Lead, Zirconium, Titanium Or Compound Thereof Containing Patents (Class 252/62.9PZ)
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Publication number: 20120217430Abstract: A piezoelectric element comprises a piezoelectric layer and an electrode provided with the piezoelectric layer. The piezoelectric layer is made of a composite oxide containing bismuth ferrite, barium titanate, and bismuth zinc titanate.Type: ApplicationFiled: February 23, 2012Publication date: August 30, 2012Applicant: SEIKO EPSON CORPORATIONInventor: Tomohiro SAKAI
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Patent number: 8241519Abstract: A <110> domain engineered relaxor-PT single crystals having a dielectric loss of about 0.2%, a high electromechanical coupling factor greater than about 85%, and high mechanical quality factor greater than about 500 is disclosed. In one embodiment, the relaxor-PT material has the general formula, Pb(B1B2)O3—Pb(B3)O3, where B1 may be one ion or combination of Mg2+, Zn2+, Ni2+, Sc3+, In3+, Yb3+, B2 may be one ion or combination of Nb5+, Ta5+, W6+, and B3 may be Ti4+ or combination of Ti4+ with Zr4+ and/or Hf4+.Type: GrantFiled: March 16, 2010Date of Patent: August 14, 2012Assignees: TRS Technologies, Inc., Penn State Research FoundationInventors: Jun Luo, Wesley S. Hackenberger, Shujun Zhang, Richard J. Meyer, Jr., Thomas R. Shrout, Nevin P. Sherlock
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Patent number: 8231803Abstract: A piezoelectric ceramic 10 composed mainly of a three-component solid solution represented by the following general formula (1), wherein x, y and z in general formula (1) satisfy the following formulas (2), (3), (4) and (5). x(Bi1/2Na1/2)TiO3?y(Bi1/2Li1/2)TiO3?z(Bi1/2K1/2)TiO3??(1) 0.80?x?0.96??(2) 0.02?y?0.08??(3) 0.01?z?0.Type: GrantFiled: March 11, 2009Date of Patent: July 31, 2012Assignee: TDK CorporationInventors: Masahito Furukawa, Daisuke Tanaka, Masakazu Hirose, Tadashi Takenaka, Hajime Nagata, Yuji Hiruma
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Publication number: 20120187325Abstract: A piezoelectric ceramic composition comprising: a matrix material comprising at least two matrix components having a perovskite structure or consisting of said matrix components; a first matrix component being selected from (Bi0.5A0.5)EO3 and BaEO3; and a further matrix component being Bi(Me0.5E0.5)O3, wherein A is selected from an alkali metal, particularly sodium or potassium, or a mixture of alkali metals; wherein E is independently selected from titanium, zirconium and mixtures of titanium and zirconium; and wherein Me is selected from bivalent metals.Type: ApplicationFiled: July 29, 2010Publication date: July 26, 2012Inventors: Christian Hoffmann, Alain Kounga Njiwa, Yongli Wang
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Publication number: 20120181474Abstract: A material includes a ceramic material having a general formula of Pb1-(m/2)x-z+zMmx (Zr1-yTiy-z+z)O3+a-zPbTiO3, where M is at least one element selected from: Nd, La, Ba, Sr, Sb, Bi, K, Na; where: 0?x?0.1, 0.3?y?0.7; 0?z?y, 0?(a-z) ?0.03; and where m corresponds to a valency of a metal M, and has a value +1, +2 or +3.Type: ApplicationFiled: December 19, 2011Publication date: July 19, 2012Applicant: EPCOS AGInventors: Hermann Gruenbichler, Christl Lisa Mead, Manfred Schweinzger, Aniko Nagy
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Patent number: 8216488Abstract: A class of ceramic compositions according to the formula Pb(1-z)Mz(Mn1/3Sb2/3)x(ZryTi1-y)1-xO3 where M is selected to be either Sr or Ba, x is selected to be between 0.01 and 0.1, y is selected to be between 0.35 and 0.55, and z is selected to be between 0.01 and 0.10. In some embodiments of the above composition, one or more dopants is added to the compositions. The dopant(s) may be selected from the group comprising: PbO, CeO2, SnO2, Sm2O3, TeO2, MoO3, Nb2O5, SiO2, CuO, CdO, HfO2, Pr2O3, and mixtures thereof. The dopants can be added to the ceramic composition in individual amounts ranging from 0.01 wt % to up to 5.0 wt %. The preferred ceramic compositions exhibit one or more of the following electromechanical properties: a relative dielectric constant (?) of between 1200 and 2000, a mechanical quality factor (Qm) of between 1500 and 2800; a piezoelectric strain constant (d33) of between 250-450 pC/N, a dielectric loss factor (tan ?) of between 0.002-0.Type: GrantFiled: May 5, 2011Date of Patent: July 10, 2012Assignee: Piezotech, LLCInventor: De Liufu
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Publication number: 20120169183Abstract: There are provided a ceramic composition for a piezoelectric actuator allowing for low-temperature sintering and a method of manufacturing the same, and a piezoelectric actuator. A Cuo powder and an MnO powder as an sintring additive are added to a PZT-PZN piezoelectric ceramic powder to allow low-temperature sintering at a temperature of 950° C. or lower, and the usage of high-priced palladium (Pd) used as materials for high-temperature inner electrodes is decreased due to lowering of the sintering temperature, and thereby to achieve cost reduction.Type: ApplicationFiled: December 22, 2011Publication date: July 5, 2012Inventors: Boum Seock Kim, Seung Gyo Jeong, Eun Tae Park
