为了探讨采用高温固相反应法合成CaZrO3粉体的适宜工艺条件,以CaO、Ca(OH)2和CaCO3粉为钙源原料,以纳米级ZrO2(简称nm-ZrO2)、微米级ZrO2(简称μm-ZrO2)和CaO部分稳定ZrO2(简称Ca-PSZ)粉为锆源原料,按照n(CaO)∶n(ZrO2)=1∶1分别组合配料,经混合、压制成型后,采用固相反应法分别在800、900、1 000、1 100和1 300℃保温3h煅烧合成CaZrO3粉体,探讨了原料种类及煅烧温度对CaZrO3合成率的影响.结果表明:有利于CaZrO3合成的钙源优势顺序(从优到劣)为CaO、Ca(OH)2、CaCO3,有利于CaZrO3合成的锆源优势顺序为nm-ZrO2、μm-ZrO2、Ca-PSZ;以nm-ZrO2、μm-ZrO2和Ca-PSZ为锆源的试样中,其CaZrO3含量迅速增加的温度区间分别主要发生在800~1 000℃、900 ~1 100℃和1 000~1 300℃;以CaO和纳米级ZrO2为原料,在1 000℃保温3h的条件下即可合成出纯度较高的CaZrO3粉体.
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