GLASS-FORMING REGIONS OF TERNARY GE-TE-AL AND GE-TE-SB CHALCOGENIDE GLASSES

Glass-forming regions of ternary Ge-Te-Al and Ge-Te-Sb chalcogenide glasses are examined. The Ge-Te-Al glass shows a relatively broad glass-forming region under liquid N2 quenching. Glass transition and crystallization temperatures of Ge-Te-Al glasses are about 170 and 270-degrees-C, respectively, higher than those of binary Ge-Te glass. It is shown that the glass-forming region of Ge-Te-Sb glass is much smaller than that of Ge-Te-Al glass, indicating that the Ge-Te-Al glass has a relatively stable vitreous state and therefore has capabilities applicable to infrared optical fiber material.