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Publication number: 20120145943Abstract: A preferred piezoelectric ceramic material is a BiFeO3—PbZrO3—PbTiO3 ternary solid solution wherein proportions of the constituent perovskite metal oxides are selected so that the material exhibits relatively high Curie temperatures above 380° C. and useful piezoelectric properties.Type: ApplicationFiled: December 8, 2010Publication date: June 14, 2012Inventors: Xiaoli Tan, Wei Hu
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Publication number: 20120146462Abstract: A lead-free piezoelectric ceramic composition includes a first crystal phase of alkali niobate/tantalate type perovskite oxide having piezoelectric properties and a second crystal phase of A—Ti—B—O composite oxide (where the element A is an alkali metal; the element B is at least one of Nb and Ta; and the contents of the element A, the element B and Ti are not zero). Examples of the second crystal phase are those represented by A1?xTi1?xB1+xO5, and x preferably satisfies 0?x?0.15.Type: ApplicationFiled: January 14, 2011Publication date: June 14, 2012Applicant: NGK SPARK PLUG CO., LTD.Inventors: Masato Yamazaki, Takayuki Matsuoka, Katsuya Yamagiwa, Kazushige Ohbayashi
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Patent number: 8182713Abstract: There is provided a lead-free piezoelectric material capable of showing a high piezoelectric coefficient (d33>500 pC/N) exceeding that of soft PZT. The lead-free piezoelectric material contains no toxic element such as Pb, comprising a pseudo-binary solid solution of {[(Ba1-x1M1x1)((Ti1-xZrx)1-y1N1y1)O3]-?%[(Ba1-yCay)1-x2M2x2)(Ti1-y2N2y2)O3]} (wherein M1, N1, M2 and N2 represent an additive element)(abbreviated as BZT-?% BCT).Type: GrantFiled: March 10, 2009Date of Patent: May 22, 2012Assignee: National Institute for Materials ScienceInventors: Ren Xiaobing, Liu Wenfeng
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Publication number: 20120112607Abstract: Disclosed are a ceramic composition for a piezoelectric actuator and a piezoelectric actuator including the same. The ceramic composition for a piezoelectric actuator includes piezoelectric ceramic powder expressed by a chemical formula, (1?x)Pb(Zr(1-y)Tiy)O3-xPb(Ni1/3Nb2/3)O3, where, x ranges from 0.25 to 0.4, and y ranges from 0.4 to 0.7. The ceramic composition for a piezoelectric actuator permits low-temperature firing while implementing superior piezoelectric properties.Type: ApplicationFiled: July 26, 2011Publication date: May 10, 2012Inventors: Boum Seock KIM, Seung Gyo JEONG, Eun Tae PARK
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Publication number: 20120104309Abstract: A lead-based particulate piezoelectric material has a median diameter of less than 1 ?m and a particle size distribution expressed by [arithmetic deviation/mean] of no greater than 15% and in which no less than 85% of all particles are cubic.Type: ApplicationFiled: October 31, 2011Publication date: May 3, 2012Applicant: NGK Insulators, Ltd.Inventor: Takaaki KOIZUMI
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Publication number: 20120098386Abstract: The invention relates to a ceramic material of the formula [(Bi0.5Na0.5TiO3)(1-y)(BaTiO3)y](1-x)(K0.5Na0.5NbO3)x, and also to a method for producing the same and to a component comprising said material.Type: ApplicationFiled: November 6, 2009Publication date: April 26, 2012Applicant: Epcos AGInventors: Alain Brice Kounga Njiwa, Yongli Wang, Irmgard Penzinger
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Publication number: 20120091861Abstract: The present invention relates to a ceramic composition for a piezoelectric actuator and a piezoelectric actuator comprising the same. The ceramic composition for piezoelectric actuator includes a piezoelectric ceramic powder expressed by a Chemical Formula: (1-x)Pb(Zr(1-y)Tiy)O3-xPb(Ni1/3Nb2/3)O3, wherein x is 0.25 to 0.4 and y is 0.4 to 0.7; and a CuO powder and a PbO powder forming a liquid-phase compound at a sintering temperature or less of the piezoelectric ceramic powder. The ceramic composition for a piezoelectric actuator according to the present invention exhibits excellent piezoelectric characteristics and allows for low-temperature firing.Type: ApplicationFiled: March 30, 2011Publication date: April 19, 2012Inventors: Boum Seock KIM, Eun Tae Park, Seung Gyo Jeong, Sahn Nahm, Chan Hee Nam
