Abstract: In order to provide a dielectric composition having high density even when fired at a relatively low temperature, the main component of a dielectric composition includes tantalum and at least one of barium or strontium, and the subcomponent of the dielectric composition includes at least one element selected from the group consisting of vanadium, titanium, and aluminum.

Abstract: A multilayer ceramic capacitor includes: a ceramic body in which dielectric layers and first and second internal electrodes are alternately stacked; and first and second external electrodes formed on an outer surface of the ceramic body and electrically connected to the first and second internal electrodes, respectively. In a microstructure of the dielectric layer, dielectric grains are divided by a dielectric grain size into sections each having an interval of 50 nm, respectively, a fraction of the dielectric grains in each of the sections within a range of 50 nm to 450 nm is within a range of 0.025 to 0.20, and a thickness of the dielectric layer is 0.8 ?m or less.

Abstract: A polycrystalline ceramic solid and a method for producing a polycrystalline ceramic solid are disclosed. In an embodiment a polycrystalline ceramic solid includes a main phase with a composition of the general formula: (1-y)Pba(MgbNbc)O3-e+yPbaTidO3 with 0.055?y?0.065, 0.95?a?1.02, 0.29?b?0.36, 0.63?c?0.69, 0.9?d?1.1, and 0?e?0.1, and optionally one or more secondary phases, wherein, in each section through the solid, a proportion of the secondary phases relative to any given cross-sectional area through the solid is less than or equal to 0.5 percent, or wherein the solid is free of the secondary phases.

Abstract: A dielectric film comprises a complex oxide represented by a general formula xAO-yBO-zC2O5 as a main component, wherein A is at least one selected from barium, calcium and strontium, B is at least one selected from magnesium and zinc, C is at least one selected from niobium and tantalum, x, y and z satisfy relations: x+y+z=1.000, 0.375?x?0.563, 0.250?y?0.500, and x/3?z?(x/3)+1/9, and in an X-ray diffraction chart of the dielectric film, a diffraction peak intensity of a (211) plane of the complex oxide or a diffraction peak intensity of a (222) plane of the complex oxide is larger than a diffraction peak intensity of a (110) plane of the complex oxide.

Abstract: A dielectric film comprises a complex oxide represented by a general formula xAO-yBO-zC2O5 as a main component, wherein A is at least one selected from barium, calcium and strontium, B is at least one selected from magnesium and zinc, C is at least one selected from niobium and tantalum, x, y and z satisfy relations: x+y+z=1.000, 0.375?x?0.563, 0.250?y?0.500, and x/3?z?(x/3)+1/9, and a full width at half maximum of a diffraction peak of a (110) plane of the complex oxide is 0.40° or more in an X-ray diffraction chart of the dielectric film.

Abstract: A dielectric composition includes: a base material powder including (Ca1-xSrx) (Zr1-yTiy)O3 (0<x?0.7, 0<y?0.03); a first subcomponent including at least one selected from the group of an oxide of manganese (Mn) and a carbonate of manganese (Mn); a second subcomponent including at least one selected from the group of an oxide of yttrium (Y) and a carbonate of yttrium (Y), where a content of the second subcomponent is within a range from 2 to 3 mol, based on 100 mol of the base material powder; and a third subcomponent including at least one selected from the group of an oxide of silicon (Si) and a carbonate of silicon (Si), and an electronic component uses the same.

Abstract: Disclosed are embodiments of tungsten bronze crystal structures that can have both a high dielectric constant and low temperature coefficient, making them advantageous for applications that experience temperature changes and gradients. In particular, tantalum can be substituted into the crystal structure to improve properties. Embodiments of the material can be useful for radiofrequency applications such as resonators and antennas.

