Preparation of hollow ceramic fibers

Details Preparation of hollow ceramic fibers Preparation of hollow ceramic fibers

1989-09-08

1990-08-14

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Refractory

501 92, 525475, 525477, 427 39, 427 38, 4273722, 264 82, 264173, C04B 3552, B05D 300

Patent

active

049487639

ABSTRACT:
Hollow ceramic fibers are prepared by melt spinning an organic silazane polymer, infusibilizing the fiber to form an infusible layer on the surface, and pyrolyzing the fiber to obtain a ceramic fiber having an empty interior. The infusibilizing step includes two steps of treating the fiber with a gas containing the vapor of an infusibilizing silicon, boron, phosphorus or metal compound and further treating with a water vapor-containing gas or ammonia-containing gas. The surface infusible fibers are efficiently sintered into hollow ceramic fibers without fusion bond.

REFERENCES:
patent: H721 (1990-01-01), McQuillan
patent: 4743662 (1988-05-01), Lipowitz
patent: 4870035 (1989-01-01), Takamizawa et al.
Card, "Preparation of Hollow Ceramic Fibers", Adv. Cer. Mat'l., vol. 3, #1, pp. 29-31 (1988).

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