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首页> 外文期刊>Applied Physics Letters >Large electrocaloric efficiency over a broad temperature span in lead-free BaTiO_3-based ceramics near room temperature
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Large electrocaloric efficiency over a broad temperature span in lead-free BaTiO_3-based ceramics near room temperature

机译：室温下无​​铅BaTiO_3基陶瓷在宽温度范围内的大电热效率

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摘要

We report a large electrocaloric efficiency of 0.029 K cm kV~(-1) at 303 K and in a wide operating temperature range of 293 K to 313 K in a lead-free Ba_(0.9)Sr_(0.1)(Ti_(0.9)Zr_(0.1))_(0.95)Sn_(0.05)O_3 ceramic by using direct electrocaloric effect (ECE) measurements. Sn~(4+) doping in Ba_(0.9)Sr_(0.1)Ti_(0.9)Zr_(0.1)O_3 not only tunes the rhombohedral-to-paraelectric phase transition temperature to room temperature but also slightly widens the phase transition region, by slightly strengthening the diffuse character and maintaining its good ferroelectricity. Also, polar nanoregions embedded in the matrix facilitate polarization rotation because of a flat energy landscape associated with the relaxor-to-ferroelectric phase transition, inducing enhanced entropy changes and consequently excellent ECE performance.
机译：我们报告了在无铅Ba_（0.9）Sr_（0.1）（Ti_（0.9））下在303 K和293 K至313 K的宽工作温度范围内的0.029 K cm kV〜（-1）的大电热效率Zr_（0.1））_（0.95）Sn_（0.05）O_3陶瓷采用直接电热效应（ECE）测量。 Ba_（0.9）Sr_（0.1）Ti_（0.9）Zr_（0.1）O_3中的Sn〜（4+）掺杂不仅将菱形至顺电相转变温度调节至室温，而且还稍微扩大了相变区域稍微增强扩散特性并保持其良好的铁电性。同样，嵌入到基质中的极性纳米区域由于与弛豫器到铁电体相变相关的平坦能量格局而促进了极化旋转，从而导致熵变增强，因此具有出色的ECE性能。

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  • 来源
    《Applied Physics Letters》 |2017年第20期|202902.1-202902.5|共5页
  • 作者

    Tangyuan Li; Xinyu Liu; Sheng Shi; Yihao Yin; Hongfa Li; Qiongyan Wang; Yunlu Zhang; Jihong Bian; S. S. Rajput; Changbai Long; Biaolin Peng; Yang Bai; Yunzhi Wang; Xiaojie Lou;

  • 作者单位

    Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an 710049, China;

    Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an 710049, China;

    Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an 710049, China;

    Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an 710049, China;

    Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an 710049, China;

    Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an 710049, China;

    Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an 710049, China;

    Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an 710049, China;

    Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an 710049, China;

    Science and Technology on Plasma Dynamics Lab, Air Force Engineering University, Xi'an 710049, China;

    Guangxi Key Laboratory for Relativistic Astrophysics, Department of Physics, Guangxi University, Nanning 530004, China;

    Key Laboratory of Environmental Fracture (Ministry of Education), University of Science and Technology Beijing, Beijing 100083, China;

    Department of Materials Science and Engineering, The Ohio State University, Columbus, Ohio 43210, USA;

    Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an 710049, 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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  • 入库时间 2022-08-18 03:14:21

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