Abstract: A dielectric ceramic composition containing a dielectric material and a glass, characterized in that the dielectric material is represented by the compositional formula a·Li2O-b·(CaO1-x—SrOx)-c·R2O3-d·TiO2 (wherein x satisfies 0?x<1; R is at least one selected from La, Y and other rare-earth metals; and a, b, c and d satisfy 0?a?20 mol %, 0?b?45 mol %, 0<c?20 mol %, 40?d?80 mol % and a+b+c+d=100 mol %.) and the glass contains at least 30 % by weight of Bi2O3.

Abstract: A porous catalyst layer containing mixed conducting oxide having substantially a perovskite structure and containing a first element selected from Co and Fe, and a second element selected from In, Sn and Y arranged in the B site in the perovskite structure is contiguous to a second surface (1a) of a selective oxygen-permeable dense continuous layer (1) containing mixed conducting oxide. A porous intermediate catalyst layer (3) containing mixed conducting oxide and at least one of Co, Fe, Mn and Pd is contiguous to a first layer (1b) of the dense continuous layer (1). A porous reactive catalyst layer (4) provided with a metal catalyst selected from at least one of Ni, Co, Ru, Rh, Pt, Pd, Ir and Re and a support is continguous to the porous intermediate catalyst layer (3) in a manner to sandwich between the dense continuous layer (1) and the porous reactive catalyst layer (4).

Abstract: An electroceramic component includes a base body, contact layers on the base body, a dielectric layer in the base body that includes a single-phase perovskite ceramic having a composition of Ag(Nb1-xTax)O3, and an electrode layer in the base body containing a precious metal. The electrode layer is sintered with the dielectric layer.

Abstract: Disclosed herein is a small particle oxide powder for dielectrics. The oxide powder has a perovskite structure, an average particle diameter [D50(?m)] of 0.3 ?m or less, a particle size distribution of the average particle diameter within 3%, a particle size distribution satisfying a condition D99/D50<2.5, a content of OH? groups of 0.2 wt % and a C/A axial ratio of 1.006 or more. A method of manufacturing the oxide powder comprises the steps of mixing TiO2 particles and a compound solved with at least one element represented by A of the perovskite structure of ABO3; drying and pulverizing the mixture of TiO2 and the compound; calcining the pulverized mixture; adding the oxide containing the elements of the site A to the coated TiO2 particles and wet-mixing, drying and pulverizing; primarily calcining and pulverizing the pulverized powder under vacuum; and secondarily calcining and pulverizing the powder.

Abstract: The present invention relates to a novel ZnTiO3-based dielectric material, having the composition represented by the formula (Zn1-aMga)(Ti1-b-cMnbDc)dO3, wherein D is an element having a valence of 5 or above, 0?a?0.5, c?b?0.1, 0<c?0.1, 1?d?1.5, which has properties of ultra low sintering temperature, high reliability, and high dielectric strength, and is capable of being applied to produce low capacitance multilayer ceramic capacitor with high quality factor, low ESR, and high insulation resistance. The present invention also relates to a method of preparing such a novel ZnTiO3-based dielectric material.

Abstract: Ferroelectric metal oxide crystalline particles are produced by first producing nanoparticles of a ferroelectric metal oxide and dispersing the nanoparticles in a gas phase. Then, the nanoparticles are processed by heat treatment with the nanoparticles being maintained in the gas phase in a dispersed state. The nanoparticles may be produced by using a laser ablation method. The ferroelectric metal oxide may have a perovskite crystal structure.

Abstract: A perovskite compound of the formula, (Na1/2Bi1/2)1-xMx(Ti1-yM?y)O3±z, where M is one or more of Ca, Sr, Ba, Pb, Y, La, Pr, Nd, Sm, Eu, Gd, Th, Dy, Ho, Er, Tm, Yb and Lu; and M? is one or more of Zr, Hf, Sn, Ge, Mg, Zn, Al, Sc, Ga, Nb, Mo, Sb, Ta, W, Cr, Mn, Fe, Co and Ni, and 0.01<x<0.3, and 0.01<y<0.3, and z<0.1 functions as an electromechanically active material. The material may possess electrostrictive or piezoelectric characteristics.

