Effect of Mg on the dielectric and electrical properties of BaTiO3-based ceramics

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• 作者：Huiling Gong ; Xiaohui Wang ; Qiancheng Zhao ; Longtu Li
• 刊名：Journal of Materials Science
• 出版年：2015
• 出版时间：November 2015
• 年：2015
• 卷：50
• 期：21
• 页码：6898-6906
• 全文大小：1,474 KB
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• 作者单位：Huiling Gong (1)
  Xiaohui Wang (1)
  Qiancheng Zhao (1)
  Longtu Li (1)
  
  1. State Key Lab of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Materials Science
  Characterization and Evaluation Materials
  Polymer Sciences
  Continuum Mechanics and Mechanics of Materials
  Crystallography
  Mechanics
  
• 出版者：Springer Netherlands
• ISSN：1573-4803

文摘

BaTiO3-based dielectric ceramics with grain sizes of 100-20?nm were prepared by the chemical coating approach and are promising for the application of ultrathin multilayer ceramic capacitors. The doping effects of Mg on the microstructures and dielectric properties of the BaTiO3-based ceramics were investigated. The addition of Mg was beneficial for inhibiting the grain growth and improving sintering characteristics and improving the dielectric properties and reliability of the nano-BaTiO3-based ceramics. The highly accelerated lifetime test and thermally stimulated depolarization current were employed to study the resistance degradation and conduction mechanism of the Mg-doped BaTiO3 ceramics. It was determined that the reliability characteristics greatly depended on the Mg content. The addition of 2?mol% Mg was suitable for improving the reliability of the nano-BaTiO3-based ceramics, which is an important parameter for the application of multilayer ceramic capacitors. However, further increasing the addition amount of Mg decreased the performance of the BaTiO3-based ceramics.