High strength porcelains for use in insulators and production th

Details High strength porcelains for use in insulators and production th High strength porcelains for use in insulators and production th

1988-02-24

1991-01-08

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Clay containing

501144, 501153, C04B 3324, C04B 3510

Patent

active

049835564

ABSTRACT:
High strength alumina porcelains for use in insulators are disclosed herein, in which the maximum particle diameter of quartz grians remaining in the porcelains is not more than 40 .mu.m. A process for producing such high strength alumina porcelains for use in insulators comprises the steps of mixing the alumina of a controlled grain size which is decomposed in a single crystalline state and in which the 50% average particle diameter is in a range from 4 to 14 .mu.m, raw materials ground finely which are selected from the group consisting essentially of feldspar, silica sand, and china stone, and clay together, forming the thus obtained mixture, and drying and firing the formed body.

REFERENCES:
patent: 3758318 (1973-09-01), Farris et al.
patent: 4183760 (1980-01-01), Funk et al.
patent: 4717695 (1988-01-01), Oda
Chemical Abstracts, vol. 104, No. 8, 1986, p. 277, Abstract No. 55127t, Columbus, OH, US; P. D. D. Rodrigo et al.: "High purity mullite ceramics by reaction sintering", & Int. J. High Technol. Ceram. 1985, 1(1), 3-30.

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