Abstract: A perovskite titanium-containing composite oxide particle having a composition represented by general formula (I), where the specific surface area is about 10 to about 200 m2/g, the specific surface area diameter D1 of primary particles defined by formula (II) is about 10 to about 100 nm, and a D2/D1 ratio of the average particle size D2 of secondary particles to D1 is about 1 to about 10: M(TiO3)??(I) wherein M is at least one of Ca, Sr, Ba, Pb, or Mg, D1=6/?S??(II) wherein ? is the density of the particles, and S is the specific surface area of the particles is disclosed. The present invention has a small particle size and excellent dispersion properties, so that the particle is suitable for application to functional materials.

Abstract: Single-phase, non-cubic and single-phase, cubic ferroelectric/paraelectric perovskite-structured materials having reasonably low and fairly temperature insensitive dielectric constants (stable dielectric constants over a wide range of operating temperatures of ?80° C. to 100° C.), reasonable loss tangents (<˜10?1), high tunability, and significantly lowered Curie temperature below the temperature range of operation for previous undoped perovskite structures are provided. The FE/PE materials of the present invention have dilute charge-compensated substitutions in the Ti site of the perovskite structure. This single-phase structure or a variant of it with a Ti rich composition, provided herein, allows for pulsed-laser-deposition of a thin film with uniform transfer of the structure of the target into the deposited film, which enables production of very small, lightweight devices that are extremely efficient and consume little power.

Abstract: A glass frit for dielectrics, a dielectric ceramic composition, a multilayer ceramic capacitor, and a method for manufacturing the same are disclosed. The glass frit has a composition represented by the formula aSiO2-bB2O3-cLi2O-dK2O-eCaO-fAl2O3-gTiO2-hZrO2, wherein the ratio of components satisfies the conditions of 20?a?35, 20?b?35, 20?c?30, 3?d?5, 2?e?12, 2?f?10, 1?g?12 and 1?h?7 in terms of mol % where a+b+c+d+e+f+g+h=100. The dielectric ceramic composition comprises 100 parts by weight of (Ca1-xRx)(Zr1-yTiy)O3, 0.5˜2.5 parts by weight of the glass frit, and 1.0˜5.0 parts by weight of a Mn compound. Additionally, the multilayer ceramic capacitor, and the method for manufacturing the same also use the glass frit having the above composition. The ratio of tetracoordinate boron to tricoordinate boron is increased in a lithium borosilicate glass, thereby enhancing structural property, and the components of Al2O3, TiO2 and ZrO2, enhance acid resistance.

Abstract: A piezoelectric porcelain composition containing a complex oxide having a perovskite structure mainly composed of Pb, Zr, and Ti; and the following component (a) and/or (b), or component (A) and/or (B): (a) Ag and/or an Ag compound, and Mo and/or an Mo compound (b) silver molybdate [Ag2MoO4] (A) Ag and/or an Ag compound, Mo and/or an Mo compound, and W and/or a W compound (B) silver molybdate-tungstate [Ag2Mo(1?X)WXO4](where X is a number from 0.3 to 0.

Abstract: A method of manufacturing a ceramic coating material which includes stirring a material including a complex oxide in the presence of a catalyst containing platinum group elements. The material is a sol-gel material which includes at least one of a hydrolysate and a polycondensate of the complex oxide.

Abstract: A ceramic material has piezoelectric characteristics, can be sintered at low temperature, and is suited to various piezoelectric devices. The ceramic material primarily includes Pb, Zr, and Ti and has the general formula ABOd, in which A is (Pb1?aM1a?b), where M1 is selected from the group consisting of group 3A elements, Li, Na, K, Mg, Ca, and Sr, and B is [(M21/3Nb2/3?c)?Zr?Ti?], where M2 is one or more elements capable of forming at least a perovskite structure in the ceramic material, or the formula PbxM31?x[(M41/3Nb2/3)e(Co1/3Nb2/3)f(Zn1/3Nb2/3)gZrhTii]O3, where M3 denotes one or more elements selected from among the group consisting of La, K, Er, and Yb and M4 denotes an element selected from among the group consisting of Ni, Mn, and Sr. The ceramic material can be prepared by sintering at a temperature of 950° C.