Abstract: A low temperature co-fired ceramic powder has a chemical composition of xR2O-yR?O-zM2O3-wM?O2, wherein R is Li, Na and/or K, R? is Mg, Ca, Sr, Ba, Zn and/or Cu, M is B, Al, Ga, In, Bi, Nd, Sm, and/or La, M? is Si, Ge, Sn, Ti, and/or Zr, x?0, y?0, z?20%, w?15%, and x+y+z+w=1. The preparation method comprises: weighing constituent powders according to the composition of the ceramic powder, and uniformly mixing these powders as a raw material powder; and presintering the raw material powder in a muffle furnace followed by grinding, the presintering comprising gradiently heating the raw material powder to a maximum temperature of 950° C. by first rising to 350-450° C. and staying thereat for a period, then staying at intervals of 50-100° C. for a period.

Abstract: A piezoelectric material is expressed as a mixed crystal including a first component formed of a complex oxide having a perovskite structure and a rhombohedral structure and containing Bi in an A-site and Fe in a B-site, a second component formed of a complex oxide having a perovskite structure and a tetragonal structure and containing Ba in an A-site and Ti in a B-site, and a third component formed of a complex oxide having a perovskite structure and a tetragonal structure and containing Bi and K in an A-site and Ti in a B-site.

Abstract: The present invention relates to an energy harvester device comprising an elongate resonator beam extending between first and second ends. A base connected to the resonator beam at the first end with the second end being freely extending from the base as a cantilever. A mass is attached to the second end of the elongate resonator beam. The elongate resonator beam comprises either: (1) a first oxide layer on a first piezoelectric stack layer over a cantilever layer on a second oxide layer over a second piezoelectric stack layer on a third oxide layer or (2) a first oxide layer on a first piezoelectric stack layer over a second oxide layer on a cantilever layer over a third oxide layer on a second piezoelectric stack over a fourth oxide layer. Also disclosed is a system comprising an electrically powered apparatus and the energy harvester device, as well as methods of making and using the energy harvester.

Abstract: A mold (30), which has a first region (10) comprising an electroceramic material and a second region (20) comprising a structural ceramic material, is provided. A heating device with this mold is also specified. Furthermore, a method for producing a mold is provided.

Abstract: The object of the present invention is to provide an embedding material composition for casting that makes it possible to conduct a favorable casting in the case where casting is conducted using a resin pattern that is different from a conventional wax pattern in disappearance temperature and disappearance behaviors through “rapid heating” excellent in treatment efficiency. The present invention relates to an embedding material composition for casting not using a heat-expandable refractory material as a main component, comprising: a binder; and a non-heat-expandable refractory material having an average particle diameter of 5 to 20 ?m as main components, in which a content of the binder is 25 to 40 parts by mass and a content of the non-heat-expandable refractory material is 60 to 75 parts by mass in the case where the total amount of the main components is 100 parts by mass, and the present invention also relates to a casting process using the embedding material composition for casting.

Abstract: A permanent filter for a medical sterilization container is provided. The permanent filter is made from a ceramic. The ceramic is made from globular substrate grains. A medical sterilization container is also provided, in particular for receiving and storing objects to be sterilized, having a container bottom part and a container top part for closing the container bottom part in a closed position of the sterilization container. At least one of the container bottom part and the container top part have a gas exchange orifice, which is closed with a permanent filter. The permanent filter is made from a ceramic and the ceramic is made from globular substrate grains. In addition, a method is provided for producing a permanent filter for a medical sterilization container. The permanent filter is produced from a ceramic material by sintering. Globular substrate grains are used as the ceramic material.

Abstract: There are provided a dielectric composition and a preparation method thereof, the dielectric composition including: a first perovskite powder for a core represented by ABO3: and a second perovskite powder for a shell represented by ABO3, having an average particle diameter corresponding to ? to 1/10 of an average particle diameter of the first perovskite powder, and included in an amount of 1 to 70 parts by weight with respect to 100 parts by weight of the first perovskite powder, wherein particles of the second perovskite powder have pores having a volume fraction of 3 to 50 vol % therein. According to the present invention, there are provided a dielectric composition having excellent dielectric characteristics and electrical characteristics, and a preparation method thereof.

