方解石对建筑卫生陶瓷高温塑性形变的影响

Effect of Calcite on Pyroplastic Deformation of Sanitary Ware

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。

The new series were designed based on the best formula obtained from previous studies. Samples were prepared using compression molding process. After the experiment, the physical properties were tested. The best firing temperature and the optimum formulation were selected. The formula with 10% calcite addition fired at 1280 °C was found to be the best. The sintering shrinkage is 4.98%, the water absorption is 0.03%, the porosity is 0.06%, the bulk density is 2.12 g/cm3 and the pyroplastic deformation index is 3.98×10-6/mm-1. The study showed that the pyroplastic deformation of the sample was related to the ratios of different oxidizes in the sample and the firing temperature.Besides, the pyroplastic deformation of the sample was decreased with the amount of calcite which was controlled within a certain range.