Abstract: A chemically bonded ceramic material based on calcium aluminate hydrate with additives of primarily calcium titanate, but also chemically similar compounds. The material is a biocompatible material for implants, particularly for orthopaedic and dental applications. The material possesses the properties required for an orthopaedic biocement. It cures through reaction with water and develops its strength within a short period of time, has good workability prior to curing, is shape stable, has a low heat generation during curing, and is friendly to adjacent tissues.

Abstract: The invention relates to the dielectric composition on the basis of barium titanate (BaTiO3) that is present with Ba(Zn1/3Nb2/3)O3 in a perovslite structure, which dielectric composition exhibits an average grain size d50 in the range of 0.2 ?m to 0.5 ?m and a crystallite size d10 below 0.3 ?m.

Abstract: A dielectric ceramic composition contains 100 parts by weight of a primary component represented by a[(SrbCa1-b)TiO3]-(1?a)[Bi2O3.nTiO2] wherein a and b are moles and n is the molar ratio of TiO2 to Bi2O3; w parts by weight of MgTiO3 x parts by weight of SiO2; y parts by weight of MnOm (MnCO3 equivalent); and z parts by weight of LnOk, wherein m is 1 to 2; Ln is at least one of lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, dysprosium, holmium and erbium; and k is in the range of 1.5 to 2 such that LnOk is electroneutral, wherein a, b, n, w, x, y and z satisfy the relationships 0.90?a?0.95, 0.90?b?0.95, 1.8?n?3.0, 5.0?w?10.0, 0.1?x?1.0, 0.1?y?0.3, and 1.0?z?5.0.

Abstract: A dielectric ceramic composition comprising a main component including a dielectric oxide expressed by a composition formula {(Ca1-xMex)O}m.(Zr1-yTiy)O2, and a first subcomponent including at least one of oxides selected from V, Nb, W, Ta, Mo and Cr and compounds which become an oxide of these after firing; wherein a symbol Me in the formula included in the main component is at least one of Sr, Mg and Ba, symbols m, x and y indicating composition mole ratios in the formula included in the main component are 0.8?m?1.3, 0?x?1.00 and 0.1?y?0.8, and a ratio of the first subcomponent to 100 moles of the main component is 0.01 atomic %?the first subcomponent<5 atomic % in a conversion of metal element in an oxide.

Abstract: Dielectric composite materials including an electronically tunable dielectric phase and a calcium and oxygen-containing compound are disclosed. The tunable phase may comprise a material such as barium strontium titanate. The calcium/oxygen compound may comprise CaO or a transition metal-containing compound such as Ca2Nb2O7 or CaTiO3. The material may also include a rare earth oxide dopant such as CeO2. The materials resist dielectric breakdown and possess improved combinations of electronic properties. The materials may be tailored for specific applications.

Abstract: A dielectric ceramic composition comprising a main component including 53.00 to 80.00 mol % magnesium oxide converted to MgO, 19.60 to 47.00 mol % titanium oxide converted to TiO2 and 0.05 to 0.85 mol % manganese oxide converted to MnO. This dielectric ceramic composition may comprises 0.00 to 0.20 mol % of at least any one of vanadium oxide, yttrium oxide, ytterbium oxide or holmium oxide converted to V2O5, Y2O3, Yb2O3 and Ho2O3 respectively.

Abstract: A dielectric ceramic contains a primary constituent represented by general formula (1): a[(SrbCa1?b)TiO3]?(1?a)[Bi2O3.nTiO2] (wherein a and b indicate molar amounts, and n indicates a molar ratio of TiO2 to Bi2O3), and a secondary constituent represented by general formula (2): xMgTiO3+yMnOm+zLn2O3 (wherein x, y, and z indicate weight per 100 parts by weight of the primary constituent, m is 1 to 2, and Ln is at least one of La, Ce, Pr, Nd, Sm, Eu, Gd, Dy, Ho, and Er), wherein a, b, n, x, y, and z satisfy the expressions 0.88?a?0.92, 0.30?b?0.50, 1.8?n?3.0, 1.0?x?3.0, 0.1?y?2.0, and 0<z?3.0. A ceramic electronic component including the dielectric ceramic is also disclosed.

