材料科学技术(英文版)2022，Vol.97Issue(2) ：182-189.

High-entropy(Ca0.2Sr0.2Ba0.2La0.2Pb0.2)TiO3 perovskite ceramics with A-site short-range disorder for thermoelectric applications

Ping Zhang Zhihao Lou Mengjie Qin Jie Xu Jiatong Zhu Zongmo Shi Qian Chen Michael J.Reece Haixue Yan Feng Gao
材料科学技术(英文版)2022，Vol.97Issue(2) ：182-189.
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High-entropy(Ca0.2Sr0.2Ba0.2La0.2Pb0.2)TiO3 perovskite ceramics with A-site short-range disorder for thermoelectric applications

Ping Zhang 1Zhihao Lou 1Mengjie Qin 1Jie Xu 2Jiatong Zhu 1Zongmo Shi 2Qian Chen 2Michael J.Reece 3Haixue Yan 3Feng Gao2
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作者信息

  • 1. State Key Laboratory of Solidification Processing,MIIT Key Laboratory of Radiation Detection Materials and Devices,School of Materials Science and Engineering,Northwestern Polytechnical University,Xi'an 710072,China
  • 2. State Key Laboratory of Solidification Processing,MIIT Key Laboratory of Radiation Detection Materials and Devices,School of Materials Science and Engineering,Northwestern Polytechnical University,Xi'an 710072,China;NPU-QMUL Joint Research Institute of Advanced Materials and Structure,Northwestern Polytechnical University,Xi'an 710072,China
  • 3. School of Engineering and Materials Science,Queen Mary University of London,London E1 4NS,United Kingdom;NPU-QMUL Joint Research Institute of Advanced Materials and Structure,Northwestern Polytechnical University,Xi'an 710072,China
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Abstract

Novel high-entropy perovskite-type(Ca0.2Sr0.2Ba0.2La0.2Pb0.2)TiO3(CSBLP)ceramics with cubic structure of Pm-3m space group were successful prepared by solid-state reaction method.Results of XRD,SEM-EDS,HRTEM confirmed a homogeneous distribution and equimolar arrangement of multicomponent cations on the A-site.The high-entropy CSBLP ceramics showed long-range structural order and short-range chemical disorder with widely dispersed nanoscale grains varying sizes of 4-6 nm in the microstructure.Because of increased configurational entropy,the CSBLP ceramic has an enhanced Seebeck coefficient(|S|=272 μV/K at 1073 K)and low thermal conductivity(κ=1.75 W/m·K at 1073 K)when annealed at 1300℃.This work demonstrates the possibility of effectively reducing thermal conductivity and improv-ing the performance of thermoelectric oxides through high-entropy composition design.

Key words

High-entropy ceramics/Thermoelectric materials/Thermal conductivity/Disorder

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基金项目

China-Poland International Collaboration Fund of National Natural Science Foundation of China(51961135301)

国家自然科学基金(52072301)

International Cooperation Foundation of Shaanxi Province(2020KW-032)

高等学校学科创新引智计划(111计划)(B20028)

出版年

2022
材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI
影响因子：0.657
ISSN：1005-0302
参考文献量43
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