کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1813898 | 1525249 | 2008 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Nickel ion as a structural probe in PbO-Bi2O3-B2O3 glass system by means of spectroscopic and dielectric studies
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
PbO- Bi2O3-B2O3 glasses containing different concentrations of NiO (ranging from 0 to 1.5 mol%) are prepared. A number of studies viz., spectroscopic (infrared, optical absorption spectra), magnetic susceptibility and dielectric properties (constant εâ², loss tan δ, ac conductivity Ïac over a range of frequency and temperature) of these glasses have been carried out. The optical absorption, magnetic susceptibility and IR spectral studies point out that nickel ions occupy both tetrahedral and octahedral positions in the glass network; the later positions seem to be dominant when the concentration of NiO is raised beyond 1.0 mol% in the glass matrix. The studies of dielectric properties reveal that the presence of nickel oxide in the glass network causes a considerable improvement in the insulating strength of these glasses when the concentration of NiO â¼1.0 mol%. The analysis of the results of all these studies further indicate that the glasses containing more than 1.0 mol% of NiO are suitable for getting laser emission due to 3T2(F)â3A2(F) transition in NIR region.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 403, Issues 19â20, 1 October 2008, Pages 3751-3759
Journal: Physica B: Condensed Matter - Volume 403, Issues 19â20, 1 October 2008, Pages 3751-3759
نویسندگان
P. Venkateswara Rao, T. Satyanarayana, M. Srinivasa Reddy, Y. Gandhi, N. Veeraiah,