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Publication number: 20120080636Abstract: According to a preferred embodiment, the piezoelectric ceramic includes a complex oxide having the composition represented by formula (1) or (2), and Mn at 0.2-1.2 mass % or 0.2-3 mass %, respectively, in terms of MnCO3. (Pb1-aA1a)TixZr1-x-y-z-b(Zn1/3A22/3)y(Yb1/2A21/2)zSnbO3??(1) (Pb1-aA1a)TixZr1-x-y-b(Zn1/3A22/3)ySnbO3??(2) [In formula (1), A1 represents at least one element selected from the group consisting of Ca, Sr and Ba, and A2 is at least one element selected from the group consisting of Nb, Ta and Sb, and includes at least Nb. In formula (2), A1 represents at least one element selected from among Ca, Sr and Ba, A2 represents at least one element selected from among Nb and W, and A2 includes at least Nb.Type: ApplicationFiled: September 21, 2011Publication date: April 5, 2012Applicant: TDK CorporationInventors: Goushi Tauchi, Daisuke Tanaka, Masahito Furukawa
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Patent number: 8142678Abstract: A perovskite type oxide of a single crystal structure or a uniaxial-oriented crystal structure is represented by ABO3. Site A includes Pb as a main component and site B includes a plurality of elements. The perovskite type oxide includes a plurality of crystal phases selected from the group consisting of tetragonal, rhombohedral, orthorhombic, cubic, pseudo-cubic and monoclinic systems and the plurality of crystal phases are oriented in the direction of <100>.Type: GrantFiled: August 7, 2006Date of Patent: March 27, 2012Assignee: Canon Kabushiki KaishaInventors: Takanori Matsuda, Katsumi Aoki, Toshihiro Ifuku, Kenichi Takeda, Tetsuro Fukui, Hiroshi Funakubo, Shintaro Yokoyama
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Patent number: 8142679Abstract: The present invention provides a piezoelectric ceramic composition having a high thermal resistance and a high piezoelectric distortion constant and a piezoelectric element using the piezoelectric ceramic composition. The piezoelectric ceramic composition of the present invention contains Na, Bi, Ti, Cr and O, wherein the content ratio of Na, Bi, Ti and Cr in terms of oxides thereof falls within the following composition range: aNa2O-bBi2O3-cTiO2-dCrO3/2 where a, b, c and d are mole fractions; 0.030?a?0.042; 0.330?b?0.370; 0.580?c?0.620; 0<d?0.017; and a+b+c+d=1. The piezoelectric ceramic composition preferably has a main crystal phase of bismuth layer-structured ferroelectric, more preferably Na0.5Bi4.5Ti4O15 crystal. The piezoelectric element of the present invention includes a piezoelectric body formed of the piezoelectric ceramic composition and at least a pair of electrodes held in contact with the piezoelectric body.Type: GrantFiled: June 22, 2009Date of Patent: March 27, 2012Assignee: NGK Spark Plug Co., Ltd.Inventors: Masato Yamazaki, Takayuki Matsuoka, Katsuya Yamagiwa, Takeshi Mitsuoka
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Patent number: 8142677Abstract: A piezoelectric ceramic composition excellent in all of the electric property Qmax, heat resisting properties and temperature characteristics of oscillation frequencies is provided. The piezoelectric ceramic composition comprises a phase mainly comprising lead zirconate titanate having a perovskite structure and an Al-containing phase. In the piezoelectric ceramic composition, the main component preferably comprises Mn and Nb, and is preferably represented by a composition formula of Pb?[(Mn1/3Nb2/3)xTiyZrz]O3 (wherein 0.97???1.01, 0.04?x?0.16, 0.48?y?0.58, 0.32?z?0.41).Type: GrantFiled: February 28, 2005Date of Patent: March 27, 2012Assignee: TDK CorporationInventors: Masakazu Hirose, Tomohisa Azuma, Norimasa Sakamoto
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Publication number: 20120043494Abstract: A piezoelectric single crystal ingot is produced by the Bridgman method and contains a relaxor having a composition of Pb(Mg, Nb)O3 and lead titanate having a composition of PbTiO3. In the piezoelectric single crystal ingot, the compositional fraction of lead titanate does not vary monotonically in the growth direction of a single crystal and the variation of the compositional fraction thereof is within the range of ±2.0 mole percent over a length of 30 mm or more. A piezoelectric single crystal device is produced from the piezoelectric single crystal ingot.Type: ApplicationFiled: August 18, 2010Publication date: February 23, 2012Applicant: JFE MINERAL COMPANY, LTD.Inventor: Mitsuyoshi Matsushita
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Patent number: 8119024Abstract: A piezoelectric single crystal ingot is produced by the Bridgman method and contains a relaxor having a composition of Pb(Mg, Nb)O3 and lead titanate having a composition of PbTiO3. In the piezoelectric single crystal ingot, the compositional fraction of lead titanate does not vary monotonically in the growth direction of a single crystal and the variation of the compositional fraction thereof is within the range of ±2.0 mole percent over a length of 30 mm or more. A piezoelectric single crystal device is produced from the piezoelectric single crystal ingot.Type: GrantFiled: August 18, 2010Date of Patent: February 21, 2012Assignee: JFE Mineral Company, Ltd.Inventor: Mitsuyoshi Matsushita
