Production of ceramic materials

Details Production of ceramic materials Production of ceramic materials

1987-10-27

1990-08-21

Hearn, Brian E.

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

501 59, 501 96, 501102, 501128, 501153, 501154, 423397, 423276, 423324, 423132, 423111, 528 8, 528 29, 528 39, C04B 3500

Patent

active

049506269

ABSTRACT:
A process for the production of a refractory compound, e.g. a carbide or nitride, of a metallic or non-metallic element, by reacting a mixture of a compound of the metallic or non-metallic element having at least two groups reactive with hydroxyl groups and an organic compound having at least two hydroxyl groups to produce an oxygen-containing polymeric product, and pyrolysing the polymeric product, e.g. in an inert atmosphere to produce a carbide or in an atmosphere of reactive nitrogen compound to produce a nitride, in which the reaction mixture contains an aluminium compound containing at least one group reactive with hydroxyl groups.
The presence of the aluminium compound in the reaction mixture leads to an increase in the proportion of carbon in the product initially produced by pyrolysis, and to a higher purity in the refractory compound which is ultimately produced.

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Translation of Japanese Pat. No. 57-17412, published 1-29-82.
Chemical Abstract 96:201996k.
Chemical Abstraction 104(1986), Mar, No. 12, Columbia, Ohio.
"Preparation of Silicon Nitride from Silica", Shi-Chang Zhang and W. Roger Cannon, The American Societ, Cambridge, Mass., Sep. 15, 1982, Paper No. 132BE-82F) Revised 4-30-84.
Thermochemica Acta, 81 (1984), pp. 77-86.
Yajima et al., Chem. Lett., 1975, pp. 931-934.
Yajima, Nature, 1978, vol. 273, pp. 525-527.

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