Abstract: The composite dielectric of the present invention contains an aromatic liquid crystal polyester and a dielectric ceramic powder arranged in the aromatic liquid crystal polyester, wherein the dielectric ceramic powder exhibits a Q value greater than 650 at a frequency of 1 GHz by perturbation. A wiring board comprising a composite dielectric sheet made of a composite dielectric having such a characteristic exhibits a high dielectric constant and a low dielectric dissipation factor, thereby yielding less transmission loss, and thus can favorably be used in electronic instruments driven in high-frequency regions.

Abstract: A dielectric ceramic is obtained by the steps of obtaining a reaction product composed of a barium titanate base composite oxide represented by the general formula (Ba1?h?i?mCahSriGdm)k(Ti1?y?j?nZryHfjMgn)O3, in which 0.995?k?1.015, 0?h?0.03, 0?i?0.03, 0.015?m?0.035, 0?y<0.05, 0?j<0.05, 0?(y+j)<0.05, and 0.015?n?0.035 hold; mixing less than 1.5 moles of Ma (Ba or the like), less than 1.0 mole of Mb (Mn or the like), and 0.5 to 2.0 moles of Mc (Si or the like) with respect to 100 moles of the reaction product; and firing the mixture thus obtained. This dielectric ceramic has superior humidity resistance, satisfies the F characteristic of the JIS standard and the Y5V characteristic of the EIA standard, has a relative dielectric constant of 9,000 or more, and has superior high-temperature reliability.

Abstract: Disclosed herein is a method of manufacturing a multilayered ceramic capacitor by a spin coating process, and a multilayered ceramic capacitor obtained by the above method. The method of the current invention provides a plurality of dielectric layers formed by spin coating, in which the process of coating the dielectric layer and the process of printing the inner electrode can be provided as a single process. Therefore, the thickness of the dielectric layer is easily controlled while the dielectric layer is formed to be thin. Further, since the dielectric layers and the inner electrodes are formed successively, the processes of separating and layering the dielectric layers, and the process of compressing the ceramic multilayered body can be omitted. Thereby, the ceramic multilayered body need not be compressed, and thus, a pillowing phenomenon does not occur in the multilayered ceramic capacitor.

Abstract: A piezoelectric film is provided having good piezoelectric properties. The piezoelectric film is represented by the following general formula: A1?bB1?aXaO3 wherein A contains Pb; B is at least one of Zr and Ti; X is at least one of V, Nb, Ta, Cr, Mo and W; a satisfies 0.05?a?0.3; and b satisfies 0.025?b?0.15.

Abstract: A piezoelectric/electrostrictive ceramic composition containing, as a major component, a Pb(Mg1/3Nb2/3)O3—PbTiO3—PbZrO3 ternary solid solution system composition and further containing Ni in an amount of 0.05 to 3.0% by mass in terms of NiO and Si in an amount of 0.003 to 0.01% by mass in terms of SiO2. The piezoelectric/electrostrictive ceramic composition can constitute a piezoelectric/electrostrictive body or a piezoelectric/electrostrictive portion both having an excellent piezoelectric/electrostrictive property and durability even under high-temperature and highly humid conditions.

Abstract: A ceramic fuse housing is provided for surface mount circuit protectors, wherein a selectively destructible fuse is at least partially retained within the fuse housing. The fuse housing being formed of between 80% to 90% alumina and 20% to 10% zirconia, wherein 5% to 25% of the zirconia is in a tetragonal phase.

Abstract: The present invention provides a process for preparing a sintered body comprising as a basic component aluminum magnesium titanate represented by the composition formula: MgxAl2(1?x)Ti(1+x)O5 wherein the value of x is 0.1?x<1. The process comprises a step of sintering a formed product from a raw material mixture comprising 100 parts by weight, calculated on an oxide basis, of a mixture comprising a Mg-containing compound, an Al-containing compound and a Ti-containing compound at the same metal component ratio as the metal component ratio of Mg, Al and Ti in the above composition formula, and 1–10 parts by weight of an alkali feldspar represented by the composition formula: (NayK1?y)AlSi3O8 wherein the value of y is 0?y?1.

