PMN-PNN-PT陶瓷晶粒异常长大研究

1.清华大学,北京,100044

2.清华大学,北京,100044

3.清华大学,北京,100044

4.清华大学,北京,100044

基金项目: 中国博士后科学基金(2003034117) 国家重点基础研究发展计划(973计划)(TG2000067108) 中国科学院资助项目(50432030,50372032)

Abnormal Grain Growth of Pb(Mg1/3Nb2/3)O3-Pb(Ni1/3Nb2/3)O3-PbTiO3 Ceramics

采用两步法和等离子放电烧结技术制备出了致密的单一钙钛矿相的PMN-PNN-PT陶瓷,对其高温热处理后晶粒异常长大进行了研究.发现添加5%(质量分数)过量PbO有助于晶粒的异常长大,观察到了3种典型的异常长大晶粒,为下一步固态法制备该组成单晶打下了基础.

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