Abstract: An aluminum titanate-based ceramic body having a composition a formula comprising a(Al2O3.TiO2)+b(CaO.Al2O3.2SiO2)+c(SrO.Al2O3.2SiO2)+d(BaO.Al2O3.2SiO2)+e(3Al2O3.2SiO2)+f(Al2O3)+g (SiO2)+h(Fe2O3.TiO2)+i(MgO.2TiO2), wherein a, b, c, d, e, f, g, h, and i are weight fractions of each component such that (a+b+c+d+e+f+g+h+i)=1, wherein 0.5<a?0.95; 0?b?0.5; 0?c?0.5; 0?d?0.5; 0<e?0.5; 0?f?0.5; 0?g?0.1; 0?h?0.3; 0?i?0.3; b+d>0.01. A method of forming the ceramic body is provided. The ceramic body is useful in automotive emissions control systems, such as diesel exhaust filtration.

Abstract: A high frequency dielectric ceramic composition includes: as a major component a composition which contains a rare earth element (Re), Al, Sr, and Ti as metal elements and has a composition formula expressed by a molar ratio of aRe2O3-bAl2O3-cSrO-dTiO2 in which a, b, c, and d satisfy the following formula; 0.113?a?0.172, 0.111?b?0.171, 0.322?c?0.388, 0.323?d?0.396, and a+b+c+d=1.000; and 0.01 to 2 parts by weight on a Fe2O3 conversion basis of Fe as an element, based on 100 parts by weight of the major component.

Abstract: This invention provides tunable devices incorporating the dielectric CaCu3Ti4O12. CaCu3Ti4O12 is especially useful in tunable devices such as phase shifters, matching networks, oscillators, filters, resonators, and antennas comprising interdigital and trilayer capacitors, coplanar waveguides and microstrips.

Abstract: A dielectric ceramic composition comprising at least a main component containing a dielectric oxide of a composition expressed by {(Sr1?xCax)O}m.(Ti1?yZry)O2 and a first subcomponent containing at least one type of compound selected from oxides of V, Nb, W, Ta, and Mo and/or compounds forming these oxides after firing, wherein the symbols m, x, and y showing the molar ratio of the composition in the formula contained in the main component are in relations of 0.94<m<1.08, 0?x?1.00, and 0?y?0.20 and the ratio of the first subcomponent with respect to 100 moles of the main component, which is converted to the metal element in the oxide, is 0.01 mole?first subcomponent<2 moles. According to this dielectric ceramic composition, it is possible to obtain a superior resistance to reduction at the time of firing, obtain a superior capacity-temperature characteristic after firing, and improve the accelerated life of the insulation resistance.

Abstract: A glass ceramic composition which can be fired at a low temperature and which has a high dielectric constant, a relatively small thermal expansion coefficient and a small temperature coefficient of dielectric constant is provided. The glass ceramic composition contains about 5% to 75% by weight of TiO2 powder, about 5% to 75% by weight of CaTiSiO5 powder and about 15% to 50% by weight of glass powder.

Abstract: This invention provides compositions of the formula EuCu3M4O12 wherein M is Ge, Ti, Sn or mixtures thereof. These compositions have high dielectric constant and low loss over a frequency range of from 1 kHz to 1 MHz.

Abstract: Tunable dielectric materials including an electronically tunable dielectric ceramic and a low loss glass additive are disclosed. The tunable dielectric may comprise a ferroelectric perskovite material such as barium strontium titanate. The glass additive may comprise boron, barium, calcium, lithium, manganese, silicon, zinc and/or aluminum-containing glasses having dielectric losses of less than 0.003 at 2 GHz. The materials may further include other additives such as non-tunable metal oxides and silicates. The low loss glass additive enables the materials to be sintered at relatively low temperatures while providing improved properties such as low microwave losses and high breakdown strengths.

