Abstract:

The computer-aid procedure in dealing with the cooling data with the steady-state method for thermal conductivity measurement based on data analysis and Origin software is introduced. The theory basis fitting the cooling curve with the assist of Origin is derived. According to the Newton's law of cooling,the derived relation between cooling temperature and time is in multinomial form. Therefore,the multinomial fitting is chosen when fitting the cooling curve with the assist of computer and software. And generally,the two order multinomial fitting is enough to meet with the criterion in accuracy.

Key words: steady-state method, thermal conductivity, fitting, cooling rate