塞贝克系数
热电效应
材料科学
热电材料
热电发电机
纳米尺度
冶金
复合材料
纳米技术
热导率
热力学
物理
作者
Shipeng Shen,Yisheng Chai,Shouguo Wang,Chuansen Yang,Dashan Shang,Young Sun
摘要
Thermoelectric power of nanoscale materials could be greatly enhanced than that of their bulks, but its precise measurement becomes a challenging problem. A setup designed for directly characterizing the thermoelectric properties of powder samples was constructed. As a demonstration, we measured the thermoelectric potential of β-MnO2 sample in different powder forms around room temperature. The β-MnO2 powder ground in the air has a much larger thermopower than that in the as-bought sample or powder ground in the dry Ar atmosphere. It was concluded that the Seebeck coefficient of β-MnO2 powder can be greatly affected in the air due to a possible electrochemical reaction with H2O vapor.
科研通智能强力驱动
Strongly Powered by AbleSci AI