【摘要】 采用差式扫描量热法 (DSC)和热机械分析 (TMA)方法研究了P2 O5SiO2 Na2 OAl2 O3玻璃系统的热力学性质 ,探讨了磷酸盐玻璃中不同二氧化硅含量对其特征温度、热膨胀系数的影响 .研究表明 ,随着SiO2 的增加 ,玻璃转变温度Tg 及玻璃软化温度Tf 逐渐升高 ,热膨胀系数逐渐降低 .更多还原

【Abstract】 The thermodynamic properties of P₂O₅-SiO₂-Na₂O-Al₂O₃ glass system were investigated by means of differential scanning calorimetry and thermo-mechanical analysis. The characteristic temperature and the thermal expansion coefficient of the system with different SiO₂ contents were then discussed. The results indicate that,with the increase in SiO₂ content,the transition temperature （T_g） and soft temperature （T_f） of the glass increase accordingly,while the thermal expansion coefficient decreases.更多还原