Abstract Herein are presented the results of an experimental study of a ternary calcogenide glass of composition: 55 at.% As, 35 at.% Te, 10 at.% Ge. X-ray diffraction measurements of powder samples of the glass were made over a temperature range from room temperature (~23° C) to 440° C. These measurements show the glass to be in a non-cyrstalline amorphous state or short-range order state from room temperature up to a temperature of 220° C. From 220° to approximately 440° the material seems to...

Abstract This thesis presents the qualitative and quantitative procedures used in reflected polarized light microscopy. Conoscopic observations, supported by orthoscopic observations, were used in the analysis of crystals formed in the heat-treated amorphous semiconductor As-Te-Ge. The heat treatment was varied in a successful attempt to obtain larger crystals. This usage of reflected polarized light microscopy elucidated the conditions for which future researchers should strive before attempting...