Abstract: A first inventive microwave dielectric composition comprises a ceramic composition represented by AnR4Ti3+nO12+3n, where a is an alkaline earth metal element, R is a rare earth element and characterized in that a case satisfying A=Ba and a case of R=La is excluded and the compositional ratio n=1,2 or 4. A second inventive microwave dielectric composition comprises a ceramic composition represented by AXR4Ti3+XO12+3X, where A is an alkaline earth metal element, R is a rare earth element and characterized in that the compositional ratio X is within a range of 0.5<X<5 (excluding X=1,2, 4). A variety of small microwave dielectric resonators having excellent transmitting/receiving characters can be mass produced inexpensively from that composition.

Abstract: The present invention provides a dielectric ceramic composition comprising: 30 to 90% by weight of a crystallized glass powder capable of depositing a diopside crystal, 1 to 40% by weight of a calcium titanate powder, a strontium titanate powder or a mixed powder thereof, and 0 to 60% by weight of at least one kind of a powder selected from the group consisting of Al2O3, TiO2, ZrO2, MgTiO3, BaTi4O9, La2Ti2O7, Nd2Ti2O7, Ca2Nb2O7, SrZrO3 and CaZrO3, and a dielectric ceramics obtained by firing the same.

Abstract: The present invention provides an electro-optic ceramic material including lead, magnesium, niobium and titanium having a propagation loss of less than about 3 dB/cm and a quadratic electro-optic coefficient of greater than about 2×10?16 m2/V2 at 20° C. at a wavelength of 1550 nm. The present invention also provides electro-optic devices including an electro-optic ceramic material including lead, magnesium, niobium and titanium having a propagation loss of less than about 3 dB/cm and a quadratic electro-optic coefficient of greater than about 2×10?16 m2/V2 at 20° C. at a wavelength of 1550 nm. The materials and devices of the present invention are useful in optical communications applications such as intensity and phase modulation, switching, and polarization control.

Abstract: The present invention relates to a microwave dielectric ceramic composition exhibiting excellent dielectric characteristics, including high Qu; and to a dielectric resonator which exhibits high Qu even when of large size. The present invention provides a microwave dielectric ceramic composition containing a primary component represented by CaTiO3-(1-x)REAlO3 [0.54?x?0.82] (wherein RE is composed only of an essential element La or composed of an essential element La and one or two optional elements selected from among Nd and Sm). The present invention also provides a microwave dielectric ceramic composition containing a primary component represented by the compositional formula: xCaTiO3-(1-x)LnAlO3 [0.54?x?0.82] (wherein Ln is at least one species selected from among Y, La, Nd, Sm, etc.); and Na in an amount as reduced to Na2O of 0.02 to 0.5 parts by mass on the basis of 100 parts by mass of the primary component.

Abstract: A ceramic composite with a mixed conducting oxide that has perovskite type crystal structure of {Ln1?aAa}{BxB?yB?z}O(3??) where a, x, y, and z are within the range of 0.8?a?1, 0<x, 0<y?0.5, 0?z?0.2, 0.98?x+y+z?1.02, and ? denotes a value that is determined so as to meet a charge neutralization condition. A denotes a combination of one or more kinds of elements selected out of Ba, Sr, and Ca. B denotes a combination of one or more kinds of elements selected out of Co, Fe, Cr, and Ga, the combination always containing Fe or Co. B? denotes a combination of one or more kinds of elements selected out of Nb, Ta, Ti, and Zr, the combination always containing Nb or Ta. The present invention is also directed to a mixed conducting oxide and a ceramic composite. The mixed conducting oxide is of formula AFexO(3??). A is selected out of Ba, Sr, and Ca, and is within the range of 0.98?x?1.02, and ? denotes a value determined so as to meet the charge neutralization conditions.

