采用微波烧结制备了0.6Ca0.61La0.26TiO3-0.4La(Mg0.5Ti0.5)O3［0.6CLT-0.4LMT］陶瓷,研究烧结工艺对其显微结构和晶粒生长行为的影响,并采用线性回归方法建立了Hillert模型和Sellars简化模型,采用非线性回归方法建立了具有时间指数的Sellars-Anelli模型。结果表明,随着烧结温度的升高、保温时间越长,晶粒尺寸越大,且烧结温度对晶粒生长的影响更为明显。对三种模型预测的晶粒尺寸与实验结果的平均晶粒尺寸进行了误差分析,发现Hillert模型对该陶瓷的预测精度最低,Sellars-Anelli模型对该陶瓷的预测精度最高。由Sellars-Anelli模型得到的0.6CLT-0.4LMT陶瓷的晶粒生长动力学方程为d4.718=d4.7180+4.516×1033×t0.888×exp,能够有效预测0.6CLT-0.4LMT陶瓷微波烧结的晶粒生长过程。

0.6Ca0.61La0.26TiO3-0.4La(Mg0.5Ti0.5)O3［0.6CLT-0.4LMT］ ceramics were prepared by microwave sintering. The effect of sintering process on its microstructure and grain growth behavior was studied. A Hillert model and Sellars simplified model was established by linear regression, and a nonlinear regression method was used to establish the Sellars-Anelli model with time index. The results show that with the increase of sintering temperature and the increase of holding time, the grain size is larger, and the effect of the sintering temperature on the grain growth is more obvious. The grain sizes predicted by the three models and the experimental results were analyzed. It is found that the Hillert model has the lowest prediction accuracy for the ceramic, and the Sellars-Anelli model has the highest prediction accuracy for this ceramic. The Sellars-Anelli model is d4.718=d4.7180+4.516×1033×t0.888×exp, which can effectively predict the grain growth process of 0.6CLT-0.4LMT ceramic by microwave sintering.