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Synthesis of antiferroelectric (Bi_(0.534)Na_(0.5))_(0.94)Ba_(0.06)TiO_3 ceramics with high phase transition temperature and broad temperature range by a solid-state reaction method

查看全文 作　　者：LI [1]XiaoJuan;XI [1]ZengZhe;LONG [1]Wei;FANG [1]PinYang 高影响力作者 机构地区：[1]School of Materials and Chemical Engineering, Xi'an Technological University高影响力机构 出　　处：《Chinese Science Bulletin》索引2013年第58卷第23期,共5页高影响力期刊 基　　金：supported by the National Basic Research Program of China(2013CB632904);the National Natural Science Foundation of China(51072155);Scientific Research Program Funded by Shaanxi Provincial Education Department(2010JK604);President Foundation of Xi'an Technological University,China(XAGDXJJ1010);Fostering Talents Foundation of Xi'an Technological University 摘　　要：Antiferroelectric 0.94(Bi 0.534 Na 0.5 )TiO 3 -0.06BaTiO 3 ceramics were prepared using a solid-state reaction method, involving the addition of excessive amounts of Bi2O3 . The resulting ceramics featured a very high phase transition temperature (Tm~330°C), from the antiferroelectric to the paraelectric phase, and a low depolarization temperature (Td<25°C). The broad temperature range, within which antiferroelectric properties are retained, of the prepared materials indicates their higher potential over lead-based antiferroelectric ceramics such as PZT-based materials that exhibit a lower T m ≤170°C. The lower Td and higher T m obtained val- ues, relative to those reported in the literature, are believed to be due to the formation of A-site vacancies originating from the incorporation of excess Bi into the perovskite structure of the studied sample. In addition, the synthesized sample shows a high dielectric constant of ~1460, in a temperature range of 50-150°C at 1 kHz, and a high energy storage density of 0.71 J/cm 3 , which is an asset in energy storage capacitor applications. 关 键 词：陶瓷制备 温度范围 相变温度 固态反应 反铁电 合成 PZT材料 钙钛矿结构
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