Method for preparing molded articles of high-purity alumina fibe

Details Method for preparing molded articles of high-purity alumina fibe Method for preparing molded articles of high-purity alumina fibe

1992-04-28

1994-06-14

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 66, 264 86, 264 87, 26417711, 264DIG19, C04B 3510

Patent

active

053207912

ABSTRACT:
Molded articles of high-purity alumina fibers, which are porous materials in which heat resistance is high, and in particular, deformation and linear shrinkage in heat cycles at a temperature more than 1700.degree. C. are small. The production method comprising spinning a spinning solution containing an alumina fiber precursor as the main component to obtain precursor fibers, prefiring these precursor fibers at 400.degree. to 1000.degree. C. to form prefired fibers, and then molding and calcining these prefired fibers. Sintering between the fibers can be achieved at a relatively low temperature. In particular, even when no inorganic binder component is added, the molded articles of high-purity alumina fibers can be obtained by a simple process.

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Patent Abstracts of Japan, vol. 143, (C-521), first abstract (Aug. 16, 1988).
Patent Abstracts of Japan, vol. 14, No. 548 (C-785), (Dec. 5, 1990).

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