Abstract: A piezoelectric film is provided that is represented by the following general formula: Pb1?b[((X1/3Nb2/3)1?cB?c)1?aYa]O3 wherein X is at least one of Mg, Zn and Ni; B? is at least one of Zr, Ti and Hf; Y is at least one of V, Nb, Ta, Cr, Mo and W; a satisfies 0.05?a<0.30; b satisfies 0.025?b?0.15; when X is Mg, c satisfies 0.25?c?0.35; when X is Ni, c satisfies 0.30?c?0.40; and when X is Zn, c satisfies 0.05?c?0.15.

Abstract: A crucible comprising Al2O3 and at least one selected from rare earth oxides inclusive of Y2O3 as main components and characterized by firing at 500–1,800° C., the distribution of the rare earth oxide at a higher proportion in a fine particle portion having a particle size of up to 0.5 mm than in a coarse particle portion having a particle size in excess of 0.5 mm, and the substantial absence of the reaction product of the rare earth oxide with Al2O3 is suitable for the melting of a rare earth alloy.

Abstract: This invention provides a piezoelectric ceramic composition that does not contain lead, can be sintered at a normal pressure and has a high electro-mechanical coupling coefficient and a small dielectric loss, its production method, and a piezoelectric device utilizing the piezoelectric ceramic composition. The invention relates to a piezoelectric composition containing a compound expressed by the general formula {Lix(K1-yNay)1-x}(Nb1-zTaz)O3, each of x, y and z respectively falling within composition range of 0?x?0.2, 0?y?1.0 and 0?z?0.4, as its main component, and further containing nickel or a nickel-containing compound. To provide a piezoelectric device that does not contain lead, can be sintered at a normal pressure and has a high electro-mechanical coupling coefficient Kp and a small dielectric loss, the piezoelectric ceramic composition of the invention is expressed by the general formula {Lix(K1-yNay)1-x}(Nb1-z-nTaz(Mn0.5W0.

Abstract: The present invention provides a raw material composition for preparing a sintered body of aluminum titanate, the composition comprising (i) 100 parts by weight of a mixture comprising 40 to 50 mol % of TiO2 and 60 to 50 mol % of Al2O3, (ii) 1 to 10 parts by weight of an alkali feldspar represented by the formula: (NaxK1?x)AlSi3O8 (0?x?1), and (iii) 1 to 10 parts by weight of at least one Mg-containing component selected from the group consisting of a Mg-containing oxide with spinel structure, MgCO3 and MgO, and a process for preparing a sintered body of aluminum titanate comprising sintering a formed product prepared from the raw material composition at 1300 to 1700° C. According to the present invention, a sintered body of aluminum titanate having high mechanical strength and ability to be stably used at high temperatures, as well as its inherent properties of low coefficient of thermal expansion and high corrosion resistance, can be obtained.

Abstract: There is provided a process of preparing low-temperature sintered microwave dielectric ceramics, prepared by a process comprising co-precipitating Nb and Bi or Zn in an aqueous basic solution to obtain a BiNbO4 or Zn3Nb2O8 precursor powder, thermally decomposing the powder to obtain BiNbO4 or Zn3Nb2O8 powder, adding CuO and V2O5, pulverizing and sintering the mixture, which produces ceramics having small dielectric losses (Q·f0>15,000 GHz) and high dielectric constant (k=20–45) at microwave frequencies by sintering at a low temperature of 700 to 750° C. Thus, the microwave dielectric ceramics prepared in accordance with the present invention can be advantageously used in multi-layer ceramic packaging such as filter planar antenna, microwave oscillator, etc., which comprise base metals such as silver (Ag) and copper (Cu) as an internal electrode.

