کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1622568 1516401 2009 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Measurements of DSC isothermal crystallization kinetics in amorphous selenium bulk samples
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Measurements of DSC isothermal crystallization kinetics in amorphous selenium bulk samples
چکیده انگلیسی
In this research, the activation energies of crystallization of amorphous selenium (Se) were studied under isothermal conditions using a differential scanning calorimetric (DSC) technique. The activation energy for crystallization was determined to be 77 ± 6 kJ mol−1. The Avrami exponent was found to be about 2 for an annealing temperature of T ≤ 361 K, indicating two-dimensional growth. As the annealing temperature increases beyond 365 K, the Avrami exponent mostly gives values more than 2.5, indicating three-dimensional growth. The effects of annealing were revealed by studying the morphology of the samples with a scanning electron microscope (SEM).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 476, Issues 1–2, 12 May 2009, Pages 348-351
نویسندگان
, , ,