A ceramic subassembly manufactured by a 3D-printing process is described. The ceramic subassembly comprises a ceramic substrate having a sidewall extending to spaced apart first and second end surfaces. At least one via extends through the substrate from the ceramic substrate first end surface to the ceramic substrate second end surface. In cross-section, the via has a square-shape with rounded corners.

A method for producing dentures uses a green compact containing a mixture of ceramic powder and a binder system. A ceramic shell for dentures can be produced from the green compact and can be shaped and can be adapted to a carrier prior to a firing step below a temperature of 1050° C.

A method for producing dentures uses a green compact containing a mixture of ceramic powder and a binder system. A ceramic shell for dentures can be produced from the green compact and can be shaped and can be adapted to a carrier prior to a firing step below a temperature of 1050° C.

A composition comprises a zirconia powder, in which 55% or more thereof is monoclinic, and a stabilizer capable of suppressing phase transition of zirconia. An average particle diameter of zirconia particles and particles of the stabilizer is 0.06 μm to 0.17 μm. At least a portion of the stabilizer does not form a solid solution with zirconia.

A method of making a porous cordierite ceramic article using chlorite raw material is described herein. The method includes mixing materials to form a cordierite-forming mixture. The cordierite-forming mixture includes a chlorite raw material in an amount of about 5% to about 60% by weight and a platy aluminum silicate raw material in an amount of 0% to about 30% by weight of the total inorganic content of the cordierite-forming mixture. The cordierite-forming mixture is then formed into a green body and fired to form the porous cordierite ceramic article. In some cases, the porous cordierite ceramic article exhibits a low coefficient of thermal expansion (CTE), which provides the article with high thermal shock resistance.

A method of making a porous cordierite ceramic article using chlorite raw material is described herein. The method includes mixing materials to form a cordierite-forming mixture. The cordierite-forming mixture includes a chlorite raw material in an amount of about 5% to about 60% by weight and a platy aluminum silicate raw material in an amount of 0% to about 30% by weight of the total inorganic content of the cordierite-forming mixture. The cordierite-forming mixture is then formed into a green body and fired to form the porous cordierite ceramic article. In some cases, the porous cordierite ceramic article exhibits a low coefficient of thermal expansion (CTE), which provides the article with high thermal shock resistance.

A method for manufacturing a sensor element that includes: a pair of electrodes; a ceramic layer having a hollow space that is to be an air introduction hole; and a first layer and a second layer stacked at both surfaces of the ceramic layer, One of the electrodes is in communication with the hollow space, The method includes: preparing an unsintered ceramic sheet, and a burn-out material sheet having a thickness different from that of the unsintered ceramic sheet, the burn-out material sheet having, in a plane orthogonal to the direction of an axial line O, a cross-sectional area substantially identical to a cross-sectional area of the pre-sintering hollow space; placing the burn-out material sheet in the pre-sintering hollow space; pressing the sheets so as to have an identical thickness; and burning out the burn-out material sheet.

A method for manufacturing a sensor element that includes: a pair of electrodes; a ceramic layer having a hollow space that is to be an air introduction hole; and a first layer and a second layer stacked at both surfaces of the ceramic layer, One of the electrodes is in communication with the hollow space, The method includes: preparing an unsintered ceramic sheet, and a burn-out material sheet having a thickness different from that of the unsintered ceramic sheet, the burn-out material sheet having, in a plane orthogonal to the direction of an axial line O, a cross-sectional area substantially identical to a cross-sectional area of the pre-sintering hollow space; placing the burn-out material sheet in the pre-sintering hollow space; pressing the sheets so as to have an identical thickness; and burning out the burn-out material sheet.

A manufacturing method of a ring-shaped element for an etcher, comprises a granulation operation comprising i) a slurry manufacturing process of preparing a slurry by mixing a raw material including boron carbide, a sinterability enhancer with a solvent; and ii) a granulation process of drying the slurry to prepare granulated raw material; a molding operation of manufacturing a green body by molding the granulated raw material; a sintering operation of carbonizing and sintering the green body to manufacture a sintered body; a shape operation of shaping the sintered body to a ring-shaped element for an etcher. The sinterability enhancer comprises one selected from the group consisting of carbon, boron oxide and combinations thereof.

A grain-grade zirconia toughened alumina ceramic substrate and a method for preparing the same. The ceramic substrate is prepared from alumina power (main phase) and zirconia powder (secondary phase) in a binary azeotrope of anhydrous ethanol and butanone in the presence of magnesia-alumina spinel powder (as sintering aid), phosphate ester (as dispersant), polyvinyl butyral (as binder) and dibutyl phthalate (as plasticizer). In a mixture of the alumina power and the zirconia powder, a volume percentage of the alumina power is 82.44-96.7%, and a volume percentage of the zirconia powder is 3.30-17.56%. The magnesia-alumina spinel powder is 0.1-4.0% by weight of the mixture of the alumina power and the zirconia powder. A particle size ratio of the alumina powder to the zirconia powder is 2.415-4.444.