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Publication number: 20120037839Abstract: 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: ApplicationFiled: August 10, 2011Publication date: February 16, 2012Applicant: TRS TECHNOLOGIES, INC.Inventors: Wesley S. HACKENBERGER, Jun LUO, Thomas R. SHROUT, Kevin A. SNOOK, Shujun ZHANG, Fei LI, Raffi SAHUL
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Publication number: 20120038713Abstract: A piezoelectric film is constituted of a perovskite oxide represented as: Pb1+?(ZrxTiy)1-a(MgbNb1-b)aOz, where ? and z are values within ranges where a perovskite structure is obtained and ?=0 and z=3 are standard, Pb is replaceable with another A site element in an amount of a range where the perovskite structure is obtained, b is a value in a range of 0.090?b?0.25, and a Nb ratio at a B site satisfies 0.13?a×(1?b).Type: ApplicationFiled: August 10, 2011Publication date: February 16, 2012Inventor: Takayuki NAONO
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Patent number: 8110121Abstract: A piezoceramic composition has a nominal empirical formula of Pb1?aREbAEc[ZrxTiy(FefWw)z]O3. RE is a rare earth metal with a fraction b and AE is an alkaline earth metal with a fraction c. Iron is present with an iron fraction f·z, and tungsten with a tungsten fraction w·z. In addition, the following relationships apply: a<1; 0=b=0.15; 0=c=0.5; f>0; w>0; 0.1=f/w=5; x>0; y>0; z>0 and x+y+z=1. A method of producing a piezoceramic material using the piezoceramic composition has the steps: a) provision of a green ceramic body with the piezoceramic composition, and b) heat treatment of the green body, a piezoceramic of the piezoceramic material being produced from the piezoceramic composition. The heat treatment encompasses calcining and/or sintering. The piezoceramic composition undergoes compaction at below 1000° C.Type: GrantFiled: December 19, 2006Date of Patent: February 7, 2012Assignee: Siemens AktiengesellschaftInventors: Francois Bamiere, Katrin Benkert, Stefan Denneler, Morgane Radanielina, Carsten Schuh
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Publication number: 20120018664Abstract: To obtain a method of producing a high-density lead zirconium titanate-based sintered body having uniform crystalline phases and containing a large amount of PbO, provided is a method of producing a lead zirconium titanate-based sintered body, including: producing a pre-sintered body by sintering raw material powder of lead zirconium titanate having a stoichiometric composition at a temperature of 900° C. or more and 1,200° C. or less; pulverizing the pre-sintered body; producing lead-excessive mixed powder by adding PbO powder to powder obtained by pulverizing the pre-sintered body; and sintering the lead-excessive mixed powder at a temperature lower than the sintering temperature of the pre-sintered body. Because the sintering process is divided into two stages, a high-density (e.g., 95% or more) PZT sintered body constituted only of PZT having a stoichiometric composition in which PbZrO3, PbTiO3, ZrO2, TiO2, PbO, and other intermediate compounds are absent, and excessive PbO can be obtained.Type: ApplicationFiled: October 4, 2011Publication date: January 26, 2012Applicant: Ulvac, Inc.Inventors: Shouichi HASHIGUCHI, Poong KIM, Takanori MIKASHIMA
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Publication number: 20120019108Abstract: A piezoelectric ceramic composition including a perovskite-type oxide, wherein the perovskite-type oxide has Na, K, Li, Ba and Sr at the A site and Nb, Ta and Zr at the B site, and has a crystal phase transition in a temperature range of ?50 to 150° C., the crystal phase transition being accompanied by an endotherm of no greater than 4 J/g, as well as a piezoelectric element 20 provided with a piezoelectric ceramic 1 that contains the piezoelectric ceramic composition.Type: ApplicationFiled: May 21, 2010Publication date: January 26, 2012Applicant: TDK CORPORATIONInventors: Daisuke Tanaka, Masahito Furukawa, Takeo Tsukada
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Patent number: 8092706Abstract: Disclosed is a piezoelectric ceramic composition which is produced by adding two or more metal elements and has excellent piezoelectric properties. The piezoelectric composition comprises the main ingredient represented by the general formula: [Lix(K1-yNay)1-x](Nb1-z-wTaZSbw)O3 (0?x?0.2, 0?y?1, 0?z?0.4, 0<w?0.2) and the auxiliary ingredient represented by the general formula: ABO3 (wherein A and B independently represent a metal element having a valence of +3 or together represent a combination of at least two metal elements each having a valence of +3 in average; and ABO3 represents a compound having a perovskite structure).Type: GrantFiled: February 26, 2007Date of Patent: January 10, 2012Assignee: Konica Minolta Holdings, Inc.Inventors: Shingo Uraki, Ryo Suzuki, Takaaki Tsurumi
