on 100 parts by weight of the metal oxide on a metal basis. The content of Bi is 0.042 parts by weight or more and 0.850 parts by weight or less and the content of Li is 0.028 parts by weight or less (including 0 parts by weight) based on 100 parts by weight of the metal oxide on a metal basis. (Ba1-xCax)a(Ti1-yZry)O3 . . . (1), wherein, 0.030?x<0.090, 0.030?y?0.080, and 0.9860?a?1.0200.
    Type: Application
    Filed: July 11, 2014
    Publication date: February 12, 2015
    Inventors: Shunsuke Murakami, Takanori Matsuda, Kanako Oshima, Jumpei Hayashi, Takayuki Watanabe, Hidenori Tanaka, Hiroshi Saito
  • Publication number: 20150028249
    Abstract: Provided is a lead-free piezoelectric ceramics having enhanced mechanical quality factor (Qm) and mechanical strength. The piezoelectric ceramics, includes at least a first crystal grain and a second crystal grain. The first crystal grain has an average equivalent circle diameter of 2 ?m or more and 30 ?m or less. The first crystal grain includes a perovskite-type metal oxide represented by the following general formula (1) as a main component, and the second crystal grain includes a perovskite-type metal oxide represented by the following general formula (2) as a main component: (1) xBaTiO3-yCaTiO3-zCaZrO3; and (2) x?BaTiO3-y?CaTiO3-z?CaZrO3, provided that x, y, z, x?, y?, and z? satisfy x+y+z=1, x?+y?+z?=1, 0?x??0.15, 0.85?y??1, 0?z?0.05, x>x?, 0<y<y?, and z>0.
    Type: Application
    Filed: March 26, 2013
    Publication date: January 29, 2015
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Mikio Shimada, Toshiaki Aiba, Toshihiro Ifuku, Takanori Matsuda, Makoto Kubota, Tatsuo Furuta, Jumpei Hayashi
  • Publication number: 20150015642
    Abstract: There is provided a piezoelectric material not containing any lead component, having stable piezoelectric characteristics in an operating temperature range, a high mechanical quality factor, and satisfactory piezoelectric characteristics. The piezoelectric material according to the present invention includes a main component containing a perovskite-type metal oxide that can be expressed using the following general formula (1), and subcomponents containing Mn, Li, and Bi. When the metal oxide is 100 parts by weight, the content of Mn on a metal basis is not less than 0.04 parts by weight and is not greater than 0.36 parts by weight, content ? of Li on a metal basis is equal to or less than 0.0012 parts by weight (including 0 parts by weight), and content ? of Bi on a metal basis is not less than 0.042 parts by weight and is not greater than 0.850 parts by weight (Ba1-xCax)a(Ti1-y-zZrySnz)O3??(1) (in the formula (1), 0.09?x?0.30, 0.025?y?0.085, 0?z?0.02, and 0.986?a?1.02).
    Type: Application
    Filed: July 10, 2014
    Publication date: January 15, 2015
    Inventors: Hidenori Tanaka, Takayuki Watanabe, Shunsuke Murakami, Tatsuo Furuta, Hisato Yabuta
  • Publication number: 20150015121
    Abstract: There is provided a piezoelectric material not containing any lead component, having stable piezoelectric characteristics in an operating temperature range, a high mechanical quality factor, and satisfactory piezoelectric characteristics. The piezoelectric material includes a main component containing a perovskite-type metal oxide that can be expressed using the following general formula (1), and subcomponents containing Mn, Li, and Bi. When the metal oxide is 100 parts by weight, the content of Mn on a metal basis is not less than 0.04 parts by weight and is not greater than 0.36 parts by weight, content ? of Li on a metal basis is not less than 0.0013 parts by weight and is not greater than 0.0280 parts by weight, and content ? of Bi on a metal basis is not less than 0.042 parts by weight and is not greater than 0.850 parts by weight (Ba1-xCax)a(Ti1-y-zZrySnz)O3??(1) (in the formula (1), 0.09?x?0.30, 0.074<y?0.085, 0?z?0.02, and 0.986?a?1.