Abstract: This invention relates to a piezoelectric ceramic of the formula Pb(1?z)Mz(Mg1/3Nb2/3)x(ZryTi1?y)1?xO3 where M can be either Sr or Ba or both and x is in between about 0.1 and about 0.7, y is between about 0.2 and about 0.7, and z is between about 0.02 and about 0.1 and to method for preparing the piezoelectric ceramic. The piezoelectric ceramic is provided as a composite perovskite structure. Additional materials or dopants can be added to the piezoelectric ceramic of the present invention. Example of dopants that can be added to the piezoelectric ceramic include, but are not limited to: MnO2, Ni2O3, TeO3, TeO2, MoO3, Nb2O5, Ta2O5, CoCO3, and Y2O3. The piezoelectric ceramics of the present invention can be used to fabricate piezoelectric elements for a wide variety of devices that can be fabricated to exhibit high power applications including miniaturized displacement elements, buzzers, transducers, ultrasonic sensors and ultrasonic generators, and the like.

Abstract: Round and spherical titanium dioxide scouring media and a method for producing the media are disclosed. The scouring media is effective in removing titanium dioxide buildup on the walls of a titanium dioxide reaction vessel. The method consists of forming green titanium dioxide pellets in a high intensity mixer by mixing commercially available titanium dioxide dust, water and a surfactant. The high intensity mixer produces substantially round, and spherical green pellets which are subsequently sized and sintered in a kiln to form round and spherical titanium dioxide sintered pellets that are suitable as a scouring media. The high intensity mixer allows the operator to closely control the size and shape of the pellets during the forming process to produce substantially round and spherical green pellets. Because the sintered titanium dioxide pellets are substantially round and spherical in shape, they are much less abrasive to the walls of the reaction vessel.

Abstract: A piezoelectric ceramic composition not containing lead, able to be sintered at ordinary pressure, and superior to the past in at least one of the properties unique to piezoelectric ceramic compositions such as the piezoelectric d31 constant, that is, a piezoelectric ceramic composition having a compound of a general formula {Lix(K1-yNay)1-x}(Nb1-z-wTazSbw)O3 where x, y, z, and w are in the ranges of 0?x?0.2, 0?y?1, 0<z?0.4, and 0<w?0.2 as a main ingredient, where the piezoelectric ceramic composition contains at least one metal element selected from (1) palladium, silver, gold, ruthenium, rhodium, rhenium, osmium, iridium, and platinum, (2) nickel, iron, manganese, copper, and zinc, or (3) magnesium, calcium, strontium, and barium as an added element, and a method of production of the same and a piezoelectric element and dielectric element utilizing that piezoelectric ceramic composition.

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: 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: 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: 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 ceramic body comprising a crystal phase of aluminum titanate in an amount of 50 to 95% by weight, and a glass phase in an amount of 5 to 50% by weight. The inventive ceramic body may include a second crystal phase, for example mullite in an amount of up to 40% by weight. The glass is an aluminosilicate including, in weight percent on an oxide basis, of 50–90 SiO2, 1–25 Al2O3, 0.5–10 TiO2, 0.5–20 R2O, where R is selected from the group consisting of Li, Na, K, Ru, Cs, Fr, and 0.5–20 R?O, where R? is selected from the group consisting of Be, Mg, Ca, Ba, Ra, and wherein the ceramic body includes not more than 2% by weight Fe2O3.

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: The present invention relates to an icosahedral, quasicrystalline compound or compound present in the form of an approximant having the nominal composition: TivCrwAlxSiyOz, in which v=60-65; w=25-30; x=0-6; Y=8-15; z=8-20; and in which the atom percent of oxygen is in the range of between 8 and 15%, and that of aluminum in the range of between 2 to 5%. Due to their layered structure and ceramic intermediate layers, compounds of this type exhibit excellent properties, in particular for use as coatings for gas turbine components, such as for example, rotor blades or guide vanes.

Abstract: An ion generator with increased generation of negative ions and its method of manufacture are disclosed. For an ion generator of the present invention, a titanium oxide powder is added to an ion generator that generates negative ions.

