Method for preparing silicon carbide ceramic

Abstract

The invention discloses a method for preparing carborundum ceramic, which comprises the following steps: mixing bamboo charcoal with silicon powder after crushing and grinding bamboo charcoal by solid phase sintering, according to the mass ratio of 1 to 3, and evenly mixing the mixture of silicon and charcoal with phenolic resin according to the weight volume ratio of 1 to 1; preheating the mixture at the temperature of 140 DEG C for molding; under the state of vacuum or Ar gas atmosphere, increasing the temperature to the set final sintering temperature for high-temperature sintering; maintaining the temperature for 30 minutes, and cooling the mixture to produce the SiC ceramic material. In the method, carbide materials can be produced by an organic texture of bamboo materials through high-temperature sintering, the bamboo materials are charred under anaerobic condition to produce a charcoal frame with a bamboo pore structure, and the charcoal frame can be used as a biological template for ceramic phase filtering and reacting. The ceramic obtained through filtering and sintering reactions of metal or inorganic non-metal substances not only has a fine structure of bamboo, but also increases the reacting area, improves the resultant velocity, and has advantages superior to the prior ceramic preparation method.

Description

technical field [0001] The invention relates to a method for preparing silicon carbide ceramics. Background technique [0002] At present, the research on the preparation of SiC ceramics by biological materials is mostly concentrated on wood, and there is almost no research on the preparation of this high-performance ceramic material by using bamboo charcoal. Utilization methods and the development of new products using bamboo charcoal as raw materials have important theoretical and practical significance. Contents of the invention [0003] Aiming at the problems existing in the prior art, the object of the present invention is to provide a method for preparing silicon carbide ceramics, which utilizes the carbide ceramic material obtained through high-temperature sintering of bamboo biological structures. [0004] In order to achieve the above object, a kind of preparation method of silicon carbide ceramics of the present invention is specifically: [0005] 1) Using soli...

AI Technical Summary

Problems solved by technology

[0002] At present, the research on the preparation of SiC ceramics by biological materials is mostly concentrated on wood, and there is almost no research on the preparation of this high-performance ceramic material by using bamboo charcoal. Utilization methods and the development of new products using bamboo charcoal as raw materials have important theoretical and practical significance

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