Abstract: A liquid composition is provided for forming a thin film in the form of a mixed composite metal oxide in which a composite oxide B containing copper (Cu) and a composite oxide C containing manganese (Mn) are mixed into a composite metal oxide A represented with the general formula: Ba1-xSrxTiyO3, wherein the molar ratio B/A of the composite oxide B to the composite metal oxide A is within the range of 0.002<B/A<0.05, and the molar ratio C/A of the composite oxide C to the composite metal oxide A is within the range of 0.002<C/A<0.03.

Abstract: Porous composites of acicular mullite and tialite are formed by firing an acicular mullite body in the presence of an oxide of titanium. In some variations of the process, the oxide of titanium is present when the acicular mullite body is formed. In other variations, the oxide of titanium is applied to a previously-formed acicular mullite body. Surprisingly, the composites have coefficients of linear thermal expansion that are intermediate to those of acicular mullite and tialite alone. Some of the tialite is believed to form at grain boundaries and/or points of intersection between acicular mullite needles, rather than merely coating the needles. The presence of the titanium oxide(s) during acicular mullite formation does not significantly affect the ability to produce a highly porous network of mullite needles.

Abstract: A piezoelectric ceramic is expressed by the composition formula 100[(Sr2?xCax)1+y/4Na1?yNb5?2/5zMnzO15]+?SiO2 (in the formula, 0?x<0.3, 0.1<y<0.6, 0<z<0.1 and 1<?<8) and constituted by polycrystal of tungsten bronze structure, wherein the degree of orientation of axis c of the polycrystal is 60% or more in Lotgering factor. The piezoelectric ceramic offers excellent temperature characteristics and supporting high-power driving.

Abstract: A multilayer component includes a dielectric ceramic material that can be co-sintered with a varistor ceramic to form a monolithic multilayer component according to the invention. The multilayer component therefore includes a layer of a varistor ceramic and another layer of a dielectric. Both layers can be arranged directly adjacent to one another in the multilayer component. In the multilayer component, metallizations are arranged on or between the ceramic layers. The metallizations are structured to form conductor sections and metallized areas. The metallizations form together with the ceramic layers alongside a varistor at least one further component selected from at least one of the component functions.

Abstract: A process for the preparation of a niobium compound of formula (I): D?Nb?E?O3-???(I) wherein D is an alkali metal (e.g. Li, Na, K, Rb, Cs and/or Fr), alkaline earth metal (such as Ba, Ca, Mg and/or Sr), La and/or Bi and may be present as a mixture of two or more metals; E is Ta, Sb and/or Fe and may be present as a mixture of two or more metals; ? is a positive number ? is a positive number ? is zero or a positive number ? is a number 0???0.5; and wherein the formula (I) has the perovskite or tungsten bronze structure; comprising spray pyrolising a solution, for example an aqueous solution, comprising metal (D) ions, Nb ions and if present, metal (E) ions.

Abstract: A compound having a tungsten bronze structure exhibiting a high Curie temperature, good insulating resistance and mechanical quality factor, and excellent piezoelectric properties is provided. The compound contains a tungsten bronze structure oxide represented by general formula (1): x(BaB2O6)-y(CaB2O6)-z{(Bi1/2C1/2)B2O6}??(1) where B represents at least one of Nb and Ta; C represents at least one of Na and K; x+y+z=1; x satisfies 0.2?x?0.85; y satisfies 0?y?0.5; and z satisfies 0<z?0.8.

Abstract: Dielectric ceramic composition comprising a compound shown by a general formula {A1-x(RE)2x/3}y-B2O5+y and has a tungsten bronze-type structure. In the formula, “A” is at least one selected from a group comprising Ba, Ca, Sr and Mg, “B” is at least one selected from Nb and Ta, “RE” is at least one selected from Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, and said “x” and “y” satisfies 0<x<1 and y<1.000, respectively. The dielectric ceramic composition further comprises an oxide of at least one selected from V, Mo, Fe, W, Mn and Cr.

