Turkish Journal of Physics
Thermal Properties of Amorphous Selenium over the Glass Transition Range
DOI

Abstract
In has been shown that the heat capacity (C_{p}), coefficients of heat conductivity, (\lambda) and thermal expansion, (\alpha), for the amorphous selenium are dependent on the temperature of the transition from glassforming state into a high elasticity condition. On this transition these quantities are increased by AC_{p}=3,47 kal/deg\cdotmol, \Delta\ \lambda=0,32\cdot 10^{3} cal/sec\cdot deg., \delta\alpha=0,79\cdot 10^{5} deg^{1}. These increments are due to the contribution by the increased concentration of holes. Contribution of holes in the glassforming region was calculated using the formulae by Hirai and Eyring for 1 mol of \lq\lq heads", which is equal to C_{p}=3,06 kal/deg\cdotmol. The \lq\lq hole" theory for liquids is used as a strating point in the calculation of the \lambda and \alpha. The obtained resuls are: \lambda =0,28\cdot 10^{3} kal/cm\cdotsec\cdotdeg. \alpha=0,73\cdot 10^{5} deg^{1}. These quantities for C_{p}, \lambda and \alpha are in satisfactory agreement with experimental data.
First Page
253
Last Page
258
Recommended Citation
ISMAIL, Mukhtar Veliev (1997) "Thermal Properties of Amorphous Selenium over the Glass Transition Range," Turkish Journal of Physics: Vol. 21: No. 2, Article 11. Available at: https://journals.tubitak.gov.tr/physics/vol21/iss2/11