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Publication number: 20110316937Abstract: A piezoelectric film has a columnar crystal structure constituted of a plurality of columnar crystals, and contains a perovskite oxide represented by the following formula (P) as a main component: PbaAb[(ZrcTil-c)l-dBd]Oe,??(P) where Pb and A are A-site elements, and A is at least one element selected from a group consisting of Bi, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Ca, Sr and Ba; Zr, Ti and B are B-site elements, and B is at least one element selected from a group consisting of Nb, Ta and Sb; a is an amount of lead, b is an amount of the element A, c is a Zr/Ti ratio, d is an amount of the element B, e is an amount of oxygen; values of a, b and d satisfy a<1, a+b?1, and 0<d<b; and a value of e is within a range where the perovskite structure is obtained and e=3 is standard.Type: ApplicationFiled: June 24, 2011Publication date: December 29, 2011Inventors: Takami ARAKAWA, Takayuki Naono, Takamichi Fujii
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Publication number: 20110316393Abstract: A piezoelectric film includes crystals of a complex oxide having a perovskite structure with (100)-preferred orientation and represented as: Pb1+?[(ZrxTi1-x)1-yNby]Oz, where x is a value in a range of 0<x<1, y is a value in a range of 0.13?y?0.25, and ? and z are values within ranges where the perovskite structure is obtained and ?=0 and z=3 are standard, wherein a ratio between a diffraction peak intensity I(100) from a perovskite (100) plane and a diffraction peak intensity I(200) from a perovskite (200) plane as measured by X-ray diffraction satisfies I(100)/I(200)?1.25.Type: ApplicationFiled: June 24, 2011Publication date: December 29, 2011Inventors: Takayuki NAONO, Takami ARAKAWA
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Publication number: 20110311815Abstract: A ternary single crystal relaxor piezoelectric of PMN-PZ-PT grown from a novel melt using the Vertical Bridgeman method. The ternary single crystals are characterized by a Curie temperature, Tc, of at least 150° C. and a rhombohedral to tetragonal phase transition temperature, Trt, of at least about 110° C. The ternary crystals further exhibit a piezoelectric coefficient, d33, in the range of at least about 1200-2000 pC/N.Type: ApplicationFiled: May 16, 2011Publication date: December 22, 2011Applicant: TRS TECHNOLOGIES, INC.Inventors: Jun LUO, Wesley HACKENBERGER
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Patent number: 8075795Abstract: A piezoelectric body includes a perovskite type compound that is expressed by a compositional formula being Pb (Zrx Ti1-x)1-y My O3, where M is at least one of Ta and Nb, x is in a range of 0.51?x?0.57, and y is in a range of 0.05?y<0.2, wherein the perovskite type compound contains at least one of SiO2 and GeO2 as an additive, and the additive is added in an amount of 0.5 mol % or higher but 5 mol % or lower with respect to the amount of perovskite type compound.Type: GrantFiled: March 12, 2009Date of Patent: December 13, 2011Assignee: Seiko Epson CorporationInventors: Yasuaki Hamada, Akio Konishi, Takeshi Kijima
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Publication number: 20110292134Abstract: A perovskite oxide, which includes a first component represented by General Formula (P1) given below and a second component represented by General Formula (P2) given below. (Bix1, Xx2) (Fez1, Mnz2)O3 ??(P1) (Ay1, Yy2)BO3 ??(P2) (where, Bi is an A-site element and X is an A-site element with an average ion valence of not less than four. A is one kind or a plurality of kinds of A site elements other than Pb with an average ion valence of two, Y is a one kind or a plurality of kinds of A-site elements with an average valence of not less than three. Fe and Mn are B-site elements, and B is one kind or plurality of kinds of B-site elements with an average ion valence of four.) 0.6?x1<1.0, 0?x2?0.4, 0.65?y1<1.0, 0?y2?0.4, x2+y2>0, 0.6?z1<1.0, 0?z2?0.4.Type: ApplicationFiled: May 26, 2011Publication date: December 1, 2011Inventors: Tsutomu SASAKI, Yukio SAKASHITA
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Publication number: 20110292133Abstract: Disclosed is a non-lead perovskite oxide having a low Curie temperature and high ferroelectricity represented by General Formula (P) given below. (Bix1, Bax2, Xx3)(Fey1, Tiy2, Mny3)O3 ??(P) (where, Bi and Ba are A-site elements, X is one kind or a plurality of kinds of A-site elements, other than Pb and Ba, with an average ion valence of 2. Fe, Ti, and Mn are B-site elements. O is oxygen. 0<x1+X2<1.0, 0<x3<1.0, 0<y1+y2<1.0, 0?y3<1.0, 0<x1, 0<x2, 0<y1, 0<y2. The standard molar ratios among A-site elements, B-site elements, and oxygen are 1:1:3, but the molar ratios among them may deviate from the standard ratios within a range in which a perovskite structure may be formed.Type: ApplicationFiled: May 26, 2011Publication date: December 1, 2011Inventors: Tsutomu SASAKI, Yukio Sakashita