    Type: Application
    Filed: July 10, 2014
    Publication date: January 15, 2015
    Inventors: Takayuki Watanabe, Hidenori Tanaka, Shunsuke Murakami, Tatsuo Furuta, Hisato Yabuta
  • Publication number: 20150015643
    Abstract: A piezoelectric material contains a main component containing a perovskite-type metal oxide having the formula (1); a first auxiliary component composed of Mn; and a second auxiliary component composed of Bi or Bi and Li, wherein the Mn content is 0.04 parts by weight or more and 0.400 parts by weight or less on a metal basis per 100 parts by weight of the metal oxide, the Bi content is 0.042 parts by weight or more and 0.850 parts by weight or less on a metal basis per 100 parts by weight of the metal oxide, and the Li content is 0.028 parts by weight or less (including 0 parts by weight) on a metal basis per 100 parts by weight of the metal oxide. (Ba1-xCax)a(Ti1-y-zSnyZrz)O3??(1) (wherein 0?x?0.080, 0.013?y?0.060, 0?z?0.040, and 0.986?a?1.020.
    Type: Application
    Filed: July 11, 2014
    Publication date: January 15, 2015
    Inventors: Kanako Oshima, Takayuki Watanabe, Shunsuke Murakami, Hidenori Tanaka, Jumpei Hayashi, Hiroshi Saito, Takanori Matsuda
  • Publication number: 20150002585
    Abstract: A piezoelectric material contains a first component that is a rhombohedral crystal that is configured to have a complex oxide with a perovskite structure and Curie temperature Tc1, a second component that is a crystal other than a rhombohedral crystal that is configured to have a complex oxide with the perovskite structure and Curie temperature Tc2, and a third component that is configured to have a complex oxide with the perovskite structure in which the component is formed as the same crystal system as the second component and Curie temperature Tc3, in which Tc1 is higher than Tc2, and Tc3 is equal to or higher than Tc1.
    Type: Application
    Filed: March 26, 2014
    Publication date: January 1, 2015
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Koji SUMI, Kazuya KITADA, Tomohiro SAKAI, Yasuaki HAMADA, Tetsuya ISSHIKI, Satoshi KIMURA, Akio ITO, Tsuneo HANDA
  • Publication number: 20150002584
    Abstract: A piezoelectric material contains a first component that is a rhombohedral crystal that is configured to have a complex oxide with a perovskite structure and Curie temperature Tc1 and a second component that is a crystal other than a rhombohedral crystal that is configured to have a complex oxide with the perovskite structure and Curie temperature Tc2, in which |Tc1?Tc2| is equal to or less than 50° C.
    Type: Application
    Filed: March 26, 2014
    Publication date: January 1, 2015
    Applicant: Seiko Epson Corporation
    Inventors: Koji SUMI, Kazuya KITADA, Tomohiro SAKAI, Yasuaki HAMADA, Tetsuya ISSHIKI, Satoshi KIMURA, Akio ITO, Tsuneo HANDA
  • Publication number: 20150002586
    Abstract: A piezoelectric material contains a first component that is a rhombohedral crystal and that is configured to have a complex oxide with a perovskite structure and Curie temperature Tc1, a second component that is a crystal other than a rhombohedral crystal and that is configured to have a complex oxide with a perovskite structure and Curie temperature e Tc2, and a third component that is a rhombohedral crystal and that is configured to have a complex oxide with a perovskite structure and Curie temperature Tc3 different from the first component, and in which Tc2 is higher than Tc1, Tc3 is equal to or higher than Tc2, and a value of (0.1×Tc1+0.9×Tc2) is equal to or lower than 280° C.
