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首页> 外文期刊>Applied Physics Letters >Type-I pseudo-first-order phase transition induced electrocaloric effect in lead-free Bi_(0.5)Na_(0.5)TiO_3-0.06BaTiO_3 ceramics
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Type-I pseudo-first-order phase transition induced electrocaloric effect in lead-free Bi_(0.5)Na_(0.5)TiO_3-0.06BaTiO_3 ceramics

机译：无铅Bi_（0.5）Na_（0.5）TiO_3-0.06BaTiO_3陶瓷的I型拟一阶相变诱导电热效应

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摘要

In this study, the electrocaloric effect (ECE) of Bi_(0.5)Nao.5TiO_3-0.06BaTiO3 (BNT-0.06BT) ceramic has been directly measured using a home-made adiabatic calorimeter. The maximum adia-batic temperature change (AT) approaches 0.86 K under an electric field of 5kV/mm at 110°C, which provides experimental evidence for optimizing the ECE near the type-I pseudo-first-order phase transition (PFOPT). Most importantly, a considerable ΔT value can be maintained over a wide temperature range well above the temperature of the PFOPT under a high electric field. In addition, AT is closely related to the structural transition and electric field strength. This work provides a guideline to investigate the high ECE in BNT-based ferroelectric ceramics for applications in cooling technologies. I
机译：在这项研究中，Bi_（0.5）Nao.5TiO_3-0.06BaTiO3（BNT-0.06BT）陶瓷的电热效应（ECE）已使用自制的绝热量热仪直接测量。在110°C的5kV / mm电场下，最大绝热温度变化（AT）接近0.86 K，这为优化I型伪一阶相变（PFOPT）附近的ECE提供了实验证据。最重要的是，在高电场下，可以在远高于PFOPT温度的宽温度范围内保持相当大的ΔT值。另外，AT与结构转变和电场强度密切相关。这项工作为研究用于冷却技术的基于BNT的铁电陶瓷的高ECE提供了指导。一世

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  • 来源
    《Applied Physics Letters》 |2017年第18期|182904.1-182904.5|共5页
  • 作者

    Feng Li; Guorui Chen; Xing Liu; Jiwei Zhai; Bo Shen; Shandong Li; Peng Li; Ke Yang; Huarong Zeng; Haixue Yan;

  • 作者单位

    Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University, 4800 Caoan Road, Shanghai 201804, China , Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China , University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China;

    College of Physics, Qingdao University, 308 Ningxia Road, Qingdao 266071, China;

    Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University, 4800 Caoan Road, Shanghai 201804, China;

    Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University, 4800 Caoan Road, Shanghai 201804, China;

    Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University, 4800 Caoan Road, Shanghai 201804, China;

    College of Physics, Qingdao University, 308 Ningxia Road, Qingdao 266071, China;

    Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University, 4800 Caoan Road, Shanghai 201804, China;

    Functional Materials Research Laboratory, School of Materials Science and Engineering, Tongji University, 4800 Caoan Road, Shanghai 201804, China;

    Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;

    SchooI of Engineering and Materials Science, Queen Mary University of London, London E1 4NS, United Kingdom;

  • 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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