TDTR法测量高压高温下ZnO各向异性热导率  

Anisotropic Thermal Conductivity of ZnO at High Pressure and High Temperature by TDTR Method

作　　者：樊轩辉 张中印 周敬 苑昆鹏 祝捷 唐大伟 FAN Xuanhui;ZHANG Zhongyin;ZHOU Jing;YUAN Kunpeng;ZHU Jie;TANG Dawei(Dalian University of Technology School of energy and power,Dalian 11600,China)

机构地区：[1]大连理工大学能源与动力学院,大连116000

出　　处：《工程热物理学报》2023年第10期2866-2871,共6页Journal of Engineering Thermophysics

基　　金：国家自然科学基金重点国际合作项目(No.51720105007);国家自然科学基金资助项目(No.51976025);中央高校基本科研业务费资助项目(No.DUT22ZD216)。

摘　　要：采用飞秒激光时域热反射法结合金刚石对顶砧装置与高温热台装置,实现了在0~8 GPa以及300~873 K下不同晶向ZnO的热性能表征。发现高压和高温下铅锌矿ZnO的热导率均存在各向异性,且热导率的压力依赖性呈非单调变化,热导率的温度依赖性呈单调变化。该研究有助于对高压和高温下宽带隙半导体的内部热输运机理的深入理解,并为寻找高热电优值材料提供思路。The thermal properties of ZnO with different crystal orientations were characterized by the time-domain thermoreflectance method combined with a diamond anvil cell and a heating stage in 0~8 GPa and 300~873 K.It is found that the thermal conductivity of wurtzite ZnO is anisotropic under both high pressure and high temperature conditions.Meanwhile,the pressure dependence of the thermal conductivity is non-monotonic,while the temperature dependence of the thermal conductivity is monotonic.This research can provide useful insights into the internal heat transport mechanism of wide band-gap semiconductors under high pressure and high temperature,and give ideas for searching for materials with high thermoelectric figure of merit.

关 键 词：飞秒激光时域热反射法 金刚石对顶砧 热导率 各向异性 氧化锌 

分 类 号：O52[理学—高压高温物理]