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首页> 外文期刊>Journal of materials science >Effects of CaHfO_3 on the electrical properties of Bi_(0.49)Na_(0.49)Ca_(0.02)TiO_3 ferroelectric ceramics
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Effects of CaHfO_3 on the electrical properties of Bi_(0.49)Na_(0.49)Ca_(0.02)TiO_3 ferroelectric ceramics

机译：Cahfo_3对Bi_（0.49）Na_（0.49）CA_（0.02）TiO_3铁电陶瓷的电气性能的影响

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摘要

(1 - x)(Bi_(0.49)Na_(0.49)Ca_(0.02)TiO_3)-xCaHfO_3 (BCNTH-x, x = 0.01, 0.02, 0.03, 0.035, 0.04) systems were prepared by solid-state reaction method. Their microstruc-tures, dielectric/piezoelectric/ferroelectric properties and impedance spec-troscopy were investigated. All compositions demonstrated a single orthorhombic structure with Pbnm space group. Temperature-dependent permittivity curves displayed one anomaly, which shifts to low temperature from 278 to 208 °C with increased CaHfO_3 content, because of the replacement of Hf~(4+) for Ti~(4+) at the B-site that reduced B-site cation ordering. Analysis of dielectric and ferroelectric properties indicated that a crossover from typical ferroelectrics to relaxor ferroelectrics occurred in BCNTH-0.03 and BCNTH-0.035 ceramics. The largest electrostrictive strain of 0.22% and the lowest coercive field of 37.7 kV/cm were achieved in BCNTH-0.035 and BCNTH-0.03 ceramics under 100 kV/cm, respectively. Ferroelectric domain and domain wall were fitted by impedance complexes, and the corresponding activation energy was 0.46 and 1.18 eV, which may be correlated to the combination of motion of the first ionization of oxygen vacancies and doubly ionized oxygen vacancies, respectively.
机译：（1 - X）（Bi_（0.49）Na_（0.49）Ca_（0.02）TiO_3）通过固态反应方法制备-XCAHFO_3（BCNTH-X，X = 0.01,0.02,0.03,0.035,0.04）。研究了它们的微动力学，介质/压电/铁电性能和阻抗规范镜镜。所有组合物都表现出一种具有PBNM空间组的单晶状体结构。温度依赖性介电常数曲线显示出一个异常，随着CAHFO_3含量的增加，低温从278°C的低温转移，因为在减少的B - 位点的TI〜（4+）中替换HF〜（4+） B现场阳离子订购。电介质和铁电性能分析表明，来自BCNTH-0.03和BCNTH-0.035陶瓷中典型的铁电器到松弛铁电解的交叉。在100kV / cm的BCNTH-0.035和BCNTH-0.03陶瓷中，在100kV / cm下的最大电致伸缩菌株和37.7kV / cm的最低矫顽节。铁电域和畴壁被阻抗复合物装配，相应的活化能量为0.46和1.18eV，其可以分别与氧空位的第一电离和双电离氧空位的运动的组合相关。

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  • 来源
    《Journal of materials science》 |2020年第19期|16209-16219|共11页
  • 作者

    Yong Liu; Yujie Zhang; Liufang Meng; Xiao Liu; Changrong Zhou; Xinyu Liu; Changlai Yuan;

  • 作者单位

    College of Material Science and Engineering Guilin University of Electronic Technology Guilin 541004 People's Republic of China China Nonferrous Metals (Guilin) Geology and Mining Co .Ltd Guilin 541004 People's Republic of China;

    College of Material Science and Engineering Guilin University of Electronic Technology Guilin 541004 People's Republic of China;

    College of Material Science and Engineering Guilin University of Electronic Technology Guilin 541004 People's Republic of China Guangxi Key Laboratory of Information Materials Guilin University of Electronic Technology Guilin 541004 People's Republic of China;

    College of Material Science and Engineering Guilin University of Electronic Technology Guilin 541004 People's Republic of China;

    College of Material Science and Engineering Guilin University of Electronic Technology Guilin 541004 People's Republic of China Guangxi Key Laboratory of Information Materials Guilin University of Electronic Technology Guilin 541004 People's Republic of China;

    College of Material Science and Engineering Guilin University of Electronic Technology Guilin 541004 People's Republic of China Guangxi Key Laboratory of Information Materials Guilin University of Electronic Technology Guilin 541004 People's Republic of China;

    College of Material Science and Engineering Guilin University of Electronic Technology Guilin 541004 People's Republic of China Guangxi Key Laboratory of Information Materials Guilin University of Electronic Technology Guilin 541004 People's Republic of China;

  • 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);
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