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Publication number: 20110268965Abstract: Provided is a piezoelectric material having a high Curie temperature and satisfactory piezoelectric characteristics, the piezoelectric material being represented by the following general formula (1): A(ZnxTi(1-x))yM(1-y)O3??(1) where A represents a Bi element, M represents at least one element selected from Fe, Al, Sc, Mn, Y, Ga, and Yb; x represents a numerical value of 0.4?x?0.6; and y represents a numerical value of 0.17?y?0.60.Type: ApplicationFiled: January 1, 2010Publication date: November 3, 2011Applicants: CANON KABUSHIKI KAISHA, SOPHIA UNIVERSITY, TOKYO INSTITUTE OF TECHNOLOGYInventors: Makoto Kubota, Toshihiro Ifuku, Hiroshi Funakubo, Keisuke Yazawa, Hiroshi Uchida, Takashi Iijima, Bong-yeon Lee
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Publication number: 20110268235Abstract: The present invention generally relates to high-energy composition utilized with reactors and combustors for generating electricity either directly through nuclear or magnetic energy, or indirectly through thermal energy that incorporate the high-energy composition into at least one reactor operable at a temperature greater than 1000 Celsius and containing the composition with at least one co-reactant of Boron-10, with the Boron-10 specifically enabling an at least five percent increase of energy generation and/or efficiency as compared the same reaction without Boron-10. In one embodiment, the present invention relates to the Boron-10 composition within a high-energy reactor operable at a temperature at least 1000 Celsius and a method that applies at least one externally applied force acting upon the Boron-10 portion of the reactor.Type: ApplicationFiled: April 29, 2010Publication date: November 3, 2011Inventor: Michael Gurin
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Patent number: 8034250Abstract: Provided is a piezoelectric material including a lead-free perovskite-type composite oxide which is excellent in piezoelectric characteristics and temperature characteristics and is represented by the general formula (1): xABO3-yA?BO3-zA?B?O3 in which A is a Bi element; A? is a rare earth element including La; B is at least one element selected from Ti, Zn, Sn and Zr; A? is at least one element selected from Ba, Sr and Ca; B? is at least one element selected from divalent, trivalent, pentavalent, tetravalent, and hexavalent elements; and x is a value of 0.10 or more and 0.95 or less, y is a value of 0 or more and 0.5 or less, and z is a value of 0 or more and 0.7 or less, provided that x+y+z=1.Type: GrantFiled: March 18, 2009Date of Patent: October 11, 2011Assignee: Canon Kabushiki KaishaInventors: Jumpei Hayashi, Zuyi Zhang, Toshihiro Ifuku, Satoshi Wada, Keisuke Yamato, Nobuhiro Kumada, Masaki Azuma, Hiroshi Funakubo, Takashi Iijima, Soichiro Okamura
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Patent number: 8034249Abstract: A piezoelectric/electrostrictive ceramic sintered body has a microstructure in which a matrix phase and an additional material phase having different compositions coexist and the additional material phase is dispersed in the matrix phase. A residual strain ratio of the additional material phase alone is larger than a residual strain ratio of the matrix phase alone. The matrix phase and the additional material phase have a composition in which a Mn compound containing Mn atoms of 0 parts by mol or more and 3 parts by mol or less and a Sr compound containing Sr atoms of 0 parts by mol or more and 1 part by mol or less are contained in a composite of 100 parts by mol represented by a general formula {Liy(Na1-xKx)1-y}a(Nb1-z-wTazSbw)O3, where a, x, y, z and w satisfy 0.9?a?1.2, 0.2?x?0.8, 0.0?y?0.2, 0?z?0.5 and 0?w?0.1, respectively.Type: GrantFiled: July 6, 2010Date of Patent: October 11, 2011Assignee: NGK Insulators, Ltd.Inventors: Kazuyuki Kaigawa, Ritsu Tanaka
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Publication number: 20110241483Abstract: A piezoelectric composition includes a compound represented by a general expression Bi4Ti3O12—SrBi4Ti4O15 as a main component; and Mn or a Mn compound as an additive. A Mn content is less than 1.0% by mass based on a main component amount.Type: ApplicationFiled: March 2, 2011Publication date: October 6, 2011Applicant: TDK CORPORATIONInventors: Masahito FURUKAWA, Daisuke TANAKA, Tadashi TAKENAKA, Hajime NAGATA, Yuji HIRUMA
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Publication number: 20110240908Abstract: An electret composite comprising a polymer matrix material that contains particles of a piezoelectric material with deep trapping centers on the interphase boundaries between the matrix and particles of a piezoelectric material. The piezoelectric material may have a tetragonal or a rhombohedral structure, and the polymer matrix material may be selected from high-density polyethylene, polyvinylidene fluoride, and a copolymer of vinylidenechloride and tetrafluoroethylene. The composite has a potential difference>500V, lifespan>10 years, dielectric permeability?20, specific electric resistance?1014 Ohm·m; provision of deep trapping centers on the interphase boundaries with activation energy in the range of 1 to 1.25 eV, and stable electret charge.Type: ApplicationFiled: March 31, 2010Publication date: October 6, 2011Inventors: Mirza Abdul oglu Kurbanov, Azad Agalar Oglu Bayramov, Nuru Arab Oglu Safarov, Irada Sultanaxmed Gizi Sultanaxmedova, Sevinj Nadir Gizi Musaeva
