摘   要：以d50=1.03μm的偏高岭土依次取代0、20%、40%、60%、80%和100%的二氧化硅微粉，研究了偏高岭土对耐火材料基质常温强度、泛霜性能、热处理后线收缩率、不同温度（600℃、800℃和1000℃）的热处理以及800℃重烧10次后的力学性能。结果表明，偏高岭土不利于在800℃重烧时基质强度的提高，但偏高岭土能够较好地改善基质的泛霜性能，减小基质热处理后的线收缩率，且在偏高岭土替代二氧化硅微粉量为40%时，基质具有良好的常温和热处理后的力学性能。

Abstract: Aiming at the concrete matrix applied to the heat-resistant craft product, metakaolin（d50=1.03μm）was used to replace silica fume by 0、20%、40%、60%、80% and 100%. These samples were investigated in terms of the strength at room temperature，the efflorescence performance，the shrinkage ratio and the strength after the refractory matrices exposed to different high temperatures(600℃、800℃ and 1000℃), besides, the residual strength was carried out on them at 800℃ by 10 times thermal cycle. Although test results showed that metakaolin did not benefit the improvement of strength of matrix after thermal cycle，it was good for the prevention of efflorescence performance and the decrease of the shrinkage ratio. In addition, when silica fume was replaced by metakaolin at 40% in the matrix, better strength was achieved at room temperature and thermal treatment.