Abstract: Disclosed is a method for making amorphous spherical particles of zirconium titanate and crystalline spherical particles of zirconium titanate comprising the steps of mixing an aqueous solution of zirconium salt and an aqueous solution of titanium salt into a mixed solution having equal moles of zirconium and titanium and having a total salt concentration in the range from 0.01 M to about 0.5 M. A stearic dispersant and an organic solvent is added to the mixed salt solution, subjecting the zirconium salt and the titanium salt in the mixed solution to a coprecipitation reaction forming a solution containing amorphous spherical particles of zirconium titanate wherein the volume ratio of the organic solvent to aqueous part is in the range from 1 to 5. The solution of amorphous spherical particles is incubated in an oven at a temperature ?100° C. for a period of time ?24 hours converting the amorphous particles to fine or ultrafine crystalline spherical particles of zirconium titanate.

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 multilayer ceramic capacitor having an internal electrode layer and a dielectric layer having a thickness of less than 2 ?m is provided, wherein the dielectric layer contains a plurality of dielectric particles, and when it is assumed that standard deviation of a particle distribution of the entire dielectric particles in the dielectric layer is ? (no unit), an average particle diameter of the entire dielectric particles in the dielectric layer is D50 (unit: ?m), and a rate that dielectric particles (coarse particles) having an average particle diameter of 2.25 times of the D50 exist in the entire dielectric particles is p (unit: %), the ? and p satisfy ?<0.130 and p<12%; by which a TC bias characteristic can be expected to be improved while maintaining various electric characteristics, particularly a sufficient permittivity, even when the interlayer dielectric layer is made thin.

Abstract: A lead zirconate titanate-based thin film is an epitaxial crystal thin film and has a chemical composition represented by the general formula Pb1-xLnxZryTi1-yO3 (wherein Ln represents any one selected from the group consisting of lanthanum, lanthanoid elements, niobium, calcium, barium, strontium, iron, manganese and tin; and 0?x<1, 0.43?y?0.65) and whose orientation is {111} (including orientations whose tilt angle from the direction perpendicular to the substrate surface is within 15°).

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: An oxide sintered body is composed mainly of indium and containing tungsten, has a resistivity of no more than 1 k?cm. The tungsten content in terms of the W/In atomic ratio is preferably at least 0.001 and no more than 0.17. The oxide sintered body comprise mainly a bixbyite structure indium oxide crystal phase containing tungsten in a solid solution and/or an indium tungstate compound crystal phase, with no tungsten oxide crystal phase present, whereby an oxide sintered body for use as a sputtering target is provided for an oxide based transparent conductive film with low resistance and excellent transmission characteristics for the infrared light region.

Abstract: A composition of a plasma display panel (PDP) is disclosed. In order to effectively reduce a jitter, the composition contains a ferroelectric transparent ceramics material.

Abstract: An aluminum titanate-based ceramic article having a composition comprising u (Al2O3—TiO2)+v (R)+w (3Al2O3—2SiO2)+x (Al2O3)+y (SiO2)+z (1.1SrO-1.5Al2O3-13.6SiO2—TiO2)+a (Fe2O3—TiO2)+b (MgO-2TiO2), where, R is SrO—Al2O3-2SiO2 or 11.2SrO-10.9Al2O3-24.1SiO2—TiO2, where u, v, w, x, y, z, a and b are weight fractions of each component such that (u+v+w+x+y+z+a+b=1), and 0.5<u?0.95, 0.01<v?0.5, 0.01<w?0.5, 0?x?0.5, 0?y?0.1, 0?z?0.5, 0<a?0.3, and 0?b?0.3. A method of forming the ceramic article is provided. The ceramic article is useful in automotive emissions control systems, such as diesel exhaust filtration.