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Publication number: 20110241493Abstract: A ceramic having a plurality of crystal grains that contain lead, lithium, and boron, are arranged in a planar direction, and have a mutually same crystal orientation with respect to the thickness direction.Type: ApplicationFiled: March 8, 2011Publication date: October 6, 2011Applicant: NGK Insulators, Ltd.Inventors: Takaaki KOIZUMI, Takuya Katsuno
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Publication number: 20110233451Abstract: A hybrid piezoelectric composite comprises a layer of a polymer matrix comprising particles of a PZT group in a micro range of dimensions, which is sandwiched between two layers of a polymer matrix comprising particles of a dielectric material in a nano range of dimensions. The materials of both layers are polarized with electrothermal polarization. The polymer matrices of both component composites may comprise high-density polyethylene, polyvinylidene fluoride, polypropylene, or low-density polyethylene. The dielectric material of the first component nanocomposite may be selected from the group consisting of SiO2 and BaTiO3, and the ceramic particles of the second component are made from a piezoelectric ceramic material of a PZT group having a tetragonal structure.Type: ApplicationFiled: March 26, 2010Publication date: September 29, 2011Inventors: Mirza Abdul Oglu Kurbanov, Azad Agalar Oglu Bayramov, Nuru Arab Oglu Safarov, Farida Nasir Gizi Tatardar, Adil A. Mextili, Irada Sultanaxmed Gizi Sultanaxmedova
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Publication number: 20110234044Abstract: Provided is a piezoelectric/electrostrictive ceramic which produces large electric-field induced strain without performing an aging treatment for a long period of time. A piezoelectric/electrostrictive ceramic sintered body in which the ratio of the number of ions at A sites to the number of ions at B sites in a perovskite structure is at least 0.94 to at most 0.99 is subjected to an oxygen heat treatment at a temperature of 600 to 1050° C. for 2 to 100 hours under an atmosphere with an oxygen partial pressure of 0.05 to 1.0 atm.Type: ApplicationFiled: November 22, 2010Publication date: September 29, 2011Applicants: NGK Insulators, Ltd., The University of TokyoInventors: Yuji NOGUCHI, Masaru MIYAYAMA, Toshikatsu KASHIWAYA, Takaaki KOIZUMI, Shuichi OZAWA, Ritsu TANAKA
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Publication number: 20110234046Abstract: Provided is a piezoelectric ceramic composition which can increase Qmax of a resonator and inhibit the resonator from changing its oscillation frequency F0 under a low temperature environment. The piezoelectric ceramic composition has a structure represented by the following general formula (1): (Pb?Ln?Me?)(Ti1?(x+y+z)ZrxMnyNbz)O3??(1) where Ln is a lanthanoid element, Me is an alkaline-earth metal element, ?>0, ?>0, ??0, 0.965??+?+??1.000, 0.158?x?0.210, y?0, z?0, and 1?(x+y+z)>0.Type: ApplicationFiled: March 21, 2011Publication date: September 29, 2011Applicant: TDK CorporationInventors: Goushi Tauchi, Tomohisa Azuma, Hideaki Sone
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Patent number: 8021568Abstract: A piezoceramic composition of a calculated empirical formula Pb1-aREbAEc[ZrxTiy(NinMom)z]O3, wherein RE represents a rare earth metal having a rare earth metal content b, AE represents an alkaline earth metal having an alkaline earth metal content c, nickel is provided with a nickel content n.z, and molybdenum is provided with a molybdenum content m.z. Furthermore, the following correlations apply: a<1; 0=b=0.15; 0=c=0.5; n>0; m>0; 0.1=n/m=5; x>0; y>0; z>0, and x+y+z=1. In a method for producing a piezoceramic component a) a green ceramic member containing the piezoceramic composition is supplied; and b) the green member is subjected to a thermal treatment such that the piezoceramic material of the component is produced from the piezoceramic composition. The thermal treatment encompasses calcining and/or sintering of the piezoceramic composition. The piezoceramic composition is compressed below 1000° C.Type: GrantFiled: December 18, 2006Date of Patent: September 20, 2011Assignee: Siemens AktiengesellschaftInventors: Francois Bamiere, Katrin Benkert, Stefan Denneler, Morgane Radanielina, Carsten Schuh
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Publication number: 20110221833Abstract: A piezoelectric element includes a piezoelectric layer, and an electrode provided on the piezoelectric layer. The piezoelectric layer is composed of a compound oxide having a perovskite structure and containing bismuth lanthanum ferrate manganate and barium titanate. The molar ratio of the barium titanate to the total amount of the bismuth lanthanum ferrate manganate and the barium titanate is 0.09 or more and 0.29 or less. A liquid ejecting head includes a pressure-generating chamber communicating with a nozzle opening, and a piezoelectric element as described above. A liquid ejecting apparatus includes the above-described liquid ejecting head.Type: ApplicationFiled: March 11, 2011Publication date: September 15, 2011Applicant: SEIKO EPSON CORPORATIONInventors: Takayuki Yonemura, Kazuya Kitada
