SiC/B复合超细粉末的溶胶-凝胶法合成

SOL-GEL SYNTHESIS OF SiC/B COMPOSITE ULTRAFINE POWDER

以硅溶胶、炭黑和硼酸或硼粉为原料,用溶胶-凝胶法合成了SiC/B复合超细粉末。粉末中硼的含量取决于硼源的种类和用量。硼的引入促进了粉末的昌粒长大并抑制了α-SiC相的生成。

Uitrafine SiC/B powder was synthesized from silica sol, carbon black and boric acid or boron powder by sol-gel processing. Boron content of SiC/B powder depends on the kind of boron sources and its quantity. It has been found that boron enhances the growth of particles and restricts the formation of α-SiC phase.