Haifeng Zhang et al 2003 Meas. Sci. Technol. 14 1396 doi:10.1088/0957-0233/14/8/327
A dual-thermistor probe for absolute measurement of thermal diffusivity and thermal conductivity by the heat pulse method
Haifeng Zhang1, Liqun He, Shuxia Cheng, Zaiteng Zhai and Dayong Gao
Show affiliationsBased on a transient thermal model of a point heat pulse, a dual-thermistor probe, in which two thermistor beads serve as point heater and temperature sensor respectively, has been developed for absolute measurement of thermal diffusivity and conductivity. An experimental system with high sensitivity for temperature change is designed to perform the measurement. Experimental results of samples are in agreement with the recommended values. The validation of the one-dimensional point source heat transfer is discussed, and the deviation from the theoretical model is negligibly small for the measurement. The estimated measurement uncertainties are 3.5% and 5.3% for thermal diffusivity and conductivity respectively.
- PACS
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07.20.-n Thermal instruments and apparatus
05.70.Ce Thermodynamic functions and equations of state
07.07.Df Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing
47.27.T- Turbulent transport processes
84.32.Ff Conductors, resistors (including thermistors, varistors, and photoresistors)
- Subjects
- Dates
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Issue 8 (August 2003)
Received 9 April 2003, accepted for publication 9 June 2003, in final form 28 May 2003
Published 16 July 2003
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A dual-thermistor probe for absolute measurement of thermal diffusivity and thermal conductivity by the heat pulse method
Haifeng Zhang et al 2003 Meas. Sci. Technol. 14 1396
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