摘要
研究了碳化硅添加剂对含碳钙锆复合耐火材料抗氧化性能的影响·结果表明碳化硅添加剂通过如下两方面改善了耐火材料的抗氧化性:一方面碳化硅将气氛中的一氧化碳还原为碳,部分地补偿耐火材料中碳的氧化而提高了耐火材料的抗氧化性;另一方面,碳化硅添加剂通过改善耐火材料的显微结构而提高了耐火材料的抗氧化性·添加碳化硅能够明显地减少耐火材料中的大尺寸气孔,从而抑制环境中的氧气向耐火材料内部扩散·特别是在耐火材料表面形成致密的硅酸二钙(Ca2SiO4)保护层,能够显著地提高含碳钙锆复合耐火材料的抗氧化性·
SiC was added to carbon-containing CaO-ZrO_2 complex refractory to investigate its effect on the antioxidation of the refractory. The results showed that SiC can improve the antioxidation in two ways as follows: The added SiC deoxidizes CO to C so as to make up partially for the mass loss of carbon due to oxidation. Furthermore, it improves the antioxidation of the refractory by means of modifying its microstructure after heating at high temperature. The SiC additive obviously decreases the percentage of large size pores in the refractory to suppress the diffusion of ambient oxygen into the refractory. Especially the antioxidation of the refractory can be significantly improved because a dense belite(2CaO·SiO_2) layer forms near the surface of the refractory as a protective coating.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2005年第3期256-259,共4页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金和上海宝钢集团公司基金联合资助项目(20574021).
