中国物理B ›› 2017, Vol. 26 ›› Issue (1): 16602-016602.doi: 10.1088/1674-1056/26/1/016602

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Tuning the thermal conductivity of strontium titanate through annealing treatments

Liang Zhang(张喨), Ning Li(李宁), Hui-Qiong Wang(王惠琼), Yufeng Zhang(张宇锋), Fei Ren(任飞), Xia-Xia Liao(廖霞霞), Ya-Ping Li(李亚平), Xiao-Dan Wang(王小丹), Zheng Huang(黄政), Yang Dai(戴扬), Hao Yan(鄢浩), Jin-Cheng Zheng(郑金成)   

  1. 1. Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen 361005, China;
    2. Fujian Provincial Key Laboratory of Mathematical Modeling and High-Performance Scientific Computation, Xiamen 361005, China;
    3. Xiamen University Malaysia, Sepang, Selangor 439000, Malaysia;
    4. Department of Chemical Engineering,~School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
  • 收稿日期:2016-05-05 修回日期:2016-09-02 出版日期:2017-01-05 发布日期:2017-01-05
  • 通讯作者: Hui-Qiong Wang, Jin-Cheng Zheng E-mail:hqwang@xmu.edu.cn;jczheng@xmu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. U1332105, 51475396, 11335006, 21103109, 21176152, and 21373137), the Natural Science Foundation of Fujian Province of China (Grant No. 2013J01026), and the Fundamental Research Funds for Central Universities of China (Grant Nos. 2013121012, 20720140517, 20720160013, and 20720160020).

Tuning the thermal conductivity of strontium titanate through annealing treatments

Liang Zhang(张喨)1, Ning Li(李宁)1, Hui-Qiong Wang(王惠琼)1,3, Yufeng Zhang(张宇锋)1, Fei Ren(任飞)1, Xia-Xia Liao(廖霞霞)1, Ya-Ping Li(李亚平)1, Xiao-Dan Wang(王小丹)1, Zheng Huang(黄政)1, Yang Dai(戴扬)4, Hao Yan(鄢浩)4, Jin-Cheng Zheng(郑金成)1,2,3   

  1. 1. Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University, Xiamen 361005, China;
    2. Fujian Provincial Key Laboratory of Mathematical Modeling and High-Performance Scientific Computation, Xiamen 361005, China;
    3. Xiamen University Malaysia, Sepang, Selangor 439000, Malaysia;
    4. Department of Chemical Engineering,~School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
  • Received:2016-05-05 Revised:2016-09-02 Online:2017-01-05 Published:2017-01-05
  • Contact: Hui-Qiong Wang, Jin-Cheng Zheng E-mail:hqwang@xmu.edu.cn;jczheng@xmu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. U1332105, 51475396, 11335006, 21103109, 21176152, and 21373137), the Natural Science Foundation of Fujian Province of China (Grant No. 2013J01026), and the Fundamental Research Funds for Central Universities of China (Grant Nos. 2013121012, 20720140517, 20720160013, and 20720160020).

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摘要： Strontium titanate (SrTiO3) is a promising n-type material for thermoelectric applications. However, its relatively high thermal conductivity limits its performance in efficiently converting heat into electrical power through thermoelectric effect. This work shows that the thermal conductivity of SrTiO3 can be effectively reduced by annealing treatments, through an integrated study of laser flash measurement, scanning electron microscopy, Fourier transform infrared spectroscopy, x-ray absorption fine structure, and first-principles calculations. A phonon scattering model is proposed to explain the reduction of thermal conductivity after annealing. This work suggests a promising means to characterize and optimize the material for thermoelectric applications.

关键词: thermal conductivity, SrTiO3, annealing, phonon scattering

Abstract: Strontium titanate (SrTiO3) is a promising n-type material for thermoelectric applications. However, its relatively high thermal conductivity limits its performance in efficiently converting heat into electrical power through thermoelectric effect. This work shows that the thermal conductivity of SrTiO3 can be effectively reduced by annealing treatments, through an integrated study of laser flash measurement, scanning electron microscopy, Fourier transform infrared spectroscopy, x-ray absorption fine structure, and first-principles calculations. A phonon scattering model is proposed to explain the reduction of thermal conductivity after annealing. This work suggests a promising means to characterize and optimize the material for thermoelectric applications.

Key words: thermal conductivity, SrTiO3, annealing, phonon scattering

中图分类号:  (Nonelectronic thermal conduction and heat-pulse propagation in solids;thermal waves)

  • 66.70.-f
81.40.Ef (Cold working, work hardening; annealing, post-deformation annealing, quenching, tempering recovery, and crystallization) 63.20.K- (Phonon interactions) 61.05.cj (X-ray absorption spectroscopy: EXAFS, NEXAFS, XANES, etc.)