Cordierite material useful in a heat source retainer and process

Details Cordierite material useful in a heat source retainer and process Cordierite material useful in a heat source retainer and process

1989-05-16

1990-11-27

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Refractory

501 9, 501 82, 501 84, 501144, 501119, C04B 3518, C04B 3806

Patent

active

049735667

ABSTRACT:
A porous cordierite ceramic and a process for making the same are provided by the present invention. Preferably, the ceramic material includes at least about 95 percent cordierite in the crystal phase, a porosity of at least about 30 volume percent, a crush load strength of at least about 6 pounds, and a thermal conductivity of less than about 5 watts/meter-.degree.K. The method of producing a porous cordierite ceramic includes (a) combining alumina, clay, talc, a pore-forming material and preferably free silica; (b) adding binder, water and other additives; and (c) shaping the mixture to form a green body. The green body is thereafter fired to form a sintered ceramic body. The porous cordierite is useful in a heat source retainer.

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Characteristics of Kyocera's Technical Ceramics, cited to show inherent properties of material.

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