Abstract: The present invention aims to provide an amorphous dielectric film and an electronic component in which the relative permittivity and the temperature coefficient of electrostatic capacitance can be maintained and the withstand voltage can be increased even if the dielectric film is further thinned. The amorphous dielectric film of the present invention is characterized in that it is a dielectric film composed of an amorphous composition with A-B—O as the main component, wherein A contains at least two elements selected from the group consisting of Ba, Ca and Sr, and B contains Zr. When the main component of the dielectric film is represented by (BaxCaySrz)?—B—O, x, y and z meet the conditions of 0?x?1, 0?y?1, 0?z?1, respectively, x+y+z=1 and at least any two of x, y and z are 0.1 or more. When A/B is represented by ?, 0.5???1.5.

Abstract: An infra-red reflective material is a perovskite-like multiple oxide which includes at least an alkaline-earth metal and at least one type of element selected from a group of titanium, zirconium and niobium, and further, if necessary, manganese and/or iron, an element belonging to the IIIa group of the periodic table such as aluminum and gallium, etc., or zinc, etc., has sufficient infra-red reflective power, is excellent in thermal stability and heat resistance, and does not raise concerns on safety and environmental issues. The infra-red reflective material can be produced by, for example, mixing an alkaline-earth metal compound and a titanium compound and further, if necessary, a manganese compound and/or an iron compound, a compound belonging to the IIIa group of the periodic table, or a zinc compound in predetermined amounts, and firing the mixture.

Abstract: The invention relates to a communication device using radio waves with frequencies of 800 MHz to 3 GHz, comprising a ceramic cover at least partially exposed to the external environment of the device, at least one portion of said waves passing therethrough during the use of the device, said cover being at least partially made of a sintered product having a chemical composition such as, by weight and for a total of 100%, 32%?ZrO2?95%, 1%<Y2O3+CeO2+Sc2O3+MgO+CaO, 0%?CeO2?26%, 0%?MgO?43%, 0%?CaO?37%, 0%?SiO2?41%, 0%?Al2O3?55%, 0%?TiO2?30%, 0%?lanthanide oxide, except for CeO2?50% 0%SrO?24%, o %?iAlON compounds ?50%, and other compounds ?15%.

Abstract: An insulator for spark plug with a main constituent of alumina and containing silicon includes a grain boundary phase positioned between alumina particles. The grain boundary phase contains: a group 2A element; a rare earth element; and at least one kind of zirconium, titanium, chrome, niobium, manganese, and iron (a first element). Assuming that a total amount of the rare earth element is X (mass %), a total amount of the group 2A element is Y (mass %), and a total amount of the first element is Z (mass %), the following are met: 0.40?Y/X?2.00 0.10?Z/X?0.40.

Abstract: The invention provides an artificial marble and a method for manufacturing the artificial marble. The artificial marble is manufactured using raw materials such as silica, fluorspar and one or more waste materials. The one or more waste materials are selected from a group that includes limestone, clay, magnesite and phosphate.

Abstract: Provided are aluminum titanate capable of providing a sintered body having a low coefficient of thermal expansion, a high porosity, and high mechanical strength, a production method of the same, and a sintered body of the columnar aluminum titanate. The columnar aluminum titanate has an average aspect ratio (=(number average major-axis length)/(number average minor-axis length)) of 1.5 or more and its magnesium content is preferably within the range of 0.5% to 2.0% by weight relative to the total amount of titanium and aluminum in terms of their respective oxides.

Abstract: The invention is to provide an aluminum titanate-based ceramics showing a good mechanical strength. The invention is an aluminum titanate-based ceramics obtained by firing a starting material mixture which contains a titanium element and an aluminum element, and further contains a chromium element and/or a tungsten element. Preferably, a content of a chromium source which contains the chromium element is from 0.001 to 5 parts by mass, and a content of a tungsten source which contains the tungsten element is from 0.001 to 1.0 part by mass relative to 100 parts by mass of the starting material mixture.

