Crystallization study of Te�?�Bi�?�Se glasses

[摘要] Crystallization studies are carried out under non-isothermal conditions with samples heated at several uniform rates. The dependence of the glass transition temperature (ð‘�??_ð‘�??), the crystalline temperature (ð‘�??_ð‘�?) and the peak temperature of crystallization (ð‘�??_ð‘�?) on the composition and heating rate (ð›�?) has been studied. For a memory/switching material, the thermal stability and ease of glass formation are of crucial importance. The glass transition temperature, ð‘�??_ð‘�??, increases slightly with the variation of Bi content. From the heating rate dependence of ð‘�??_ð‘�??, the activation energy for glass transition (𝐸_ð‘�?) has been evaluated. The results are discussed on the basis of Kissinger’s approach and are interpreted using the chemically ordered network model (CONM).

[学科分类] 材料工程

[关键词] Thermal stability;chalcogenide glasses;glass forming ability;glass transition temperature.