    Type: Application
    Filed: March 26, 2014
    Publication date: January 1, 2015
    Applicant: Seiko Epson Corporation
    Inventors: Koji SUMI, Kazuya KITADA, Tomohiro SAKAI, Yasuaki HAMADA, Tetsuya ISSHIKI, Satoshi KIMURA, Akio ITO, Tsuneo HANDA
  • Publication number: 20140374642
    Abstract: Methods for forming lead zirconate titanate (PZT) nanoparticles are provided. The PZT nanoparticles are formed from a precursor solution, comprising a source of lead, a source of titanium, a source of zirconium, and a mineraliser, that undergoes a hydro thermal process. The size and morphology of the PZT nanoparticles are controlled, in part, by the heating schedule used during the hydro thermal process.
    Type: Application
    Filed: August 17, 2012
    Publication date: December 25, 2014
    Applicant: University of Washington through its Center for Commercialization
    Inventors: I-Yeu Shen, Guozhong Cao, Hsien-Lin Huang
  • Publication number: 20140375174
    Abstract: Textured PMN-PZT fabricated by templated grain growth (TGG) method has a piezoelectric coefficient (d) of 3 to 5 times that of its random counterpart. By combining this TGG method with low-temperature co-firing ceramics (LTCC) techniques, co-fired multilayer textured piezoelectric ceramic materials with inner electrodes were produced at a temperature as low as 925° C., which silver could be used. Trilayer PMN-PZT ceramics prepared by this method show a strain increase of 2.5 times, a driving voltage decrease of 3 times, and an equivalent piezoelectric coefficient (d*) improvement of 10 to 15 times that of conventional random ceramic counterparts. Further, a co-fired magnetostrictive/piezoelectric/magnetostrictive laminate structure with silver inner electrode was also synthesized. The integration of textured piezoelectric microstructure with the cost-effective low-temperature co-fired layered structure achieves strong magnetoelectric coupling.
    Type: Application
    Filed: February 1, 2013
    Publication date: December 25, 2014
    Applicant: VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.
    Inventors: Yongke Yan, Shashank Priya
  • Publication number: 20140354738
    Abstract: Provided is a piezoelectric material having high Curie temperature, high insulation property, and high piezoelectric performance, the piezoelectric material including a perovskite-type metal oxide represented by the general formula (1): xBaTiO3-yBiFeO3-zBi(M0.5Ti0.5)O3, where M represents at least one kind of element selected from the group consisting of Mg, Ni, and Zn, x represents a value satisfying 0.25?x?0.75, y represents a value satisfying 0.15?y?0.73, and z represents a value satisfying 0.02?z?0.60, provided that x+y+z=1 is satisfied in which the perovskite-type metal oxide contains V, and content of the V is 0.0005 mol or larger and 0.0050 mol or smaller with respect to 1 mol of the perovskite-type metal oxide. In addition, provided are a piezoelectric element, a liquid discharge head, an ultrasonic motor, and a dust removing device, which use the piezoelectric material.