Abstract: A method of forming composition-modified barium titanate ceramic particulate includes mixing a plurality of precursor materials and a precipitant solution to form an aqueous suspension. The plurality of precursors include barium nitrate, titanium chelate, and a metal or oxometal chelate. The precipitant solution includes tetraalkylammonium hydroxide and tetraalkylammonium oxalate. The method further includes treating the aqueous suspension at a temperature of at least 150° C. and a pressure of at least 200 psi, and separating particulate from the aqueous suspension after treating.

Abstract: A dielectric ceramic composition comprising a compound shown by a general formula {A1?x(RE)2x/3}y-D2O5+y having tungsten bronze-type structure and an oxide of “M”. “A” is at least one selected from Ba, Ca, Sr and Mg, “D” is at least one selected from Nb and Ta, “RE” is at least one selected from Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, “x” and “y” satisfies 0<x<1 and y>0, respectively and said “M” is at least one selected from Al, Si, B and Li. It is preferable to further comprise Mg oxide.

Abstract: Dielectric ceramic composition comprising a compound shown by a general formula {A1?x(RE)2x/3}y-B2O5+y and has a tungsten bronze-type structure. In the formula, “A” is at least one selected from a group comprising Ba, Ca, Sr and Mg, “B” is at least one selected from Nb and Ta, “RE” is at least one selected from Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, and said “x” and “y” satisfies 0<x<1 and y>1.000, respectively. The dielectric ceramic composition further comprises an oxide of at least one selected from V, Mo, Fe, W, Mn and Cr.

Abstract: Ceramic materials comprising charge-compensating dopants and related methods. In some embodiments, the materials may comprise dopants such as Y2O3, Gd2O3, Nb2O5, and/or Ta2O5. Some embodiments may comprise a molar concentration of Y2O3 and/or Gd2O3 that is at least approximately equal to the molar concentration of Nb2O5 and/or Ta2O5. Certain embodiments and implementations may comprise particular, unique concentrations or concentration ranges of various compounds/materials in order to improve performance for use of such ceramic materials as biomedical implants.

Abstract: A framework for developing high quality factor (Q) material for electronic applications in the radio frequency range is provided. In one implementation, ceramic materials having a tungsten bronze crystal structure is modified by substituting one or more elements at one or more lattice sites on the crystal structure. The substitute elements are selected based on the ionic radius and other factors. In other implementations, the modified ceramic material is prepared in combination with compositions such as rutile or a perovskite to form a orthorhombic hybrid of perovskite and tetragonal tungsten bronze.

Abstract: Ceramic material of the general formula: [SE1-xMIIx][Cr1-y-zRyLz]O3, wherein SE stands for one or more rare earth metals, MII stands for one or more metals of the oxidation state +II, L stands for Al and/or Ga, R stands for one or more metals selected from Fe, Zn, Ge, Sn, and it holds that: 0<x<1; 0<y<1; 0.5<z<1; y+z<1.

Abstract: A transparent dielectric composition comprising tin, oxygen and one of aluminum or magnesium with preferably higher than 15% by weight of aluminum or magnesium offers improved thermal stability over tin oxide with respect to appearance and optical properties under high temperature processes. For example, upon a heat treatment at temperatures higher than 500 C, changes in color and index of refraction of the present transparent dielectric composition are noticeably less than those of tin oxide films of comparable thickness. The transparent dielectric composition can be used in high transmittance, low emissivity coated panels, providing thermal stability so that there are no significant changes in the coating optical and structural properties, such as visible transmission, IR reflectance, microscopic morphological properties, color appearance, and haze characteristics, of the as-coated and heated treated products.

