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THERMAL AND MECHANICAL PROPERTIS OF SOME THALLIUM CONTAINING CHALCOGENIDES

K. Petkov1,* , E. Cernoskovaa2, D. Kozhuharova1

Affiliation

  1. Central Laboratory of Photoprocesses, Bulgarian Academy of Sciences, Acad. G. Bonchev St., bl. 109, 1113 Sofia, Bulgaria
  2. Joint Laboratory of Solid State Chemistry of Institute of Macromolecular Chemistry of Czech Academy of Science and University of Pardubice, Studentska 84, 53009 Pardubice, Czeh Republic

Abstract

The results of differential thermal analysis (DTA) and differential scanning calorimetric (DSC) measurement as well as of measurements of the microhardness (Hk) on chalcogenide thin films and bulk samples from the systems As-S-Tl and Ge-S-Tl in wide range of concentrations are reported. The dependence of Hk on composition shows an increase in the hardness with the rise of the As and Ge content for the first two systems and a very large decrease in it when the Tl content increases. It is also found that the glass-transition temperature of bulk samples as well as thin films decreases when Tl content increases. No influence of the vacuum deposition conditions of thin films on the microhardness has been observed. It was shown that a correlation exists between the mechanical and thermal properties of the studied chalcogenide systems..

Keywords

Chalcogenide glasses, DTA, DSC, Microhardness, Thallium chalcogenides.

Submitted at: Oct. 7, 2003
Accepted at: March 15, 2004

Citation

K. Petkov, E. Cernoskovaa, D. Kozhuharova, THERMAL AND MECHANICAL PROPERTIS OF SOME THALLIUM CONTAINING CHALCOGENIDES, Journal of Optoelectronics and Advanced Materials Vol. 6, Iss. 1, pp. 149-155 (2004)