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Publication number: 20110215679Abstract: A piezoelectric film is formed on a surface of a substrate by a vapor deposition process without generating grain boundaries which are substantially parallel to the surface of the substrate and are caused by lamination. A normal of a (100) plane of each of crystals constituting the piezoelectric film is inclined from a normal of the surface of the substrate by an angle of not smaller than 6° and not larger than 36°.Type: ApplicationFiled: March 2, 2011Publication date: September 8, 2011Inventor: Takayuki NAONO
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Publication number: 20110217454Abstract: A method for manufacturing a piezoelectric film includes: forming a piezoelectric precursor film including Bi, Fe, Mn, Ba, and Ti; and obtaining a piezoelectric film preferentially oriented with the (110) plane by crystallizing the piezoelectric precursor film.Type: ApplicationFiled: March 1, 2011Publication date: September 8, 2011Applicant: SEIKO EPSON CORPORATIONInventor: Yasuaki HAMADA
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Publication number: 20110216132Abstract: A process for producing a piezoelectric oxide having a composition (A, B, C)(D, E, F)O3, where each of A, B, C, D, E, and F represents one or more metal elements. The composition is determined so as to satisfy the conditions (1), (2), (3), and (4), 0.98?TF(P)?1.01,??(1) TF(ADO3)>1.0,??(2) TF(BEO3)<1.0, and??(3) TF(BEO3)<TF(CFO3)<TF(ADO3),??(4) where TF(P) is the tolerance factor of the perovskite oxide, and TF(ADO3), TF(BEO3), and TF(CFO3) are respectively the tolerance factors of the compounds ADO3, BEO3, and CFO3.Type: ApplicationFiled: March 4, 2011Publication date: September 8, 2011Inventors: Yukio SAKASHITA, Tsutomu SASAKI
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Publication number: 20110205307Abstract: A sol-gel liquid for use in forming an individualized electromechanical conversion film of an electromechanical conversion element by inkjet methods, including a lead zirconate titanate (PZT) or the PZT and other metal complex oxides; and an organic solvent having properties surrounded by A, B, C, D, E and F in triangular composition diagram of FIG. 3, and having a viscosity of from 3 to 13 mPa·s, a surface tension of 30±5 mN/m and a dehydration rate of from 70 to 80% relative to pure water.Type: ApplicationFiled: December 15, 2010Publication date: August 25, 2011Inventors: Keiji UEDA, Yoshikazu Akiyama, Osamu Machida, Akira Shimofuku, Takakazu Kihira
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Publication number: 20110204277Abstract: A class of ceramic compositions according to the formula Pb(1-z)Mz(Mn1/3Sb2/3)x(ZryTi1-y)1-xO3 where M is selected to be either Sr or Ba, x is selected to be between 0.01 and 0.1, y is selected to be between 0.35 and 0.55, and z is selected to be between 0.01 and 0.10. In some embodiments of the above composition, one or more dopants is added to the compositions. The dopant(s) may be selected from the group comprising: PbO, CeO2, SnO2, Sm2O3, TeO2, MoO3, Nb2O5, SiO2, CuO, CdO, HfO2, Pr2O3, and mixtures thereof. The dopants can be added to the ceramic composition in individual amounts ranging from 0.01 wt % to up to 5.0 wt %. The preferred ceramic compositions exhibit one or more of the following electromechanical properties: a relative dielectric constant (?) of between 1200 and 2000, a mechanical quality factor (Qm) of between 1500 and 2800; a piezoelectric strain constant (d33) of between 250-450 pC/N, a dielectric loss factor (tan ?) of between 0.002-0.Type: ApplicationFiled: May 5, 2011Publication date: August 25, 2011Inventor: De Liufu
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Publication number: 20110204754Abstract: A piezoelectric ceramic includes a main constituent represented by the general formula {(1?x) (K1-a-bNaaLib)(Nb1-cTac)O3}?xM2M4O3}, and as accessory constituents, 2? mol of Na, (?+?) mole of an M4? element, and ? mol of Mn with respect to 100 mol of the main constituent, where 0.1????, 1??+??10, and 0???10, M2 is Ca, Ba, and/or Sr, the M4 element and the M4? element are Zr, Sn, and/or Hf, 0?x?0.06, 0?a?0.9, 0?b?0.1, and 0?c?0.3. Even in the case of using Ni as the main constituent in an internal electrode material of a piezoelectric element and carrying out co-firing, favorable piezoelectric properties can be obtained without defective polarization.Type: ApplicationFiled: April 21, 2011Publication date: August 25, 2011Applicant: MURATA MANUFACTURING CO., LTD.Inventor: Shinichiro Kawada