改性钙钛酸铅陶瓷的电导性能研究
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Study on Conductivity of Modified Caadditive PbTiO3 Ceramics
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    摘要:

    当掺钙钛酸铅(PCT)用作为压电、热释电材料时,除介电性能外,电导性能也是重要的性能参数。采用传统固相法制备掺钙钛酸铅系陶瓷,研究了不同掺杂量的Sb2/3Mn1/3及烧结助剂NiO、Bi2O3对陶瓷相结构、介电损耗和电导性能的影响。结果表明,在1 180 ℃下烧结2 h,得到纯钙钛矿结构的改性陶瓷,陶瓷介电损耗降低;Sb2/3Mn1/3掺杂量对PCT系陶瓷在20~40 ℃的电阻温度稳定性有明显影响,随Sb2/3Mn1/3含量增加电阻温度系数(TCR)增大;在Pb0.80Ca0.20(Sb2/3Mn1/3)0.05Ti0.95O3中加入NiO、Bi2O3后有效降低了陶瓷在20~40 ℃的电阻温度系数;掺杂元素种类和掺杂量对陶瓷在20~80 ℃的TCR值基本没有影响,TCR值约为-0.15 μ℃-1。

    Abstract:

    In addition to dielectric property, conductivity of the Cadoped PbTiO3 ceramics (PCT) is a very important performance parameter when it is used as piezoelectric and pyroelectric materials. The Cadoped PbTiO3 ceramics were prepared by traditional solidstate process. The effects of Sb2/3Mn1/3 doping amount and sintering aids NiO, Bi2O3 on crystallographic phase, dielectric loss and conductivity of Cadoped PbTiO3 ceramics were investigated in this work. Results show that the modified ceramics with pure perovskite structure are obtained after sintered at 1 180 ℃ for 2 h, and the dielectric loss decreases significantly. Temperature stability of resistance of Cadoped PbTiO3 ceramics at 20~40 ℃ is influenced significantly by Sb2/3Mn1/3 doping amount. Resistivetemperature coefficient (TCR) of ceramic increases with the increase of Sb2/3Mn1/3 content. At 20~40 ℃ the resistivetemperature coefficient of Pb0.80Ca0.20(Sb2/3Mn1/3)0.05Ti0.95O3 ceramic is effectively decreased after NiO and Bi2O3 is added into the ceramic. Resistivetemperature coefficient of ceramics at 20~80 ℃ are hardly influenced by element types and doping amount, and the TCR value is about -0.15 μ℃-1.

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汤淑雯,朱丽慧,刘庆峰,黄清伟.改性钙钛酸铅陶瓷的电导性能研究[J].压电与声光,2015,37(3):446-449. TANG Shuwen, ZHU Lihui, LIU Qingfeng, HUANG Qingwei. Study on Conductivity of Modified Caadditive PbTiO3 Ceramics[J]. PIEZOELECTRICS AND ACOUSTOOPTICS

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  • 在线发布日期: 2015-06-10
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