玻璃稳定性判据研究  

Investigation on Stable Criterion for Glass

作　　者：段仁官[1] 梁开明[1] 

机构地区：[1]清华大学材料科学与工程系,北京100084

出　　处：《无机材料学报》1997年第3期257-264,共8页Journal of Inorganic Materials

摘　　要：本文在前人的玻璃稳定性判据的基础上提出了一种新的玻璃稳定性判据kD（T）=v·exp（－E／RT·D），其中D＝Tc（Tp—Tc）／T1（T1-Tg），kD（T）越小，玻璃越稳定．此判据通过引入修正因子D，从而把热力学因素与动力学因素结合起来．此判据受升温速率影响较小，能适用于不同的温度值，具有普适性，尤其是当频率因子V接近时，此判据显示了更大的优越性，能准确地判别玻璃的稳定性，而此时k（T）或ky（T）判据却不能准确地判别玻璃的稳定性．实验验证了本判据的正确性．On the basis of previous investigation on stable criterion for glass, the authers put forwarda new stable criterion of AD(T) = V' exp(-E/RT· D) [D = Tc(Tp-Tc)/T1(T1-Tg)], whichhas included the kinetic factor and the thermodynamic factor by means of bringing correctionfactor D into the stable criterion k(T). The low value of kD(T) means good stability of the glass.The new criterion kD(T) has little connection with heating rate and can be well used in differentcharacteristic temperature. When values of frequency factor v of glass are near , the criterionespecially can decide the stability of the glass and shows more superiority than the criterion ofk(T) or ky(T), which cannot give a correct judgment about the stability of glass. The correctnessof the new criterion of kD(T) was verified by experiments.

关 键 词：玻璃 稳定性判据 修正因子D 热性质 

分 类 号：TQ171.112[化学工程—玻璃工业]