    Type: Application
    Filed: March 8, 2013
    Publication date: December 4, 2014
    Inventors: Hisato Yabuta, Takayuki Watanabe, Makoto Kubota, Jumpei Hayashi
  • Patent number: 8900475
    Abstract: A PZT-type piezoelectric ceramic material having a perovskite structure of the ABO3 type. The stoichiometric ratio of AB is 1:1, with the “A” component being Pb1-zSrz and the “B” component being (Mn1/3Sb2/3)x(ZryTi1-y)1-x. Z is between 0.02 and 0.03, x is between 0.03 and 0.07, and y is between 0.40 and 0.60. The material further comprises dopants, with the dopants comprising Ce, Cu, and Nb dopants, with each of the Ce, Cu, and Nb dopants being provided in an amount of up to 2 wt. %, with the combined amount of the Ce, Cu, and Nb2 dopants being between 1 wt. % and 4 wt. %. Methods for preparing the PZT ceramic materials by combining oxides of Pb, Sr, Mn, Sb, Zr, Ti, Nb, Cu, and Ce and calcining the combined oxides so as to produce a PZT composition of the stated formula are also disclosed.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: December 2, 2014
    Assignee: Piezotech, LLC
    Inventor: De Liufu
  • Patent number: 8894873
    Abstract: Provided is a Sr2-xCaxNaNb5O15 type piezoelectric ceramic composition wherein the inhibition of cracking and an improvement in the piezoelectric characteristics are attained by improving the composition uniformity and the microstructure uniformity. In the basic Sr2-xCaxNaNb5O15 composition, the (Sr, Ca)/Na ratio is changed, whereby the occupancies of Sr, Ca and Na in lattices which constitute the tungsten-bronze type structure and into which Sr, Ca, and Na can enter are reduced to facilitate the entrance of Sr into the lattices and thus inhibit the formation of a secondary phase. Further, a predetermined amount of Al and/or Si is added to lower the sintering temperature and to make the microstructure uniform. Additionally, a predetermined amount of Mn is added to make the polarization easy.
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: November 25, 2014
    Assignee: Taiyo Yuden Co., Ltd.
    Inventor: Yutaka Doshida
  • Publication number: 20140339458
    Abstract: A piezoelectric ceramic contains a major proportion of potassium sodium niobate and has a carbon content after firing of 55 to 1,240 ppm by mass.
    Type: Application
    Filed: May 14, 2013
    Publication date: November 20, 2014
    Applicant: TDK CORPORATION
    Inventors: Masahito FURUKAWA, Tomohisa AZUMA, Taku MASAI, Yasuhiro AIDA
  • Publication number: 20140339459
    Abstract: The present invention relates to a method of manufacturing a piezoelectric ceramic body and devices therefrom. The method comprises mixing a piezoelectric ceramic powder with a polymer binder and surfactant to form a slip mixture, casting the slip mixture into a mold and setting to the slip mixture in the mold to form a green body, cutting the green body to form a cut green body with an array of micron-sized ceramic elements and separation, and sintering the cut green body to form a sintered ceramic body. The sintered ceramic body can be further process to encasing in a polymer material to form a piezoelectric ceramic-polymer composite. The piezoelectric ceramic-polymer composite can be further processed to form devices such as acoustic transducers and sensors.
    Type: Application
    Filed: April 21, 2014
    Publication date: November 20, 2014
    Applicant: SONAVATION, INC.
    Inventors: De Liufu, Louis Regniere
  • Patent number: 8889030
    Abstract: A ternary polycrystalline material based on lead hafnate (PbHfO3) and having improved dielectric, piezoelectric, and/or thermal stability properties. The Pb(Hf,Ti)O3 based material can exhibit enhanced electromechanical coupling factors when compared to PZT based ceramics and can be used as high performance actuators, piezoelectric sensors and/or ultrasonic transducers. The ternary polycrystalline material can have a perovskite crystal structure with an ABO3 formula and can be characterized by a substitution of heterovalent acceptor and donor ions at A or B (Zr/Hf) sites.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: November 18, 2014
    Assignee: The Penn State Research Foundation
    Inventors: Shujun Zhang, Dawei Wang, Mingfu Zhang, Shiyi Guo, Thomas R. Shrout
  • Publication number: 20140319405
    Abstract: To perform poling treatment in a simple procedure by dry process. An aspect of the invention is a magnetic field poling device including: a first holding part configured to hold a film-to-be-poled 2; a second holding part configured to hold a magnet generating a magnetic field B to the film-to-be-poled 2; and a moving mechanism configured to move the first holding part or the second holding part in a direction perpendicular to the direction of the magnetic field B.
