Low temperature sintering of high permittivity BaTiO₃ based X8R ceramics doped with Li₂O-Bi₂O₃-B₂O₃ frit

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• 作者：Zhenyu Hu ; Bin Cui ; Shuai Jing ; Yaoyu Wang
• 关键词：Ceramics ; Low sintering temperature ; Microstructure ; High permittivity
• 刊名：Materials Letters
• 出版年：15 December, 2013
• 年：2013
• 卷：113
• 期：Complete
• 页码：167-169
• 全文大小：1254 K

文摘

BaTiO₃ ceramics doped with 3 wt% K_0.5Na_0.5NbO₃ content and different Li₂O-Bi₂O₃-B₂O₃ frit as the sintering aids were prepared by the conventional solid state ceramic route. The effects of the Li₂O-Bi₂O₃-B₂O₃ frit on the phase composition, microstructure and dielectric properties of BaTiO₃ ceramics were investigated. Results show that the BaTiO₃ pellet has pure tetragonal crystal structure. And the dielectric ceramic with high permittivity of 5585 and excellent densification were obtained at a sintering temperature of 980 掳C, meeting X8R specifications. The results also suggest that the developed BaTiO₃ based X8R ceramics may serve as a promising candidate for fabricating cheap multilayer capacitors with base metal as inner electrode.