稳定氧化锆陶瓷的热膨胀特性  

Thermal expansion behavior of Zirconia ceramic

作　　者：李晓红[1,2] 赵团[1,2] 赵文广 

机构地区：[1]包头钢铁设计研究院 [2]包头钢铁学院冶金与化学工程系

出　　处：《包头钢铁学院学报》1998年第2期91-93,共3页Journal of Baotou University of Iron and Steel Technology

摘　　要：应用热机械分析（ＴＭＡ）研究了ＭｇＯ部分稳定氧化锆（ＭｇＯ－ＰＳＺ）陶瓷的热膨胀特性．ＭｇＯ－ＰＳＺ陶瓷经一定条件热处理后，其单斜→四方相变可以在４６０～８３０℃和１１５０～１１８０℃两个温度范围发生．在４６０～８３０℃的单斜→四方相变降低了ＭｇＯ－ＰＳＺ的热膨胀系数和伴随相变产生的体积收缩，从而改善其抗热震性．The thermal expansion characteristics,which are affected by the sintering temperature and the heat treatment conditions,are studied by a dilatometric technique for MgO partially stabilized Zirconia ceramic specimens.It is found that the phase transformation from monoclinic to tetragonal takes place at two temperature ranges in 460-830℃ and 1150-1180℃.The decrease of volume changes associated with the phase transformation contributes to the improvement of thermal shock resistance of MgO partially stabilized Zirconia ceramic.

关 键 词：氧化锆 氧化镁 热膨胀 相变 抗热震性 陶瓷 

分 类 号：TQ174.758[化学工程—陶瓷工业]