PROCESS FOR OBTAINING A GLASS-CERAMIC MATERIAL THAT IS OPTICALLY TRANSPARENT IN THE INFRARED
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United States of America Patent
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Issued Date -
Jan 2, 2014
app pub date -
Dec 6, 2011
filing date -
Dec 6, 2010
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Abstract
A process is provided for obtaining a glassy material that is optically transparent to infrared radiation. The process includes: a step of amorphization, by mechanosynthesis, of an assembly of starting elements including at least one metallic element and at least one chalcogenide element, making it possible to form an amorphous powder; a step of hot densification, in a mould of predetermined dimensions, of the amorphous powder, making it possible to obtain a glass; and heat treatment, carried out during or after the hot densification step, in which the glass is heated to a temperature at which a portion of the glass is converted from an amorphous state to a crystalline state, making it possible to obtain, after cooling, a glass-ceramic.
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