Abstract: Single-phase, non-cubic and single-phase, cubic ferroelectric/paraelectric lead-based perovskite-structured materials having reasonably low and fairly temperature insensitive dielectric constants (stable dielectric constants over a wide range of operating temperatures of ?80° C. to 100° C.), reasonable loss tangents (<˜10?1), high tunability, and significantly lowered Curie temperature below the temperature range of operation for previous undoped perovskite structures are provided. The FE/PE materials of the present invention have dilute charge-compensated substitutions in the Ti site of the perovskite structure. This single-phase structure or a variant of it with a Ti rich composition, provided herein, allows for pulsed-laser-deposition of a thin film with uniform transfer of the structure of the target into the deposited film, which enables production of very small, lightweight devices that are extremely efficient and consume little power.

Abstract: A method for manufacturing single crystal ceramic powder is provided. The method includes a powder supply step for supplying powder consisting essentially of ceramic ingredients to a heat treatment area with a carrier gas, a heat treatment step for heating the powder supplied to the heat treatment area at temperatures required for single-crystallization of the powder to form a product, and a cooling step for cooling the product obtained in the heat treatment step to form single crystal ceramic powder. The method provides single crystal ceramic powder consisting of particles with a very small particle size and a sphericity being 0.9 or higher.

Abstract: Disclosed is a nonreducible dielectric composition. Provided is a highly reliable TC based dielectric composition prepared by adding a sintering additive having excellent qualities to a conventional (Ca1-xSrx)m(Zr1-yTiy)O3 based dielectric composition, so that it can be sintered under a reducing atmosphere to be used in formation of a nickel electrode, can be sintered at a temperature of less than 1,300° C., and even more, at a low temperature of 1,250° C., and has a small dielectric loss and a high resistivity. The composition of the present invention includes a nonreducible dielectric composition comprising a main component expressed by the general formula, (Ca1-xSrx)m(Zr1-yTiy)O3, which has the ranges of 0?x?1, 0?y<0.09, and 0.7?m?1.05; and 0.

Abstract: A dielectric ceramic composition of high dielectric constant and low dielectric loss, which can be co-fired with Ag electrodes, is provided for use in various parts of electric and electronic appliances. Based on a base composition with a high dielectric constant, the composition comprises glass frit and optionally CuO, as represented by the following formula: a wt. % {x CaO-y1 Sm2O3-y2 Nd2O3-w Li2O-z TiO2}+b wt. % (ZnO—B2O3—SiO2 based or Li2O—B2O3—SiO2 based glass frit)+c wt. % CuO wherein, 13.0 mol %?x?20.0 mol %; 10.0 mol %?y1+y2?17.0 mol %; 6.0 mol %?w?11.0 mol %; 60.0 mol %?z?67.0 mol % with the proviso that x+y1+y2+w+z=100; 85.0 wt. %?a?97.0 wt. %; 3.0 wt. %?b?15.0 wt. %; and c?7.0 wt. %.

Abstract: The invention relates to a low temperature co-firing ceramic (LTCC) composition for microwave frequency represented by the following formula 1: Ca[(Li1/3Nb2/3)1-xTix]O3-?+y(B2O3.ZnO.SiO2.PbO)??(1) wherein x is molar ratio and 0?x?0.3; and y is wt % ratio and 0?y?15. The present invention relates to dielectric LTCC composition for microwave frequency that has high dielectric constants, high Q values, and stable temperature coefficients of the resonant frequency, and has sintering temperature as low as ?900° C. so as to be co-fired without reaction with an electrode such as silver (Ag). The compositions have excellent characteristics required to cellular phones and PCS in the range of 800 MHz˜1.9 GHz, which is commonly used, and laminated chip filters and antennas in the range of IMT 2000 of 2 GHz, which will be used.

Abstract: A ceramic material with a sintering temperature below 1000° C. and a Perovskite Structure with the general stoichiometric composition A′1-x-yA″xB′1-a-bB″aB′″bO3 whereby A′=Y, La, Pr, Nd; A″=Mg, Ca, Sr, Ba; B′=Mn, Ti, V, Cr, Ni, Zn, Pb, Sb, W, Zr; B″=Co; B′″=Cu, Bl; O<x<=0.4; 0<=y<=0.1; 0.09<a<=0.6 and; 0.09<=b<=0.6.

