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首页> 外文期刊>Journal of Materials Science >Structure evolution and ferroelectric properties in stoichiometric Bi0.5+xNa0.5-xTi1-0.5xO3
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Structure evolution and ferroelectric properties in stoichiometric Bi0.5+xNa0.5-xTi1-0.5xO3

机译：化学计量BI0.5 + XNA0.5-XTI1-0.5xO3结构进化和铁电性能

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摘要

The influence of B-site deficiency on the stability of electrically induced long-range ferroelectric order of the stoichiometric Bi0.5+xNa0.5-xTi1-0.5x0.5xO3 (BNT-xV(Ti)) ( denotes vacancies) ceramics is studied. The depolarization and ferroelectric to relaxor transition are identified as separate and discrete processes in BNT-based materials. For BNT-0.02V(Ti), the resonance and anti-resonance peaks on dielectric permittivity-frequency curves indicate dominating ferroelectric phase at room temperature. The depolarization temperature, determined by thermally stimulated depolarization current, is 65 degrees C. However, the ferroelectric to relaxor transition temperature is absent, as no distinct frequency-independent anomalies for the dielectric permittivity exist. This depolarization process can be ascribed to nanoscale ferroelectric domain at room temperature for BNT-0.02V(Ti), which is induced by chemical disorder and strong random field as V-Ti generated. Hence, the results imply that the B-site deficiency in BNT is a very effective route to tailor the stability of electrically induced long-range ferroelectric order.
机译：B位缺乏对的电稳定性引起的影响远距离的化学计量Bi0.5 + xNa0.5-xTi1-0.5x0.5xO3（BNT-XV（Ti）的）（表示空缺）陶瓷的铁电顺序进行了研究。去极化和铁电到弛豫过渡识别为基于BNT-材料分开和离散的过程。对于BNT-0.02V（Ti）的，在介电常数 - 频率曲线的共振和反共振峰表明在室温下支配铁电相。去极化温度，由热刺激去极化电流来确定，为65℃。然而，在铁电到弛豫转变温度为不存在，作为介电常数不存在明显的频率无关的异常。这种去极化过程可以归因于纳米级在室温下BNT-0.02V（Ti）的，这是由化学障碍和强随机场产生的感应为V-Ti系铁电畴。因此，结果意味着，在BNT B位缺乏是裁缝的非常有效的途径电诱导长程秩序的铁电的稳定性。

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  • 来源
    《Journal of Materials Science》 |2019年第7期|共7页
  • 作者

    Shi Jing; Liu Xiao; Tian Wenchao;

  • 作者单位

    Xidian Univ Sch Mechanoelect Engn Key Lab Elect Equipment Struct Design Minist Educ Xian 710071 Shaanxi Peoples R China;

    Xian Univ Sci &

    Technol Coll Mat Sci &

    Engn Xian 710054 Shaanxi Peoples R China;

    Xidian Univ Sch Mechanoelect Engn Key Lab Elect Equipment Struct Design Minist Educ Xian 710071 Shaanxi Peoples R China;

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  • 正文语种 eng
  • 中图分类 工程材料学;
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