Abstract: An electrolytic perovskite and method for synthesizing the electrolytic perovskite are described herein. Basically, the electrolytic perovskite is a solid that has an ion conductivity greater than 10?5 S/cm in a temperature range of 0–400° C., wherein the ion is Li+, H+, Cu+, Ag+, Na+ or Mg2+. For example, Li1/8Na3/8La1/4Zr1/4Nb3/4O3 (5.26×10?4 S/cm) and Li1/8K1/2La1/8NbO3 (2.86×10?3 S/cm) are two electrolytic perovskites that have been synthesized in accordance with the present invention that have a high Li+ conductivity at 20° C. Both compositions have been confirmed in experiments to conduct Ag+ and H+ ions, as well. The present invention also includes a solid proton conductor that can be formed from the electrolytic perovskite by replacing the ions located therein with protons.

Abstract: The synthesis, processing and test of improved lead zirconate titanate (PZT) precursor materials useful for making bulk, thick films and thin films of PZT are provided. PZT is an oxide ceramic extensively used for its piezoelectric properties. A variety of devices made from piezoelectric PZT are known. A soluble spin-on precursor is provided that is compatible with and soluble in non-toxic and environmentally benign solvents (including water), has high stability and long shelf life, and provides high quality PZT films.

Abstract: Provided are a piezoelectric ceramic and a piezoelectric device having a larger piezoelectric strain constant and capable of being fired at a lower temperature. A main component of PbA[(Mg1/3Nb2/3)a(Zn1/3Nb2/3)bTicZrd]O3 (a+b+c+d=1, 0.99?A?1.01, 0.15?a+b?0.5, 0.05?b?0.25, 0.2?c?0.5, 0.15?d?0.6) and 0.01 mass % to 0.8 mass % inclusive of at least one kind selected from the group consisting of Fe, Co, Ni and Cu in the form of oxide per 1 mol of the main component as a first sub-component are comprised. Thereby, a larger piezoelectric strain constant can be obtained, and a firing temperature can be reduced. In the main component, a part of Pb may be replaced with at least one kind selected from the group consisting of Ca, Sr and Ba. Further, as a second sub-component, 0.05 mass % to 1.0 mass % inclusive of at least one kind selected from the group consisting of Sb, Nb and Ta in the form of oxide per 1 mol of the main component may be comprised.

Abstract: A vapor deposited material for FPD protective film comprises a polycrystalline body, sintered body, or single crystal having a surface covered with a fluoride layer. A manufacturing device for FPD protective film comprises: a film formation section for forming a film body on one side of a substrate, and a layer formation section for forming a fluoride layer on a surface of said film body; wherein said layer formation section comprises: a layer formation chamber for housing a substrate on which said film body is formed, a gas supply mechanism for forming a fluoride layer on the surface of said film body by supplying a fluoridation agent towards said substrate in said layer formation chamber, and a substrate heating section provided in said layer formation chamber for heating said substrate.

Abstract: A ceramic material includes at least two different components. Each of the components is present in separate phases. Each of the components has a perovskite structure which contains silver in A positions and niobium or tantalum in B positions. A composition of a first component and a composition of a second component has respective permittivities TK?A and TK?B. In the ceramic material, temperature components of the permittivities TK?A and TK?B have different signs within a temperature interval.

Abstract: The invention relates to a composite material comprising silicon and titanium dioxide characterized by an enhanced thermal and hydrothermal stability of the pore structure. The composite is obtainable by precipitating titanium hydroxide from an aqueous solution containing sulfate salts and urea, followed by an hydrothermal treatment in the mother liquor, and by reacting the precipitate with a basic silica sol. The composite has a specific surface area of up to 228 m2/g for a material calcined at 800° C. for 3 hours, and is suitable for catalyzing a variety of reactions, including Claus reaction and degradation of organic impurities.

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 thermal barrier coating material formed of a highly defective cubic matrix structure having a concentration of a stabilizer sufficiently high that the oxygen vacancies created by the stabilizer interact within the matrix to form multi-vacancies, thereby improving the sintering resistance of the material. The concentration of stabilizer within the cubic matrix structure is greater than that concentration of stabilizer necessary to give the matrix a peak ionic conductivity value. The concentration of stabilizer may be at least 30 wt. %. Embodiments include a cubic matrix of zirconia stabilized by at least 30-50 wt. % yttria, and a cubic matrix of hafnia stabilized by at least 30-50 wt. % gadolinia.

