کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5399255 | 1392675 | 2016 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermal analyzes of phosphate glasses doped with Yb3+ and ZnTe nanocrystals
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
This work studies the thermal properties of a glass matrix called PZABP doped with ZnTe and co-doped with Yb3+ with nominal composition 60P2O5, 15ZnO, 5Al2O3, 10BaO, and 10 PbO (mol%). The presence of ZnTe results in the formation of nanocrystals which are evidenced by optical absorption, X-Ray Diffraction (XRD) and Raman scattering. Thermal lens and Volumetric Heat Capacity techniques were used to investigate thermal diffusivity (D), thermal conductivity (K) and optical path variation with temperature (ds/dT). The outcomes indicate high values for the thermal diffusivity and a relatively small thermal conductivity, i.e., around 2.6Ã10â3Â cm2/s and 3.4Ã10â3Â WÂ cmâ1Â Kâ1, respectively. On the other hand, a low ds/dT value, 1.0Ã10â6Â Kâ1, was obtained as required for an active laser medium. Moreover, it has been observed that the matrix allows high concentration of dopants without compromising its thermal properties. As a result, PZABP glasses may be pointed out as a promising material to applications in high power photonics devices.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 169, Part A, January 2016, Pages 353-358
Journal: Journal of Luminescence - Volume 169, Part A, January 2016, Pages 353-358
نویسندگان
A.M. Freitas, M.J.V. Bell, V. Anjos, A.S. Pinheiro, N.O. Dantas,