Abstract: A dielectric ceramic composition containing a first component and a second component (25 to 80 wt %) is used. The first component is a complex oxide represented by Formula: xZrO2-yTiO2-zL(1+u)/3M(2−u)/3O2 (L is at least one element selected from the group consisting of Mg, Zn, Co, and Mn, and M is at least one element selected from the group consisting of Nb and Tb. x, y, z, and u are numerical values represented by x+y+z=1, 0.10≦x≦0.60, 0.20 ≦y≦0.60, 0.01≦z≦0.70, 0≦u≦1.90). The second component is a glass composition containing an oxide of at least one element selected from the group consisting of Si, B, Al, Ba, Ca, Sr, Zn, Ti, La, and Nd.

Abstract: The characteristics of piezoceramic multilayer actuators based on lead-zirconate-titanate are determined to a great extent by the compatibility of PZT ceramics having a low sintering temperature with the AgPd internal metallisation during cofiring. It is important to take into consideration that Ag ions in PZT modifications have a high diffusivity at high temperatures (>800° C.) and in addition act as acceptor doping when integrated into the PZT system. The reduction of the fraction of the precious metal palladium, which prevents diffusion, is limited, as silver increasingly diffuses into the piezoceramic as the silver fraction in the internal electrodes increases. According to the invention, Ag+ ions are used to form valence-compensated compositions of the PZT system. A higher level of deformation is maintained, i.e. the acceptor-donor effect in the system is very similar to that of the PZT system modified conventionally without internal electrodes.

Abstract: Single-phase, non-cubic and single-phase, cubic ferroelectric/paraelectric materials comprising a charge compensated lead-based perovskite having the general formula ABO3 is provided, which has reasonably low and fairly temperature insensitive dielectric constants over operating temperatures of −80° C. to 100° C., reasonable loss tangents (<˜10−1), and high tunability. The FE/PE materials of the present invention have dilute charge-compensated substitutions in the Ti site of the perovskite structure.

Abstract: The present invention provides compounds and compositions capable of stimulating plant growth, regeneration of plant cells and tissues, and transformation of plant cells and tissues, comprising mono- and multi-substituted auxinic analogues of indole-3-acetic acid (IAA) comprising substituent groups such as halo-, alkyl-, alkoxy-, acyl-, acylamido- and acyloxy-groups. The invention relates to a method of using such mono- and multi-substituted auxinic analogues of IAA to affect growth, regeneration or transformation in monocotyledonous and dicotyledonous plants, as well as in transgenic plant tissues. The invention also contemplates the use of these auxinic IAA analogues in the presence of other plant growth regulators, such as cytokinin, etc., to enhance plant growth.

Abstract: A dielectric ceramic composition comprising at least a main component containing a dielectric oxide of a composition expressed by {(Sr1-xCax)O}m.(Ti1-yZry)O2 and a first subcomponent containing at least one type of compound selected from oxides of V, Nb, W, Ta, and Mo and/or compounds forming these oxides after firing, wherein the symbols m, x, and y showing the molar ratio of the composition in the formula contained in the main component are in relations of 0.94<m<1.08, 0≦x≦1.00, and 0≦y≦0.20 and the ratio of the first subcomponent with respect to 100 moles of the main component, which is converted to the metal element in the oxide, is 0.01 mole≦first subcomponent<2 moles. According to this dielectric ceramic composition, it is possible to obtain a superior resistance to reduction at the time of firing, obtain a superior capacity-temperature characteristic after firing, and improve the accelerated life of the insulation resistance.

