矿物微粉制备的硅酸铝质高强陶瓷

介绍了一种以蓝晶石微粉和αAl2 O3 微粉为主要原料 ,一步煅烧法制备硅酸铝质高强陶瓷的工艺方法 ,并对制品的烧结性能、显微结构进行了分析。 (1)由该方法制得的硅酸铝质陶瓷 ,体积密度为 2 0 9～ 2 12 g/cm3 ,气孔率为 2 5 58%～ 2 8 54% ,常温耐压强度高达 180 87～ 315 30MPa ,在烧结过程中体积收缩率为 0 4 9%～ 2 73%。与传统烧结方法生产的同类产品相比 ,工艺流程简化 ,烧结温度降低 2 0 0～ 2 50℃以上 ,材料的耐压强度仍得到较大幅度的提高 ,是一种值得向生产领域推广应用的方法。 (2 )制品强度的提高 ,主要得益于纤维状莫来石的交错排列。 (3)陶瓷的烧结温度以 1350℃为宜。

ALUMINOSILICATE HIGH-PERFORMATION CERAMIC PREPARED FROM MINERAL MICROPOWDER

This paper presents a process to prepare aluminosilicate high\|performation ceramic by “one\|step sintering process” from the micropowder of kyanite and α Al 2O 3, and discusses sintering properties and microstructure of the ceramic. (1)The aluminosilicate ceramic, prepared by this process, has a bulk density of 2.09～2.12g/cm 3, porosity of 25 58%～28 54%, cool strength of 180 87～315 30MPa, firing shrinkage of 0 49%～2 73%. Compare with the traditional same kind of products and processes, this process is more simple, and the sintering temperature can be decreased 200～250℃, but the cool strength of the material was raised greatly. (2)Reinforce of ceramic mainly come the cross arrange of fibrous mullite. (3)The favorable sintering temperature of the ceramic is 1400℃.