    Type: Application
    Filed: October 14, 2011
    Publication date: October 30, 2014
    Inventors: Takeshi Kijima, Yuuji Honda, Tomoyuki Araki
  • Patent number: 8871111
    Abstract: A piezoelectric/electrostrictive ceramic composition is provided which exhibits high density and excellent crystallinity even in the case of firing under lower temperature conditions than in conventional cases, and which also exhibits excellent piezoelectric/electrostrictive properties. An ABO3 compound (first main component) with Bi at the A site and with B1 and B2 elements at the B site (B1 consists of at least one kind of element having an ionic valence of two or less and selected from the group consisting of Mg, Cr, Mn, Fe, Co, Ni, Cu, Zn, and rare-earth elements; and B2 consists of at least one kind of element having an ionic valence of four or more and selected from the group consisting of V, Nb, Ta, Sb, Mo, and W) is dissolved in the form of a solid solution into another ABO3 compound (second main component) with at least Pb at the A site.
    Type: Grant
    Filed: March 16, 2009
    Date of Patent: October 28, 2014
    Assignee: NGK Insulators, Ltd.
    Inventors: Tomohiko Hibino, Takaaki Koizumi
  • Patent number: 8858822
    Abstract: A ceramic material includes first and second ceramic materials. The first ceramic material has a perovskite structure and defines a host lattice. The first ceramic material contains lead, zirconium and titanium, e.g., lead zirconate titanate. The second ceramic material has a cryolite structure. The ceramic material may be part of a piezo-actuator containing ceramic layers formed of the ceramic material.
    Type: Grant
    Filed: January 14, 2005
    Date of Patent: October 14, 2014
    Assignee: EPCOS AG
    Inventors: Adalbert Feltz, Heinz Florian, Michael Schossmann
  • Publication number: 20140292160
    Abstract: Provided is a lead-free piezoelectric material having a satisfactory and stable piezoelectric constant and electric insulation property in a wide practical temperature range. Provided is a piezoelectric material, including a perovskite-type metal oxide represented by the following general formula (1) as a main component, the piezoelectric material containing Mn in a content of 0.01 part by weight or more and 0.80 part by weight or less with respect to 100 parts by weight of the perovskite-type metal oxide: (Li?xNa?yK?zBa?Bi0.5?+?)a(Ti?+?Fe?) O3 . . . (1), where 0.800???0.999, 0???0.150, 0.001???0.050, ?+?+?=1, 0?x?0.050, 0.045?y?0.450, 0.045?z?0.450, 0.450?x+y+z?0.500, and 0.980?a?1.020.
    Type: Application
    Filed: March 18, 2014
    Publication date: October 2, 2014
    Applicants: FUJI CHEMICAL CO., LTD., CANON KABUSHIKI KAISHA
    Inventors: Makoto Kubota, Jumpei Hayashi, Fumio Uchida, Kenji Maeda, Chiemi Shimizu
  • Publication number: 20140285070
    Abstract: The invention relates to a ceramic material, comprising lead zirconate titanate, which additionally contains K and optionally Cu. The ceramic material can be used in an electroceramic component, for example a piezoelectric actuator. The invention also relates to methods for producing the ceramic material and the electronic component.
    Type: Application
    Filed: October 24, 2012
    Publication date: September 25, 2014
    Applicant: EPCOS AG
    Inventors: Alexander Glazunov, Adalbert Feltz
  • Publication number: 20140285062
    Abstract: The present disclosure provides a piezoelectricity ceramic material. The piezoelectricity ceramic material includes main components that are represented by a general chemical formula of PbZraTib(Nb2/3Ni1/3)1-a-bpl O3+c%BaW0.5Cu0.5O3 d%SiO2 and satisfy the following condition: 0.1?a?0.4, 0.2?b?0.5, 0.1?c?3, and 0.05?d?1. The low-temperature sintering adopted by the present disclosure reduces energy consumption and reduces the volatilization of PbO, which avoids the fluctuation and deviation of the ceramic components, reduces the pollution to then environment caused by volatilization, and reduces the corrosion to the sintering machine as well. Furthermore, the present disclosure provides a piezoelectricity ceramic sinter and a method for processing the same, as well as a piezoelectricity ceramic device. In a multi-layer device, the device cost is greatly reduced.
