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Physical Aging of Arsenic Trisulfide Thick Films and Bulk Materials
Author(s) -
Wang RongPing,
Rode Andrei,
Madden Steve,
LutherDavies Barry
Publication year - 2007
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2007.01603.x
Subject(s) - endothermic process , differential scanning calorimetry , materials science , annealing (glass) , crystallization , activation energy , glass transition , analytical chemistry (journal) , melting point , kinetics , mineralogy , chemical engineering , chemistry , thermodynamics , composite material , polymer , adsorption , organic chemistry , physics , quantum mechanics , engineering
Differential scanning calorimetry (DSC) measurements were performed at different heating rates under nonisothermal conditions to probe the glass transition kinetics of As 2 S 3 bulk glass and thick films. We found that, for films, the glass transition temperature ( T g ) increases with increasing annealing temperature, and sharp crystalline‐like melting endothermic peaks appear in samples annealed at 160°C. Such sharp endothermic peaks could also be found for samples annealed at 140°C for 300 h, indicating a very slow crystallization process. The activation energy for the molecular motions and rearrangements around T g could be estimated as 2.12 eV for films and 2.3 eV for the bulk, respectively.