Abstract: Disclosed herein are a dielectric composition including a compound represented by the following Chemical Formula A5-xB10O30-x (A necessarily includes Ba, and a portion of Ba is substituted by at least one selected from Sr and Ca; B necessarily includes Nb, and a portion of Nb is substituted by at least one selected from Ta and V; and x satisfies the following equation: 1<x<5) as a main component and a multilayered ceramic capacitor including the same as a dielectric layer.

Abstract: Body made of a ceramic material, the body having as an integral part thereof a surface region reaching from the surface of the body down to a predetermined depth. According to the invention, the surface region is enriched with a magnesium component thereby forming a hydrophilic surface area.

Abstract: A high-frequency and low-dielectric-constant ceramic dielectric material matched with nickel internal electrode and a method for producing capacitor using same. The ceramic dielectric material consists of main crystalline phase, modifying additive and sintering flux. The main crystalline phase is MgZrxSi(1?x)O3, wherein 0.05?x?0.15. The modifying additive is one or more of MnO2, Al2O3, CaO, Bi2O3 and TiO2, and the sintering flux is one or more of B2O3, SiO2, ZnO, Li2O, K2O and BaO. The ceramic dielectric material has good uniformity, and excellent dielectric properties, meets the requirements of COG characteristics in EIA standard, and meets the environmental requirements. The ceramic dielectric material can be sintered under the reducing atmosphere and can be matched with nickel electrodes. The chip multilayer ceramic capacitor made of the ceramic dielectric material and nickel internal electrodes has stable performance.

Abstract: The present application is directed to a zirconia toughened alumina body and process for making the body. The process involves combining tetragonally stabilized ZrO2 nanoparticles, Mg(OH)2 particles and alumina powder into a mixture. All particles of the mixture are milled, formed into a green compact and then sintered. The final composition of the body includes ?-Al2O3 toughened with 0.5 to 2.5 weight percent ZrO2 in a stabilized tetragonal form and 0.03 to 0.1.0 weight percent MgO. The composition results in an Al2O3 body with a density less than 4.0 g/cc and strength greater than 50 kpsi.

Abstract: Disclosed are ceramic bodies comprised of composite cordierite aluminum magnesium titanate ceramic compositions and methods for the manufacture of same.

Abstract: An oxide sintered body having zinc oxide as a main component and containing magnesium, and a transparent conductive substrate are provided, and an oxide sintered body having zinc oxide and magnesium, wherein content of magnesium is from 0.02 to 0.30 as atom number ratio of Mg/(Zn+Mg); an oxide sintered body having zinc oxide, magnesium, gallium and/or aluminum, wherein content of gallium and/or aluminum is over 0 and equal to or lower than 0.09 as atom number ratio of (Ga+Al)/(Zn+Ga+Al), and content of magnesium is from 0.02 to 0.30 as atom number ratio of Mg/(Zn+Ga+Al+Mg); a target obtained by processing these oxide sintered bodies; and a transparent conductive film formed on a substrate by a sputtering method or an ion plating method, by using this target.

Abstract: Provided is an anti-reductive high-frequency ceramic dielectric material sintered at low temperature and matched with copper internal electrode, which can be used for producing multi-layer ceramic capacitor with a copper internal electrode. The ceramic dielectric material consists of main crystalline phase, modifying additive and sintering flux. The formula of the main crystalline phase is MgxBa(1-x)ZrySi(1-y)O3, wherein 0.8?x?0.95, 0.05?y?0.2. The modifying additive is one or more of MnO2, CaO, Li2O, Bi2O3 and TiO2, and the sintering flux is one or more of B2O3, SiO2, ZnO, CuO, K2O and BaO. The ceramic dielectric material meets the requirements of COG characteristics by EIA standard, has such characteristics as uniform particle size distribution, high dispersiveness, optimized molding process, eco-friendliness and excellent dielectric properties.