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: A bismuth titanium silicon oxide having a pyrochlore phase, a thin film formed of the bismuth titanium silicon oxide, a method for forming the bismuth-titanium-silicon oxide thin film, a capacitor and a transistor for a semiconductor device including the bismuth-titanium-silicon oxide thin film, and an electronic device employing the capacitor and/or the transistor are provided. The bismuth titanium silicon oxide has good dielectric properties and is thermally and chemically stable. The bismuth-titanium-silicon oxide thin film can be effectively used as a dielectric film of a capacitor or as a gate dielectric film of a transistor in a semiconductor device. Various electronic devices having good electrical properties can be manufactured using the capacitor and/or the transistor having the bismuth-titanium-silicon oxide film.

Abstract: A PZT dielectric ceramic material is sintered at a desired low temperature to prevent deterioration of the performance of the base material. An auxiliary oxide is used that is made by adding the oxide of at least one of tungsten and molybdenum to lead oxide in the following proportions: PbOx+(WO3y+MoO3z) where x+y+z=1, 0.005<y+z<0.4 and y, z?0. 0.5 mol % to 20 mol % of this auxiliary oxide is added to a mixture of a stock material of dielectric ceramic material or its calcination having a composition of ABO3 type dielectric ceramic material where 0.9 molar ratio or more lead is included in site A assuming the proportion of site B is 1, and the material is mixed, formed and sintered. The content of tungsten and molybdenum combined is less than 0.098 mole in proportion to 1 mole of lead and the density of the dielectric ceramic material after sintering is 7.5 g/cm3 larger.

Abstract: A ceramic article is disclosed which contains aluminum, silicon, and titanium in a total amount of at least 99% by weight as reduced to the oxides (Al2O3+SiO2+TiO2) and assumes an acidic color in methyl red, an indicator of at least pKa+4.8. It can be used as a carried for a catalyst. This ceramic article is obtained by mixing an aluminum compound, a silicon compound, and a titanium compound and calcining the resultant mixture at a temperature in the range of 1,000°-2,000° C. A catalyst for preparing ethylene oxide is obtained by depositing silver and a reaction promoter on the ceramic carrier and ethylene oxide is obtained by oxidizing ethylene with a molecular oxygen-containing gas in the presence of the catalyst in vapor phase.

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 dielectric material composition including a metal oxide represented by a general formula, Y1?xM1xMn1?yM2yOm. M1 is Y, Ho, Er, Yb, Tm, or Lu. M2 is Ti, Zr, V, Mo, Mg, Cu, or Zn. X is a number of 0 to 1. Y is a number of 0 to 1. The metal oxide is of high dielectric constant and has the properties of ferroelectricity, piezoelectricity, and pyroelectricity.

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: This invention provides the novel dielectric BiCu3Ti3FeO12. BiCu3Ti3FeO12 provides good dielectric tunability and low loss over a frequency range of from 10 kHz to 10 MHz and 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: The invention relates to ceramic materials based on bismuth niobate substituted with zinc and can be used for producing multilayer high frequency thermostable ceramic condensers provided with electrodes based on an alloy which comprises Ag and Pd, and also for producing multilayer microwave films. The aim of the invention is to develop a ceramic material having a low sintering temperature sufficient for using silver-palladium electrodes having a silver content of up to 90%. Said material has an optimum dielectric permittivity and thermostability which are sufficient for producing a wide range of items based on said material. Zinc niobate ZnNb2O6 having a structure of columbite with a quantity ranging from 7.0 to 99.0, expressed in mass %, is added into a ceramic material based on the bismuth niobate substituted with zinc having a crystal-chemical formula (Bi?[ ]?)2(Zn<2+>?Nd?)2O6[ ]1,[ ] being a vacancy with a pyrochlore structure.