中文摘要：

为了研究成分对Ge—Se—Sb玻璃的转变温度（Tg），热膨胀系数（a）和软化点（Tsoft）的影响，采用差示扫描量热法（DSC）和热机械分析（TMA）两种技术对GexSe90-xSb10与GexSe80-xSb20系列硫系玻璃进行了测试研究．结果表明：当Ge原子数分数含量小于25％时，随其含量的增加，GexSe90-xSb10玻璃的转变温度Tg从260℃增加到320℃，软化点Tsoft从289℃增加到350℃．GexSe80-xSb20玻璃的Tg点从193℃增加到258℃，Tsoft点从201℃增加到269℃，但两者的热膨胀系数均随Ge含量增加而逐渐减小，其原因与Ge单质的高熔点和低膨胀系数性质有关．TMA测得的Tg点比DSC测试结果低约10℃．若考察玻璃结构变化特性应参考DSC结果，而对玻璃进行成型加工设计应参考TMA结果．

英文摘要：

To study the effect of composition on the glass transition point （Tg）, expansion coefficient （α） and softening point （Tsoft） of Ge-Se-Sb glass,GexSe90-xSb10 and GexSe80-xSb20 glasses are investigated by DSC and TMA techniques. The results show： If Ge%25 %, with increase of Ge, Tg of GexSe90-x Sbl0 increases from 260 ℃ to 320 ℃, Tsoft increases from 289 ℃ to 350 ℃. For Ge.Se80-xSb20 glass, Tg increases from 193 ℃ to 258 ℃,and Tsof, increases from 201 ℃ to 269 ℃. Both expansion coefficient of the two glasses decreases with increase of Ge content. It is attributed to the high melting point and low expansion coefficient of Ge. In addition, Tg of TMA is 10 ℃ lower than that of DSC result . But both of them are useful,DSC result is for studying the structure transition and TMA result is for designing the formation process.