A composite ceramic including: a lithium garnet major phase; and a grain growth inhibitor minor phase, as defined herein. Also disclosed is a method of making composite ceramic, pellets and tapes thereof, a solid electrolyte, and an electrochemical device including the solid electrolyte, as defined herein.

A multilayer ceramic capacitor that includes a ceramic body including a stack of a plurality of dielectric layers and a plurality of first and second internal electrodes; and first and second external electrodes provided at each of both end faces of the ceramic body. Each of the plurality of dielectric layers contain Ba, Ti, P and Si. The plurality of dielectric layers include an outer dielectric layer located on an outermost side in the stacking direction; an inner dielectric layer located between the first and second internal electrodes; and a side margin portion in a region where the first and second internal electrodes do not exist. In at least one of the outer dielectric layer, the inner dielectric layer and the side margin portion, the P and the Si segregate in at least one of grain-boundary triple points of three ceramic particles.

A method of producing, from a continuous or discontinuous (e.g., chopped) carbon fiber, partially to fully converted metal carbide fibers. The method comprises reacting a carbon fiber material with at least one of a metal or metal oxide source material at a temperature greater than a melting temperature of the metal or metal oxide source material (e.g., where practical, at a temperature greater than the vaporization temperature of the metal or metal oxide source material). Additional methods, various forms of carbon fiber, metal carbide fibers, and articles including the metal carbide fibers are also disclosed.

There is provided a dielectric ceramic composition including a base powder, wherein the base powder includes: a first major component represented by BaTiO.sub.3, a second major component represented by (Na, K)NbO.sub.3, and a third major component represented by (Bi, Na)TiO.sub.3. The base powder is represented by xBaTiO.sub.3-y(Na, K)NbO.sub.3-z(Bi, Na)TiO.sub.3, where x+y+z=1, and x, y, and z are represented by mol, and x, y and z satisfy 0.5≦x≦0.97, 0.01≦y≦0.48, and 0.02≦z≦0.2, respectively. In certain embodiments, the base powder is be represented by xBaTiO.sub.3-y(Na.sub.0.5K.sub.0.5)NbO.sub.3-z(Bi.sub.0.5Na.sub.0.5)TiO.sub.3.

A ceramic composite material and a method for producing same. The ceramic composite material has a ceramic matrix comprising zirconium oxide and at least one secondary phase dispersed therein. The matrix is composed of zirconium oxide as at least 51 vol.-% of composite material, and the secondary phase is in a proportion of 1 to 49 vol.-% of composite material, wherein 90 to 99% of the zirconium oxide is present in the tetragonal phase based on the total zirconium oxide portion. The tetragonal phase of the zirconium oxide is stabilized by at least one member selected from the group consisting of chemical stabilization and mechanical stabilization. The ceramic composite is damage-tolerant.

A ceramic electronic component includes a multilayer chip including a multilayer structure, which includes ceramic dielectric layers and internal electrode layers that are alternately stacked, and cover layers respectively disposed on top and bottom faces of the multilayer structure in a first direction in which the dielectric layers and the internal electrode layers are alternately stacked, wherein each of the cover layers includes a relatively high porous section and a first relatively less porous section having a pore ratio less than a pore ratio of the relatively high porous section, the relatively high porous section laterally spreading and spanning an entire length of the cover layer in a second direction orthogonal to the first direction, the pore ratio of the relatively high porous section being 1% or greater, the first relatively less porous section being interposed between the relatively high porous section and the multilayer structure.

A method for producing a multilayer ceramic capacitor that includes preparing a dielectric ceramic material by mixing a perovskite compound, a Re compound, a Mn compound, a Mg compound, and a Si compound. The perovskite compound contains Ba and Ti and has 1.2×10.sup.15 or more and 4.5×10.sup.15 or less Ba vacancies per gram. Re in the Re compound is at least one element selected from Y, Gd, Tb, Dy, Ho, Er, and Yb. Green sheets containing the dielectric ceramic material are then formed. Inner electrode patterns are then formed on some of the green sheets. An unsintered capacitor body is then formed by stacking the green sheets, some of which have the inner electrode patterns formed thereon. Sintering of the unsintered capacitor body is then conducted.

A dielectric ceramic composition and a multilayer ceramic capacitor comprising the same are provided. The dielectric ceramic composition includes a BaTiO.sub.3-based base material main ingredient and an accessory ingredient, where the accessory ingredient includes dysprosium (Dy) and cerium (Ce) as first accessory ingredients. A total content of Dy and Ce is greater than 0.25 mol % and equal to or less than 1.0 mol % based on 100 mol % of the base material main ingredient.

The present invention provides a zirconia sintered body that has less excess material to be removed when making a prosthesis by milling, providing a reduction of work time, more durability for a working tool, and a faster treatment for patients, and that undergoes little deformation during firing, and provides enhanced aesthetics. The present invention relates to a columnar zirconia sintered body having a base and a side face, the base having a surface shape that is neither square nor rectangular but has at least one straight portion.

The invention relates to a refractory product, a batch for producing the product, a method for producing the product, and a use of the refractory product.