Abstract: The soft piezoelectric ceramic composition is a soft piezoelectric ceramic composition sinterable at a reduced temperature with high piezoelectric parameters and is used in a piezoelectric device. Preferably the soft piezoelectric ceramic composition comprises: [(Pb1-m-nSrmBan)(1-y)Biy[](ZrxTi1-x)1-a-bNiaWb]O3+pCdO wherein m,n,x,y,a and b are molar ratio, p is wt % and are in ranges, repectively, 0.00≦m<0.18, 0.00≦n≦0.18,0.00≦(m+n)≦0.21,0.40≦x≦0.60 0.00<y<0.04, 0.00≦a≦0.02, 0.00<b≦0.02, 0.00<p≦2.00. The soft piezoelectric ceramic composition has high piezoelectric constants and electromechanical coupling coefficients and can be sintered at a reduced temperature below 1000° C. Further, the soft piezoelectric ceramic materials can be co-fired with pure Ag electrode below 960° C.

Abstract: Ferroelectric materials useful in monolithic uncooled infrared imaging use Ca and Sn substitutions in PbTiO3 and also have alternatives with dopants such as Dy, Ho, Bi, Ce, and Fe. The ferroelectrics may also be used in non-volatile integrated circuit memories.

Abstract: A microwave dielectric ceramic composition comprises a composition of the formula xMO-yLa2O3-zTiO2 wherein M is selected from Sr and Ca and x:y:z=1:2:4, 2:2:5, 1:2:5, 1:4:9.

Abstract: A low loss high-frequency dielectric ceramic composition for sintering at a low temperature and method of manufacturing the same which is characterized in that excellent dielectric properties such as a much lower sintering temperature and higher quality coefficient and dielectric constant, compared to conventional high-frequency ceramic composition, a stabilized temperature coefficient, and a temperature compensating property varied according to a composition, are implemented using a low-priced material such as ZnO—MO (M═Mg, Co, Ni)—TiO2. In addition, Ag, Cu, an alloy thereof, or an Ag/Pd alloy can be used as an internal electrode. Thus, the composition of the present invention can be used as a dielectric material for all sorts of high-frequency devices, such as a stacked chip capacitor, stacked chip filter, stacked chip capacitor/inductor composite device and module, low temperature sintered substrate, resonator or filter and ceramic antenna.

Abstract: Provided is a piezoelectric ceramic capable of improving its piezoelectric properties. The piezoelectric ceramic comprises a rhombohedral perovskite structure compound such as (Na0.5Bi0.5)TiO3, a tetragonal perovskite structure compound such as BaTiO3 and (K0.5Bi0.5)TiO3 and an orthorhombic perovskite structure compound such as NaNbO3, KNbO3 and CaTiO3, or the rhombohedral perovskite structure compound, the tetragonal perovskite structure compound and a cubic perovskite structure compound such as SrTiO3. Three kinds of perovskite structure compounds having different crystal structures are comprised, so that the piezoelectric properties can be improved. The three kinds of compounds may perfectly form a solid solution or not.

Abstract: Disclosed is a nonreducible dielectric composition. Provided is a highly reliable TC based dielectric composition prepared by adding a sintering additive having excellent qualities to a conventional (Ca1-xSrx)m(Zr1-yTiy)O3 based dielectric composition, so that it can be sintered under a reducing atmosphere to be used in formation of a nickel electrode, can be sintered at a low temperature of less than 1,250° C., and has a small dielectric loss and a high resistivity. The composition of the present invention includes a nonreducible dielectric composition comprising a main component expressed by the general formula, (Ca1-xSrx)m(Zr1-yTiy)O3, which has the ranges of 0≦x≦1, 0.09≦y≦0.35, and 0.7≦m≦1.05; and 0.

Abstract: A nonreducing dielectric ceramic comprising a (Sr, Ca)(Ti, Zr)O3-based perovskite principal crystal phase containing 55 mole percent or more of SrTiO3 and whose powder CuK&agr; X-ray diffraction pattern exhibits a ratio of less than 5% of the maximum peak intensity of the accessory crystal phases being the other crystal phases to the intensity of the maximum peak of the perovskite crystal phase, which is present at 2&thgr;=25° to 35°. This strontium titanate-based nonreducing dielectric ceramic has a high relative dielectric constant of 150 or more, a low third-order harmonic distortion ratio, and an excellent reliability in a high temperature-loading test. Accordingly, it is advantageously used for forming dielectric ceramic layers of a monolithic ceramic capacitor.