Polymorphous-Crystalloid Structure and Relaxation Processes in Some Chalcogenide Glass-Forming Substances
RESEARCH INST OF MATERIAL SCIENCE AND TECHNOLOGY MOSCOW (RUSSIA)
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The nature of vitreous state can not be perceived deeply without analysis of crystal and liquid states, without analysis of structure in these states, without understanding of ways and means of mutual transformations of these three states, as well as transformations inside them that take place under influence of such external influences as temperature, pressure, electromagnetic radiation, etc. As a matter of fact such transformations of various states phase transformations and transformations inside each of them phase transformations in crystal state, structural transformations in liquid and vitreous states represent relaxation of substance, i.e. the process of establishment of thermodynamic equilibrium complete or partial in a physical system consisting of a large number of particles. In this work phenomenological aspects of relaxation processes taking place, mainly, in individual chemical substances based on chalcogenides of IV and V main subgroups of the Periodic Table as well as in chalcogene Se are considered. Special attention is given to the most deeply investigated germanium diselenide GeSe2.
- Polymer Chemistry
- Ceramics, Refractories and Glass