A new method for measuring the Seebeck coefficient of thermoelectric materials

作者：Miao Ting Ting^*; Ma Wei Gang; Li Zhen; Zhang Xing

来源：Journal of Engineering Thermophysics, 2011, 32(4): 629-633.

• Heat conduction equations
• K-type thermocouples
• Seebeck
• Seebeck voltage
• Self-heating
• Temperature fluctuation
• Thermoelectric material

A novel and reliable self-heating 2ω method has been proposed to measure the Seebeck coefficient of the micro/nano scale thermoelectric materials. Feeding an ac electric current at the frequency of 1ω into the specimen creates a temperature fluctuation at the frequency of 2ω, and according to the Seebeck effect, a Seebeck voltage fluctuation is generated at 2ω. Combining the measured 2ω voltage and the theoretical analysis of the transient heat-conduction equation, the Seebeck coefficient of the thermoelectric material can be obtained. This approach has been applied to a 25.4 μm thick K-type thermocouple and the measured Seebeck coefficient corresponds well with the nominal value.

• 出版日期2011
• 单位清华大学