Phase constitution, microstructures and microwave dielectric properties of CaxZn1−xZr0.8Sn0.2Nb2O

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• 作者：Lingxia Li ; Jing Ye ; Hao Sun ; Jingyang Yu…
• 刊名：Journal of Materials Science: Materials in Electronics
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：27
• 期：2
• 页码：1232-1238
• 全文大小：1,288 KB
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• 作者单位：Lingxia Li (1)
  Jing Ye (1)
  Hao Sun (1)
  Jingyang Yu (1)
  Shuai Zhang (1)
  
  1. Key Laboratory for Advanced Ceramics and Machining Technology, Ministry of Education, of Electronic and Information Engineering, Tianjin University, Tianjin, 300072, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Optical and Electronic Materials
  Characterization and Evaluation Materials
  
• 出版者：Springer New York
• ISSN：1573-482X

文摘

The phase constitution, microstructures and microwave dielectric properties of Ca_xZn_1−xZr_0.8Sn_0.2Nb₂O₈ (x = 0.00, 0.05, 0.10, 0.15) ceramics prepared via a solid-state reaction method were reported for the first time. The X-ray diffraction patterns of Ca_xZn_1−xZr_0.8Sn_0.2Nb₂O₈ ceramics showed the monoclinic structure of ZnZrNb₂O₈ and the second phase columbite CaNb₂O₆ were obtained. The microwave dielectric properties of the Ca_xZn_1−xZr_0.8Sn_0.2Nb₂O₈ ceramics were strongly affected by the change of crystal structure and the content of second phase. With the increasing Ca2+ content, the dielectric constant (ε _r ) and the Qf value decreased and the temperature coefficient of resonant frequency (τ _f ) moved to the positive direction. The typical values of ε _r  = 26.64, Qf = 61,350 GHz, τ _f  = −21.43 × 10−6/°C were obtained for Ca_xZn_1−xZr_0.8Sn_0.2Nb₂O₈ (x = 0.15) specimens sintered at 1275 °C for 6 h.