    Type: Application
    Filed: March 5, 2014
    Publication date: September 25, 2014
    Applicants: AAC Acoustic Technologies (Suzhou) Co., Ltd., AAC Acoustic Technologies (Shenzhen) Co., Ltd.
    Inventor: Shaohua Su
  • Publication number: 20140264142
    Abstract: A method is described for inserting or dispersing quartz within a substrate containing polymers polarizable by an electromagnetic field having electrical resistivity, from an insulator to conductor or vice versa, modifiable by said field. The method involves dispersing in the substrate particles having a sandwich structure including two conductive layers and a layer with piezoelectric characteristics in the middle.
    Type: Application
    Filed: October 9, 2012
    Publication date: September 18, 2014
    Applicant: SPF LOGICA S.R.L.
    Inventors: Giorgio Eberle, Fabio Cappelli, Giuseppe Paronetto
  • Publication number: 20140265729
    Abstract: The present invention provides a piezoelectric material which has excellent insulating and piezoelectric properties and which contains no lead and potassium and also provides a piezoelectric element and a multilayered piezoelectric element each using the above piezoelectric material. The piezoelectric material is a perovskite-type metal oxide represented by the following general formula (1). (1?x){(NayBa1-z)(NbzTi1-z)O3}-xBiFeO3??(1) In the formula, 0<x?0.015, 0.80?y?0.95, 0.85?z?0.95 are satisfied. The piezoelectric element includes the above piezoelectric material and a pair of electrodes each provided in contact therewith. The multilayered piezoelectric element includes piezoelectric material layers formed of the above piezoelectric material and electrodes containing at least one internal electrode so as to be alternately laminated with each other.
    Type: Application
    Filed: October 22, 2012
    Publication date: September 18, 2014
    Inventors: Shunsuke Murakami, Takayuki Watanabe, Makoto Kubbota
  • Patent number: 8821748
    Abstract: A ceramic or single crystal ferroelectric and a method of manufacture are disclosed. The ceramics and single crystals of the present disclosure are located near phase boundaries between ferroelectric and antiferroelectric phases. These ceramics, single crystals, and composite may be used in pulsed power applications.
    Type: Grant
    Filed: November 12, 2010
    Date of Patent: September 2, 2014
    Assignee: TRS Technologies, Inc.
    Inventors: Wesley S. Hackenberger, Edward F. Alberta
  • Publication number: 20140239774
    Abstract: Textured ceramic compositions having improved piezoelectric characteristics as compared with their random counterparts are provided. Methods of making the compositions and devices using them are also included. More particularly, compositions comprising textured ceramic Na0.5Bi0.5TiO3—BaTiO3(NBT-BT) materials synthesized from high aspect ratio NBT seeds exhibit improved characteristics, including an increased longitudinal piezoelectric constant (d33) and magnetoelectric coupling coefficient over randomly oriented NBT-BT. Additionally provided are compositions comprising of nanostructured Na0.5B0.5TiO3—BaTiO3 ferroelectric whiskers having a high aspect ratio. Nanostructured whiskers can be used to improve the piezoelectric properties of the bulk ceramics. The inventive materials are useful in microelectronic devices, with some finding particular application as multilayer actuators and transducers.
