Kinetics of Ge20Se80â€�?�ð�?�¥Asð‘�? (ð‘�? = 0, 5, 10, 15 and 20) in glass transition region

[摘要] The results of differential scanning calorimetric (DSC) measurements on Ge₂₀Se_{80â€�?�ð�?��?}As_ð‘�? (ð‘�? = 0, 5, 10, 15 and 20) system with the specific aim of investigating the effect of heating rate and composition on glass transition temperature have been discussed. The results indicate that the glass transition temperature (ð‘�??_ð‘�??) is dependent both on the heating rate and composition. The glass transition activation energy (𝐸_ð‘�?) and heat absorbed in glass transition region (𝛥ð�?) are higher for Ge₂₀Se₆₅As₁₅ as compared to the values of other compositions of arsenic. An effort has also been made to develop an empirical model for the composition dependence of 𝛥ð�?. A good agreement has been observed between the experimental values and the results of model calculation.

[学科分类] 材料工程

[关键词] Glass transition temperature;activation energy;heat absorbed;composition dependence.