A bonding agent for a ceramic decalcomania comprises a balanced combination of a fast acting solvent and a moderating agent. A thickening agent may also be present. The decalcomania may be applied to the article either before or after a glaze is applied. The use of such a bonding agent for adhering a decalcomania to ceramic ware permits glaze firing without the necessity of first removing the organic material in the decalcomania and fusing the pigment to the ceramic article by prior heat treatme...

When from 0.1 to 6 percent by weight of crystallite growth promoter is intimately combined with agglomerated less than 0.1 micron grains of ferric oxide and strontium oxide, barium oxide and/or lead oxide the resulting admixture may be formed into strontium, barium, and/or lead ferrite bodies having a surprisingly high degree of crystallite orientation by maintaining the admixture at a temperature of from 500.degree.C to 900.degree.C for a period of not more than 24 hours to cause the oxides to ...

An object of the present invention is to provide a heater having a ceramic substrate with a through hole formed therein so that the uniformity of temperature on the heating face of the substrate can be improved and the use life of the ceramic substrate can be improved upon thermal cycles. A ceramic heater comprises a substrate made of a ceramic material and having a heating face where three or more zones 3C, 3F are allocated, heating resistances corresponding to the zones, respectively, and term...

A high-strength machinable ceramic capable of high-precision fine machining has a coefficient of thermal expansion close to that of silicon and preferably a uniform blackish color which facilitates image processing of machined parts. The ceramic comprises a main constituent and a sintering aid. The main constituent comprises 30 59.95 mass % of boron nitride, 40 69.95 mass % of zirconia, optionally up to 20 mass % of silicon nitride and 0.05 2.5 mass % (calculated as an element) of at least one c...

A dielectric ceramic composition includes sintered ceramic grains having a core-shell structure, wherein smaller than or equal to 50% of the grains have a domain width of twin less than 20 nm; 30% to 70% of the grains have a domain width of twin in the range from 20 nm to 50 nm; less than or equal to 50% of the grains have a domain width of twin greater than 50 nm or have no twin. A ceramic capacitor includes more than one internal electrode and one or more dielectric layers composed of a dielec...

A ceramic green sheet of the invention contains an inorganic powder and an organic resin and is characterized in that the inorganic powder contains 72 to 98% by weight of aluminum oxide, 1 to 12% by weight of copper oxide, 0.1 to 3% by weight of titanium oxide, and 0.25 to 10% by weight of silicon oxide based on 100% by weight of the total weight of the inorganic powder.

A ceramic powder including silicon dioxide, iron oxide, iron, magnesium oxide, aluminum oxide, and a trace element group. The silicon dioxide occupies the powder of total weight from 81% to 86%; the iron oxide occupies the powder of total weight from 12% to 16%; the iron occupies the powder of total weight from 0.5% to 2%; the magnesium oxide occupies the powder of total weight from 0.2% to 0.5%; the aluminum oxide occupies the powder of total weight from 0.05% to 0.3%; and the trace element gro...

This invention is directed to providing a high-performance ceramic support being capable of realizing early activation of a catalyst due to direct loading while maintaining the excellent properties of the substrate ceramic, and being less susceptible to heat deterioration, by specifying the kind and combination of optimal replacing elements and the replacing amount and the like. A ceramic support comprising a substrate ceramic containing Mg, Al, Si and O as constituent elements are solid-dissolv...

A ceramic composition including a first ceramic material and a second ceramic material that is in the form of nano-, submicron-, or micron-sized particles, in which the first ceramic material has a lower melting point than the second ceramic material, and, when the first ceramic material melts into a liquid and the second ceramic material remains particulate, the second ceramic material floats at the top of the liquid. Also disclosed is a variant of this composition including a first ceramic mat...

A ceramic filter is provided, including a base body having partition walls made of a ceramic porous body and defining cells, filter membranes provided on the partition walls which are made of a ceramic porous body having an average pore diameter smaller than that of the surface of each partition wall, and a glass seal provided to cover at least the end face of the base body. The glass seal includes an alkali-free glass containing silica (SiO2) in an amount of 55 to 65 mol %, zirconia (ZrO2) in a...