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Effect of Ca substitution sites on dielectric properties and relaxor behavior of Ca doped barium strontium titanate ceramics

机译:Ca取代位点对Ca掺杂钛酸锶锶钡陶瓷介电性能和弛豫特性的影响

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摘要

Microstructure, dielectric properties, and ferroelectric relaxor behavior of Ca doped barium strontium titanate (BSCT) ceramics prepared by solid-state reaction were investigated. It was demonstrated that the unit cell volume of the BSCT ceramics firstly decreases with the increase of Ca contents up to x = 0.08, but increases with further addition of Ca (x ≥ 0.12). The shrinkage of the unit cell volume resulted from the substitution of Ba~(2+) by Ca~(2+) when x ≤ 0.08, which enhanced the relaxor behavior of the ferroelectrics. Conversely, a small amount of Ca~(2+) substituted for Ti~(4+) site when x ≥ 0.12, which weakens the relaxor behavior of the BSCT ceramics. The 8 mol % doped BSCT ceramic yielded the maximum index of relaxation (γ) of 1.90 and made it a promising candidate for future industrial application of efficient and eco-friendly relaxor ferroelectric materials.
机译:研究了固相反应制备的钙掺杂钛酸锶锶钡(BSCT)陶瓷的微观结构,介电性能和铁电弛豫特性。结果表明,BSCT陶瓷的晶胞体积首先随着Ca含量的增加而减小,直至x = 0.08,但随着Ca的进一步添加而增加(x≥0.12)。当x≤0.08时,Ba〜(2+)被Ca〜(2+)取代导致晶胞体积的收缩,从而增强了铁电体的弛豫特性。相反,当x≥0.12时,少量的Ca〜(2+)代替Ti〜(4+)位,从而削弱了BSCT陶瓷的弛豫性能。掺杂8摩尔%的BSCT陶瓷的最大弛豫指数(γ)为1.90,使其成为高效和环保的弛豫铁电材料未来工业应用的有希望的候选者。

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  • 来源
    《Journal of materials science》 |2015年第4期|2486-2492|共7页
  • 作者单位

    State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, Hunan, China;

    State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, Hunan, China;

    Laboratory of Dielectric Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China;

    State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, Hunan, China;

    State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, Hunan, China;

    School of Engineering and Materials Science. Queen Mary University of London, Mileend Road, London E1 4NS, UK;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
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  • 入库时间 2022-08-17 13:45:20

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