Eur. Phys. J. Appl. Phys.
Volume 24, Number 1, October 2003
|Page(s)||33 - 36|
|Section||Imaging, Microscopy and Spectroscopy|
|Published online||16 July 2003|
Calorimetric studies of bulk Se-Te-Pb glassy system
Semiconductors Laboratory, Department of Applied Physics,
Guru Nanak Dev University, Amritsar, 143005, India
Corresponding author: email@example.com
Revised: 12 May 2003
Accepted: 2 June 2003
Published online: 16 July 2003
Calorimetric studies have been performed on the Se Te20 Pbx () samples at different heating rates (5−20 °C/min). The glass transition temperature Tg, the peak crystallization temperature Tp, and the melting temperature Tm are found to increase with increase in heating rate. The apparent activation energies for glass transition Et and for crystallization Ec have been calculated from the heating rate dependence of Tg and Tp respectively. The effect of Pb addition to the Se-Te matrix on the mechanism of crystal growth has been investigated. The glass transition temperature Tg and the peak crystallization temperature Tp initially decrease with small addition of Pb (x = 0.6) but increases with further addition of Pb (x > 0.6). The thermal stability and glass-forming tendency have also been studied.
PACS: 77.84.Bw – Elements, oxides, nitrides, borides, carbides, chalcogenides, etc. / 64.70.Pf – Glass transitions / 68.60.Dv – Thermal stability; thermal effects
© EDP Sciences, 2003
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