High-porosity silicon carbide ceramic material as well as preparation method and application thereof: Fid-Bau Portal

High-porosity silicon carbide ceramic material as well as preparation method and application thereof

CHENG SU / LU TONG / DENG YINGYING / LIU GUANGHAI

The invention discloses a high-porosity silicon carbide ceramic material as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing a solution 1 from tetraethoxysilane and absolute ethyl alcohol, preparing a solution 2 from m-cresol, a formaldehyde aqueous solution and anhydrous sodium carbonate, and preparing a solution 3 from deionized water, absolute ethyl alcohol and glacial acetic acid; and mixing the solution 1, the solution 2 and the solution 3, and performing water bath, heat treatment and sintering. The preparation process is simple, the porous structure of the high-porosity silicon carbide ceramic material can be effectively adjusted and controlled by adjusting the ratio of the raw materials and the viscosity of the solution, the cost of the raw materials is low, the requirement on processing conditions is low, the preparation period of the porous silicon carbide ceramic material can be shortened, and low-cost and large-scale production of the porous silicon carbide ceramic is realized; the prepared high-porosity silicon carbide ceramic material can be applied to preparation of a C/SiC composite material, rapid densification is achieved, the preparation period is shortened, and meanwhile the production cost is reduced.

本发明公开了一种高孔隙率碳化硅陶瓷材料及其制备方法与应用，其制备方法包括以下步骤：通过正硅酸乙酯和无水乙醇制备溶液1，间苯甲酚、甲醛水溶液和无水碳酸钠制备溶液2，去离子水、无水乙醇和冰乙酸制备溶液3；将溶液1、2和3混合后，经水浴、热处理和烧结，制得。本发明制备工艺简单，可通过调整原料的配比以及溶液的粘度有效调控制得高孔隙率碳化硅陶瓷材料的多孔结构，原料成本低，对加工条件的要求较低，可缩短多孔碳化硅陶瓷材料的制备周期，实现多孔碳化硅陶瓷的低成本、大规模生产；制得的高孔隙率碳化硅陶瓷材料可应用于C/SiC复合材料的制备中，实现快速增密，缩短制备周期的同时，降低生产成本。

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