Microstructure and Electrical Properties of BaTiO3-Based PTC Ceramics Prepared from Nanopowders

摘要：

　　Dense PTC ceramics were prepared with BaTiO3 nanopowders synthesized by hydrothermal method.BaCO3 and Ti(OC4H9)4 were used as barium and titanium sources,and Y(NO)3·6H2O as the donor dopant respectively.The average grain size of the powders obtained after hydrothermal treatment at 160℃ for 9h was about 30nm with cubic structure.Mn(NO3)2 was introduced to the as-prepared nanopowders in order to improve the PTC effect.After sintered at 1280℃,the PTC ceramic samples exhibited sufficient resistance jump ratio(1.086× 103) around Curie temperature,the density of which was 5.81g/cm3(96.5% of the theoretical density).

关键词： Barium titanate PTC Nanopowders Hydrothermal method

作者: Liu Huan Gong Shuping Zhou Dongxiang Chen Chunfang Zheng Zhiping Hu Yunxiang

作者单位: Engineering Research Center for Functional Ceramics of the Ministry of Education,Department of Electronic Science & Technology,Huazhong University of Science & Technology,Wuhan 430074,P.R.China

会议类型: 国际会议

会议名称: The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))

会议地点: 长沙

会议语种:英文

页码: 456-458

在线出版日期: 2007-05-10（万方平台首次上网日期，不代表论文的发表时间）