SiO.sub.2 - and ZrO.sub.2 -based ceramic fibers and process for

Details SiO.sub.2 - and ZrO.sub.2 -based ceramic fibers and process for SiO.sub.2 - and ZrO.sub.2 -based ceramic fibers and process for

1990-01-25

1992-12-08

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Refractory

501103, 501106, 501133, 423326, 423336, 423338, 423608, C04B 3548, C04B 3312

Patent

active

051698099

ABSTRACT:
The present invention relates to ZrO.sub.2 - and SiO.sub.2 -based ceramic fibers in which the weight ratio between SiO.sub.2 and ZrO.sub.2 is comprised between 99 and 0.7. The tetragonal ZrO.sub.2 phase is stable at temperatures comprised between 0.degree. and 1500.degree. C. The process comprises the preparation of: a solution of Zr(OR.sup.1).sub.4, where R.sup.1 is an alkyl or aryl, Si(OR.sup.2).sub.4, where R.sup.2 is alkyl or aryl, an organic solvent and an acid. Vapor-phase water is bubbled in said solution, then the obtained solution is drawn and the fibers thus obtained are heated to obtain the crystallization of ZrO.sub.2 and SiO.sub.2.

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patent: 4810441 (1989-03-01), Emblem et al.
patent: 4927622 (1990-05-01), Jade
Kamiya et al., Journal of Materials Science, 15:1765-1771 (1980).
Sakka and Kuzuka, Journal of Non-Crystalline Solids, 100:142-153 (1988).

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