富钛型钛酸锶钡基陶瓷的微观结构与介电性能
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江苏省高校自然科学基金资助项目(14KJB430011)

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Microstructures and Dielectric Properties of TiRich Barium Strontium Titanate Based Ceramics
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    摘要:

    采用传统固相法制备Nd2O3掺杂富钛型(Ba0.75Sr0.25) Ti1+xO3(x为摩尔比)陶瓷,通过扫描电镜及LCR测试系统,研究不同x值、Nd2O3掺杂量及烧结工艺对钛酸锶钡基陶瓷微观结构与介电性能的影响。结果表明,随着x值及Nd2O3掺杂量增大,陶瓷试样均出现柱状第二相。当x=0.01且w(Nd2O3)=0.4%时,陶瓷试样经1 250 ℃烧结2 h后,其室温相对介电常数(εr)高达8.67×103,介电损耗(tan δ)仅为7.87×10-3。随着x值及Nd2O3掺杂量增大,陶瓷的居里峰显著移动。

    Abstract:

    The Nd2O3 doped Tirich (Ba0.75Sr0.25)Ti1+xO3ceramics were prepared by the conventional solid statemethod. The effects of different x values, Nd2O3 doping content and sintering procession on the microstructures and dielectric properties of barium strontium titanate based ceramics were investigated by using SEM and LCR measure system.It is found that with the increase of x value and Nd2O3 doping content, the cylindrical grains namely the secondary phases exist in ceramic samples.When x=0.01 and w(Nd2O3)=0.4%, the sample sintered at 1 250 ℃ for 2 h exhibits high relative dielectric constant(εr)of up to 8.67×103 and low dielectric loss(tan δ) of merely 7.87×10-3.With the increase of x value and Nd2O3 doping content, the Curie peak of the ceramics system shifts obviously.

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经明月,凌志新,吴常青,陈瑜,李振宇,陈方旭,张晨.富钛型钛酸锶钡基陶瓷的微观结构与介电性能[J].压电与声光,2018,40(5):732-735. JING Mingyue, LING Zhixin, WU Changqing, CHEN Yu, LI Zhenyu, CHEN Fangxu, ZHANG Chen. Microstructures and Dielectric Properties of TiRich Barium Strontium Titanate Based Ceramics[J]. PIEZOELECTRICS AND ACOUSTOOPTICS

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  • 在线发布日期: 2018-10-16
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