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为减小样品的高温塑性形变量,在原有研究基础上,通过调整化学配比并引入方解石设计了新的配方。采用半干压成型工艺制备样品。烧成后对样品进行物理性能测试,并探讨最佳烧成温度和最佳配方。结果表明:综合性能最优的是经1280℃烧成的添加10%方解石的样品,其烧成收缩率是4.98%,吸水率为0.03%,气孔率为0.06%,体积密度为2.12 g/cm~3,高温塑性变形指数为3.98×10~(-6)/mm~(-1)。研究表明,高温塑性形变与样品的氧化物组成和烧成温度等因素有关,少量添加方解石的配方样品高温塑性形变量小,方解石的添加量应控制在一定范围内。
In order to reduce the high temperature plastic deformation of the sample, based on the original research, a new formula was designed by adjusting the chemical ratio and introducing calcite. Semi-dry pressure molding process to prepare samples. After firing, the physical properties of the samples were tested and the best firing temperature and the best recipe were discussed. The results show that the best overall performance is calcined at 1280 ℃ with 10% calcite added. The sintering shrinkage is 4.98%, the water absorption is 0.03%, the porosity is 0.06% and the bulk density is 2.12 g / cm ~ 3, the plastic deformation index of high temperature is 3.98 × 10 -6 / mm -1. The results show that the plastic deformation at high temperature is related to the oxide composition and firing temperature of the sample. The calcined samples with small amount of calcite are small in high temperature plastic deformation, and the addition of calcite should be controlled within a certain range.