Low temperature sintering and microwave dielectric properties of Zr0.3(Zn1/3Nb2/3)0.7TiO4 ceramics doped with CuO-B2O3

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• 作者：Pengyuan Fan ; Zhiping Zheng ; Gang Dou ; Bing Xie ; Xiangdong Li…
• 刊名：Journal of Electroceramics
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：36
• 期：1-4
• 页码：40-45
• 全文大小：1,130 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Optical and Electronic Materials
  Ceramics,Glass,Composites,Natural Materials
  Characterization and Evaluation Materials
  Electrochemistry
  Crystallography
  
• 出版者：Springer Netherlands
• ISSN：1573-8663
• 卷排序：36

文摘

The effects of CuO-B₂O₃ additive on sintering temperature and microwave dielectric properties of Zr_0.3(Zn_1/3Nb_2/3)_0.7TiO₄ ceramics prepared by solid-state reaction method have been investigated. The phases and microstructure have also been evaluated using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The pure Zr_0.3(Zn_1/3Nb_2/3)_0.7TiO₄ ceramics show a high sintering temperature of about 1170 °C. However, the addition of CuO-B₂O₃ lowered the sintering temperature of Zr_0.3(Zn_1/3Nb_2/3)_0.7TiO₄ ceramics from 1170 to 920 °C due to the CuO-B₂O₃ liquid-phase.The results showed that the microwave dielectric properties were strongly dependent on densification, crystalline phases and grain size. The Zr_0.3(Zn_1/3Nb_2/3)_0.7TiO₄ ceramics with the addition of 4.0 wt.% CuO + 4.0 wt.% H₃BO₃ sintered at 920 °C afforded excellent dielectric properties of ε_r = 45.8, Q×f =10918 GHz (at 4.5 GHz) and τ_f = 45.6 ppm/°C, which represent very promising candidates for LTCC dielectric materials.KeywordsCeramicsPhasesZr_0.3(Zn_1/3Nb_2/3)_0.7TiO₄Dielectric properties