Microstructure and Dielectric Properties of Yttrium-Doped BaSn_0.05Ti_0.95O₃ Ceramics

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• 作者：Yuanliang Li ; Zhimin Cui ; Rongli Sang ; Zhongqiu Li…
• 关键词：Ceramics ; chemical synthesis ; x ; ray diffraction ; dielectric properties
• 刊名：Journal of Electronic Materials
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：45
• 期：10
• 页码：5206-5212
• 全文大小：822 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Optical and Electronic Materials
  Characterization and Evaluation Materials
  Electronics, Microelectronics and Instrumentation
  Solid State Physics and Spectroscopy
  
• 出版者：Springer Boston
• ISSN：1543-186X
• 卷排序：45

文摘

The microstructure and dielectric properties of Y3+-doped BaSn_0.05Ti_0.95O₃ (BTS5) ceramics were investigated. All BTS5 ceramics possess a single phase with a perovskite structure, and the Rietveld analysis further shows that the material exhibits tetragonal structure with space group P4mm. The amount of Y₂O₃ can greatly affect the dielectric properties of BTS5. The Curie peak of the blank sample is the highest, and the Curie peak of the samples is obviously suppressed after the doping of Y3+, and the dielectric maximum decreased up to 0.05 mol.% of Y3+ doping and then increased beyond 0.05 mol.% of Y₂O₃. Due to the amount of doping of Y3+ ions, the lattice distortion is decreased with the increase of Y3+ concentration, which decreases the short-range harmonic restoring force, so T_c shifts to a higher temperature in Y3+ doped BTS ceramics. In addition, the dielectric losses of 0.05–0.6 mol.% Y3+-doped BTS5 ceramics are very stable with the increasing environmental temperature, making them superior candidates for applications.