Abstract: Disclosed is a refined white ceramic material, which belongs to the field of ceramic materials for component packaging, and comprises the following raw materials by weight in percentage: aluminum oxide 87-93, magnesium oxide 0.8-5, silicon dioxide 1-6, calcium oxide 0.6-4, titanium dioxide 0.01-0.5, and zirconium dioxide 0.5-3. The method for preparing same comprises: (1) washing aluminum oxide grinding balls and a ball-milling tank, and drying for later use; (2) weighing a solvent NP-10 of 0.5-4 by weight in percentage, and adding the solvent into the ball-milling tank; (3) weighing raw materials, adding the raw materials into the ball-milling tank, and performing ball milling for 72±0.5 h. By means of the refined white ceramic material of the present invention, the obtained ceramic grains have even sizes, small surface roughness, and high fracture resistance performance of ceramic body.

Abstract: Provided is an oriented piezoelectric material with satisfactory sintering property free of Pb that is a hazardous substance, and a water-soluble alkaline ion, and a production method therefor. To this end, provided is a compound, including a tungsten bronze structure metal oxide, in which: the tungsten bronze structure metal oxide contains at least metal elements of Ba, Bi, Ca, and Nb, the metal elements satisfying the following conditions in terms of molar ratio; and has a C-axis orientation. The compound shows Ba/Nb=a: 0.363<a<0.399, Bi/Nb=b: 0.0110<b<0.0650, and Ca/Nb=c: 0.005<c<0.105. The tungsten bronze structure metal oxide preferably includes (1?x).Ca1.4Ba3.6Nb10O30?x.Ba4Bi0.67Nb10O30 (0.30?x?0.95).

Abstract: Provided in a dielectric ceramic having flat capacitance characteristics and a high dielectric constant, and a multilayer ceramic electronic component (such as a multilayer ceramic capacitor) in which the dielectric ceramic is used. A multilayer ceramic capacitor includes a multilayer body having a plurality of dielectric ceramic layers and a plurality of internal electrodes, and external electrodes formed on the multilayer body. The composition of the multilayer body includes any of a bismuth layered compound containing Sr, Bi and Ti, a bismuth layered compound containing Sr, Bi and Nb, and a bismuth layered compound containing Ca, Bi and Ti as a primary ingredient, Bi and at least one of Cu, Ba, Zn and Li, and satisfies the conditions that if the Ti content is 400 molar parts or the Nb content is 200 molar parts, then (Bi content-Ti content) or (Bi content-Nb content) is equal to or greater than 1 molar part and less than 7.

Abstract: The present disclosure relates to a dental ceramic article comprising ceramic components, the ceramic components having ZrO2 and Al2O3 and at least one component comprising Mn, Er or mixtures thereof, Al2O3 being present in an amount below about 0.15 wt.-% with respect to the weight of the ceramic article. The present disclosure relates also to kit of parts comprising a ceramic article and a colouring solution and processes for producing a dental ceramic article.

Abstract: A sintered particle has the following chemical analysis, as percentages by weight: ZrO2 partially stabilized with CeO2 and Y2O3: complement to 100%; Al2 10%-60%; additive selected from CaO, a manganese oxide, La2O3, SrO, BaO, and mixtures thereof: 0.2%-6; the quantity of CaO being less than 2%; impurities: <2%; the zirconia being stabilized with CeO2 and Y2O3 present in quantities such that, as molar percentages based on the sum of ZrO2, CeO2 and Y2O3: CeO2: 6 mol %-11 mol %; and Y2O3: 0.5 mol %-2 mol %; the particle being obtained by sintering at a sintering temperature higher than 1300° C., the sintering temperature being higher than 1400° C. if the additive is CaO or if the molar CeO2 content is in the range 10% to 11%.

Abstract: New photocatalytic product comprising compounds of titanium integrated with limestone. The product is obtained by reacting limestone with a suitable precursor of titanium dioxide in a basic solution, followed by accurately washing the solid obtained, drying it and calcining it. A composite is obtained containing limestone, titanium dioxide and calcium titanate. The composite thus obtained, used as such or in mixture with other components, has shown an unexpectedly high photocatalytic activity.

Abstract: 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.

Abstract: 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.