    Type: Application
    Filed: October 31, 2013
    Publication date: August 28, 2014
    Inventors: Deepam Maurya, Shashank Priya
  • Patent number: 8790538
    Abstract: Disclosed is a composition for ferroelectric thin film formation which is used in the formation of a ferroelectric thin film of one material selected from the group consisting of PLZT, PZT, and PT. The composition for ferroelectric thin film formation is a liquid composition for the formation of a thin film of a mixed composite metal oxide formed of a mixture of a composite metal oxide (A) represented by general formula (1): (PbxLay)(ZrzTi(1?z))O3 [wherein 0.9<x<1.3, 0?y?0.1, and 0?z?0.9 are satisfied] with a composite oxide (B) or a carboxylic acid (B) represented by general formula (2): CnH2n+1COOH [wherein 3?n?7 is satisfied]. The composite oxide (B) contains one or at least two elements selected from the group consisting of P (phosphorus), Si, Ce, and Bi and one or at least two elements selected from the group consisting of Sn, Sm, Nd, and Y (yttrium).
    Type: Grant
    Filed: December 27, 2010
    Date of Patent: July 29, 2014
    Assignees: Mitsubishi Materials Corporation, STMicroelectronics (Tours) SAS
    Inventors: Jun Fujii, Hideaki Sakurai, Takashi Noguchi, Nobuyuki Soyama
  • Publication number: 20140184878
    Abstract: A piezoelectric material includes a metal oxide represented by general formula (1) below, a Mn content is 0.04 parts by weight or more and 0.36 parts by weight or less, a Li content ? is 0.0013 parts by weight or more and 0.0280 parts by weight or less, a Bi content ? is 0.042 parts by weight or more and 0.850 parts by weight or less, and the contents ? and ? satisfy 0.5?(?·MB)/(?·ML)?1 (Ba1-xCax)a(Ti1-y-zZrySnz) O3 (1) (where x, y, z, and a satisfy 0.09?x?0.30, 0.025?y?0.074, 0?z?0.02, and 0.986?a?1.02). A piezoelectric material according to an embodiment of the present invention contains no lead, has a low degree of temperature dependency of piezoelectric performance within operation temperature ranges of piezoelectric elements, and good piezoelectric properties.
    Type: Application
    Filed: December 23, 2013
    Publication date: July 3, 2014
    Inventors: Takayuki Watanabe, Shunsuke Murakami, Tatsuo Furuta
  • Publication number: 20140184876
    Abstract: A piezoelectric material includes, as a main component, a perovskite-type metal oxide represented by a general formula (Ba1-xCax)a(Ti1-y-zSnyZrz)O3 where 1.00?a?1.01, 0.125?x?0.300, 0?y?0.020, and 0.041?z?0.074, the perovskite-type metal oxide containing copper (Cu) and manganese (Mn). A Cu content relative to 100 parts by weight of the metal oxide is 0.02 parts by weight or more and 0.60 parts by weight or less on a metal basis, and a Mn content relative to 100 parts by weight of the metal oxide is 0.12 parts by weight or more and 0.40 parts by weight or less on a metal basis.
    Type: Application
    Filed: December 23, 2013
    Publication date: July 3, 2014
    Inventors: Hidenori Tanaka, Shinya Koyama, Jumpei Hayashi, Hiroshi Saito
  • Publication number: 20140167562
    Abstract: Provided is piezoelectric/electrostrictive body generating large electric-field-induced strain, and having high durability with respect to an electric field having a direction opposite to a polarization direction. A composition of piezoelectric/electrostrictive ceramics is represented by a general formula Pba{ZnbSbc(ZrdTi1-d)1-b-c}O3. As for a, b, c, and d, 0.985?a?0.998, 0.010?b?0.040, 0.025?c?0.090, 0.460?d?0.510, and 2.125?c/b?3.000 are satisfied. An accessory component containing at least one element selected from the group consisting of Mn, Cr, Fe, and a rare-earth element may be added to a main component. An additive amount of the at least one element relative to 100 parts by weight of the main component is 0.3 parts by weight or less in terms of an oxide.
    Type: Application
    Filed: February 25, 2014
    Publication date: June 19, 2014
    Applicant: NGK Insulators, Ltd.
