高温烧结炉用堇青石一莫来石耐火砖结合剂研究

采用反应烧结法制备了高温烧结炉用堇青石一莫来石耐火砖,研究了不同结合剂对耐火砖组织结构和性能的影响.结果发现,与黏土结合剂在烧结过程巾有大量莫来石相生成相比,堇青石质结合剂在烧结过程中有大量新生相堇青石生成,热膨胀系数和抗折强度普遍较低,气孔率和热震稳定性较高,随着堇青石质结合剂含量的增加,热膨胀系数逐渐减小,气孔率和...

Study on Binders of Cordierite-mullite Refractory Bricks for High Temperature Sintering Furnace

The effects of different high temperature binders on properties and microstructures of the cordierite-mullite refractory bricks by direct sintering method were studied. The results show that cordierite and mullite are produced when using cordierite additives and clay as main materials respectively. The thermal expansions and flexural strengths of cordierite-mullite refractory bricks using clay as high temperature bind ers, is higher than that, which uses the mixture of oxide as the additive, but porosities show opposite tendency. The flexural strength after 1 100 ℃-water cooled （3 times） ofcordierite-mullite refractory bricks using the mixture of oxide as the additive, is higher than that, which uses clay as the additive. The conservation rate of the flexural strength after 1 100℃-water （3 times） ofcordierite-mullite refractory bricks varies as increasing-decreasing with the content of the mixture of oxide increasing, when the content ofthe mixture of oxide is as high as 22.5%, the highest conservation rate of the flexural strength after 1 100℃-water （3 times） is at 65.89%, and the thermal shock resistance of cordierite-mullite refractory bricks is superior.