Crystallization kinetics of glassy Se90In10-xAgx alloys: Observation of Mayer-Neldel rule

Processing and Application of Ceramics

Neeraj Mehta¹  Karishma Singh²  Sudhir Kumar Sharma²  Ashok Kumar² 

[1] Department of Physics, Banaras Hindu University, Varanasi, India;Department of Physics, Harcourt Butler Technological Institute, Kanpur, India;

关键词: chalcogenide glasses;    crystallization kinetics;    activation energy;    Meyer-Neldel rule;   

DOI  :  10.2298/PAC1603137S

来源: DOAJ

【 摘 要 】

Glassy alloys of Se90In10-xAgx were prepared using melt quenching technique. Non-isothermal differential scanning calorimetric (DSC) studies were done on Se90In10-xAgx (x = 0, 2, 4, 6, 8 at.%) glassy alloys at four different heating rates (β = 5, 10, 15, 20 °C/min). Well defined endothermic and exothermic peaks were obtained at glass transition (Tg) and crystallization temperature (Tc), respectively. Augis and Bennett’s method was used to obtain the composition dependent crystallization activation energy (Ec) and the pre-exponential factor (η0) of the Arrhenius expression. A linear dependence between ln η0 and Ec was observed showing the existence of compensation effects of the Meyer-Neldel type. These compensation effects confirm the applicability of MeyerNeldel (MN) rule for the non-isothermal crystallization in the present case.

【 授权许可】

Unknown