Dielectric and energy storage properties of BaTiO₃-Bi(Mg_1/2Ti_1/2)O₃ ceramic: Influence of glass addition and biasing electric field

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• 作者：Qingyuan Hu ; Tong Wang ; Luyang Zhao ; Li Jin ; Zhuo Xu ; Xiaoyong Wei ; ^{wdy@mail.xjtu.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Biasing field ; Glass addition ; Energy storage
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：43
• 期：1
• 页码：35-39
• 全文大小：872 K

文摘

B₂O₃-SiO₂ glass added 0.88BaTiO₃–0.12Bi(Mg_1/2Ti_1/2)O₃ relaxor-ferroelectric ceramics were successfully prepared and characterized by means of X-ray diffraction, dielectric and ferroelectric measurements. Effects of glass contents on the properties of the ceramics are discussed. The pure 0.88BaTiO₃–0.12Bi(Mg_1/2Ti_1/2)O₃ ceramic displays a good temperature stability of the dielectric constant from −75 °C to 100 °C. And this temperature stable dielectric behavior gradually disappears with increasing glass content. The energy storage density increases from 1.641 J/cm³ to 1.971 J/cm³ by glass additives. Influences of biasing electric fields on dielectric properties are also discussed. The long range ordered phase can be extended to higher temperatures by biasing electric fields. A slight increase of the permittivity under the biasing field is obtained. These results indicate that a weak polar phase existed in the 0.88BaTiO₃–0.12Bi(Mg_1/2Ti_1/2)O₃ ceramic and the B₂O₃–SiO₂ glass addition is an effective method to improve energy storage properties.