氧化物陶瓷的微波烧结机理

MICROWAVE SINTERING MECHANISM OF CERAMICS

本文是综述文章，介绍了近十几年来发展较快的微波烧结技术，及微波烧结时 Ａｌ２ Ｏ３ 、 Ｚｒ Ｏ２ 等材料的微波烧结机理。研究发现， Ａｌ２ Ｏ３ 、 Ｚｒ Ｏ２ 陶瓷的微波烧结机理与常规烧结基本相同，微波烧结条件下的烧结及晶粒长大的活化能比常规烧结条件下低、速度较常规烧结条件下快，说明微波烧结条件下起决定作用的传质过程不同，微波烧结中体积扩散占主要地位，但产生这一现象的原因尚待研究。

This is a summarize article to introduce the rapid developing technology-microwave sintering,it mainly introduced the mechanism of microwave sintering of Al 2O 3 and ZrO 2.It is discovered that there is no essential different between microwave sintering and conventional sintering of Al 2O 3 and ZrO 2 ceramic.The active energy of sintering and grain grows in microwave sintering are lower than that of in conventional,and the sintering rate is usually more rapidly.It is said the decided mass transfer process is different.Bulk diffusion is main diffusion in microwave sintering.It is still unknown why this phenomenon occurred.