    Inventor: Tomohiko HIBINO
  • Publication number: 20140152144
    Abstract: Provided is an oriented piezoelectric ceramic of satisfactory piezoelectricity, which includes a metal oxide represented by (1?x)NaNbO3-xBaTiO3. Also provided are a piezoelectric element using the oriented piezoelectric ceramic which includes the metal oxide represented by (1?x)NaNbO3-xBaTiO3, and a liquid discharge head, an ultrasonic motor, and a dust removing device which use the piezoelectric element. An oriented piezoelectric ceramic includes as a main component a metal oxide represented by the following general formula (1), in which the oriented piezoelectric ceramic has a lead content and a potassium content that are each 1,000 ppm or less: (1?x)NaNbO3-xBaTiO3 . . . General formula (1), where a relationship of 0<x<0.3 is satisfied.
    Type: Application
    Filed: May 28, 2012
    Publication date: June 5, 2014
    Applicants: UNIVERSITY OF YAMANASHI, CANON KABUSHIKI KAISHA
    Inventors: Takayuki Watanabe, Shunsuke Murakami, Nobuhiro Kumada
  • Publication number: 20140145106
    Abstract: A lead-free piezoelectric material that does not undergo depolarization in a wide operating temperature range and has a good piezoelectric constant is provided. A piezoelectric material include a perovskite-type metal oxide represented by (Ba1-xCax)a(Ti1-yZry)O3 (where 1.00?a?1.01, 0.125?x?0.175, and 0.055?y?0.090) as a main component, and manganese incorporated in the perovskite-type metal oxide. The manganese content relative to 100 parts by weight of the perovskite-type metal oxide is 0.02 parts by weight or more and 0.10 parts by weight or less on a metal basis.
    Type: Application
    Filed: June 26, 2012
    Publication date: May 29, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Jumpei Hayashi, Tatsuo Furuta, Yasushi Shimizu, Takanori Matsuda, Hiroshi Saito, Makoto Kubota
  • Patent number: 8734670
    Abstract: A lead-free piezoelectric ceramic material has the general chemical formula xBi(A0.5Ti0.5)O3-y(Bi0.5K0.5)TiO3-z(Bi0.5Na0.5)TiO3, wherein x+y+z=1, x?0, and A=Ni or Mg.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: May 27, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Yu Hong Jeon, David Cann, Eric Patterson, Parkpoom Jarupoom, Brady Gibbons, Peter Mardilovich
  • Publication number: 20140139070
    Abstract: A lead-free piezoelectric ceramic composition mainly includes a first crystal phase (KNN phase) and a second crystal phase (NTK phase). In the first crystal phase (KNN phase), a plurality of crystal grains formed of an alkali niobate/tantalate perovskite oxide having piezoelectric characteristics is bound to each other in a deposited state. The second crystal phase (NTK phase) is formed of a compound containing titanium (Ti) and fills spaces between the crystal grains in the first crystal phase.
    Type: Application
    Filed: July 4, 2012
    Publication date: May 22, 2014
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Masato Yamazaki, Takayuki Matsuoka, Kazuaki Kitamura, Hideto Yamada, Toshiaki Kurahashi, Katsuya Yamagiwa, Kazushige Ohbayashi
  • Publication number: 20140131611
    Abstract: A lead-free piezoelectric material that has stable, excellent piezoelectric constant and mechanical quality factor in a wide operating temperature range is provided. A piezoelectric material include a perovskite-type metal oxide represented by (Ba1-xCax)a(Ti1-yZry)O3 (where 1.00?a?1.01, 0.155?x?0.300, 0.041?y?0.069) as a main component, and manganese incorporated in the perovskite-type metal oxide. The manganese content relative to 100 parts by weight of the perovskite-type metal oxide is 0.12 parts by weight or more and 0.40 parts by weight or less on a metal basis.
    Type: Application
    Filed: June 26, 2012
    Publication date: May 15, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Jumpei Hayashi, Tatsuo Furuta, Yasushi Shimizu, Takanori Matsuda, Hiroshi Saito, Makoto Kubota