Abstract
Curves of reaction rate versus temperature for constant heating rates (ϕ=1–10°C/min) constructed by analytical methods have been used to demonstrate the crystallization kinetics of amorphous solid TeSe20. The devitrification process takes place with predominance of random nucleation and one-dimensional growth, and is limited by combined switching and splitting of the chemical bonds. The mean value for the activation energy of the amorphouscrystal transformation,Ē, is found to be 64 Kcal/mole. While the quantityE calculated on the basis of d.c. conductivity changes during different isothermal crystallization (120–175°C) in supercooled liquid TeSe20 amounts to 11.5 Kcal/mole and suggests the existence of mixed chains in the liquid alloys.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
E. Grison, J. Chem. Phys.,19, 1109, 1951.
J. Schottmiller, M. Tabak, G. Lucovsky undA. Ward, J. Non-Cryst. Solids,4, 80, 1970.
H. P. D. Lanyon, The Physics of Selenium and Tellurium, Ed. W. C. Cooper, Pergamon Press, 1969, p. 205.
P. Boolchand undP. Suranyi, Phys. Rev.,B7, 57, 1973.
H. Thurn undJ. Ruska, J. Non-Cryst. Solids,22 331, 1976.
R. C. Mackenzi, Differential Thermal Analysis, Academic Press, New York, 1970.
M. Avrami, J. Chem. Phys.,8, 212, 1940.
H. E. Kissinger, Anal. Chem.,29, 1702, 1957.
M. G. Scott undP. Ramachandrarao, Mat. Sci. and Engin,29, 137, 1977.
H. J. Borchard undF. Daniels, J. Am. Chem. Soc.,79, 41, 1957.
H. J. Borchard, J. Inorg. Nucl. Chem.,12, 252, 1960.
V. Satava undF. J. Skvára, J. Am. Ceram. Soc.,52, 591, 1969.
F. O. Piloyan, I. O. Ryabchikov undO. S. Novikova, Nature,212, 1229, 1966.
J. Sesták, Thermochimica Acta,3, 150, 1971.
J. Sesták, Phys. and Chem. of glasses,15, 137, 1974.
J. H. Shapp, H. W. Brindley undN. N. Achar, J. Am. Ceram. Soc.,49, 379, 1966.
M. K. El-Mously, Neorg. Mater. (USSR),13, 1587, 1977.
M. K. El-Mously, M. F. Kotkata andS. A. Salam, J. Phys.,C 11, 1077, 1978.
Author information
Authors and Affiliations
Additional information
Published in the ICTP Internal Report, Miramare-Trieste, IC/79/66, July 1979.
Rights and permissions
About this article
Cite this article
Kotkata, M.F., Mahmoud, E.A. & El-Mously, M.K. Kinetics of crystal growth in amorphous solid and supercooled liquid TeSe20 using DTA and d.c. Conductivity measurements. Acta Physica 47, 345–352 (1979). https://doi.org/10.1007/BF03158233
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF03158233