CaO引入量对ZrO_2制品相组成和性能的影响  

Effect of CaO addition on phase composition and properties of ZrO_2 products

作　　者：李学伟[1] 段桂芳[2] 刘春红[1] 闫磊鑫[1] 郑书航[1] 张立明[1] 

机构地区：[1]中钢集团洛阳耐火材料研究院有限公司先进耐火材料国家重点实验室,河南洛阳471039 [2]中钢集团耐火材料有限公司,河南洛阳471039

出　　处：《耐火材料》2013年第6期443-446,共4页Refractories

摘　　要：以Ca-PSZ和工业ZrO2为原料,以未引入CaO的ZrO2制品作对比,研究了CaO引入量(其质量分数分别为0.5%、1.0%、1.5%、2.0%、3.5%、5.0%和7.0%)对ZrO2制品相组成及性能的影响。结果表明:CaO的引入对ZrO2制品相组成的影响显著;随着CaO引入量的提高,ZrO2的稳定度增加,试样的致密度有所下降,抗热震性也逐步降低;CaO引入量为1.5%(w)时,试样强度最高,分析认为试样中单斜相与稳定相热膨胀系数的不同导致在两相界面产生应力,而这种应力是稳定相较低时抗热震性异常的主要原因。Effects of CaO additions （0,0.5%,1.0%, ]. 5% ,2.0% ,3.5% ,5.0% and 7.0%,in mass） on phase composition and properties of zirconia products were studied using CaO partially stabilized ZrO2 and commercial ZrO2 as starting materials. The results show that adding CaO has obvious effects on phase composition ;as CaO addition increases,ZrO2 stability degree increases, density and thermal ,shock resist- ance decline;when CaO addition is ]. 5% ,the specimen has the highest strength. The stress forms on the interfaces between monoclinic phase and stabilized ZrO2 because of their different thermal expansion coef- ficients,and results in the abnormal thermal shock resistance of specimens with less stabilized ZrO2. Key words： calcia; zirconia product; phase composition; property

关 键 词：氧化钙 氧化锆制品 相组成 

分 类 号：TQ175[化学工程—硅酸盐工业]