کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5438226 | 1398182 | 2017 | 21 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optical and electrical studies of borosilicate glass containing vanadium and cobalt ions for smart windows applications
ترجمه فارسی عنوان
مطالعات اپتیکی و الکتریکی از شیشه بوروسیلیکات حاوی یونان وانادیم و کبالت برای برنامه های کاربردی هوشمند
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
Borosilicate glass with different concentrations of vanadium and cobalt of the composition (mol%) 40 Na2B4O7- 40 SiO2- (20-x) V2O5- x Co2O3, with x=0, 1, 3 and 5Â mol% were prepared by melt quenching technique at 1373Â K and investigated by X-ray diffraction (XRD) and FTIR spectroscopy. Optical properties of the obtained borosilicate glasses in the UV-vis range were also investigated. Urbach theory has been used to analyze the optical data. The dc electrical conductivity was investigated for all samples in the temperature range from 298Â K to 700Â K. The ac electrical conductivity was measured in the frequency range from 50Â Hz to 2Â MHz from 298 to 523Â K. Guntini's theory has been used to analyze the electrical data. It was found that Urbach energy decreases with the increase of vanadium content, the sample with x=0 shows the highest absorption in the visible and IR region and an electrical conductivity in the order of 10â2Â Scmâ1. The frequency exponent was calculated. A semiconducting behavior has been assessed for the studied glasses. The sample with x=0 has the highest IR absorption, the highest conductivity, at 323Â K at different frequencies, and the lowest activation energy; these features are promising for smart windows applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 43, Issue 2, 1 February 2017, Pages 1795-1801
Journal: Ceramics International - Volume 43, Issue 2, 1 February 2017, Pages 1795-1801
نویسندگان
M.Y. Hassaan, H.M. Osman, H.H. Hassan, A.S. El-Deeb, M.A. Helal,