Amorphous refractory castable were prepared by using different types of aluminate cement and fused mullite,and the changes in linear change rate,apparent porosity,bulk density,mechanical properties and load softening temperature after calci-nation at different temperatures were studied.The phase composition and microstructure were analyzed by XRD,SEM and EDS.The results show that the rate of linear change shows a trend of shrinkage after different calcination temperatures,apparent porosity increases with increasing temperature,and the bulk density increases first and then decreases with increasing temperature.After be-ing calcined at different high temperatures,the bending strength of mullite castable increases continuously with increasing tempera-ture,while the compressive strength decreases continuously with increasing temperature.The softening temperatures of CA80 and CA70 samples under load were the highest,which were 1462 ℃ and 1442 ℃ respectively.
关键词
铝酸盐水泥/莫来石/不定形浇注料/荷重软化温度
Key words
aluminate cement/mullite/amorphous castable/softening temperature under load
维普
万方数据