کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1619906 1005726 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characterization and optical absorption studies of VO2+:Li2O–K2O–Bi2O3–B2O3 glass system
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Characterization and optical absorption studies of VO2+:Li2O–K2O–Bi2O3–B2O3 glass system
چکیده انگلیسی

Mixed alkali bismuth borate glasses xLi2O–(30 − x) K2O–10Bi2O3–55 B2O3 (0 < x < 30) doped with 5 mol% vanadium ions were prepared from the melts. These glasses were characterized using X-ray diffraction, differential scanning calorimetry and density measurements. Optical absorption studies were carried out as a function of alkali content to look for mixed alkali effect (MAE) on the spectral properties of these glasses. From the study of ultraviolet absorption edge, the optical band gap energies and Urbach energies were evaluated. The average electronic polarizability of the oxide ion, optical basicity and the interaction parameters were also evaluated for all the glasses. Many of these parameters vary non-linearly exhibiting a minima or maxima with increasing alkali concentration, indicating the mixed alkali effect. An attempt is made to interpret MAE in this glass system in terms of its glass structure.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 505, Issue 2, 3 September 2010, Pages 634–639
نویسندگان
, ,