کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10625297 | 989622 | 2014 | 34 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microwave dielectric and thermal properties of mixed rare earth ortho phosphate [REmixPO4]
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Microwave dielectric and thermal properties of mixed rare earth ortho phosphate [REmixPO4] Microwave dielectric and thermal properties of mixed rare earth ortho phosphate [REmixPO4]](/preview/png/10625297.png)
چکیده انگلیسی
A cost effective protocol to develop microwave substrate is proposed whereby a mixed rare earth orthophosphate [REMIXPO4] ceramic was prepared using a natural mixture of rare earth oxides, which is a byproduct derived from beach sand after thorium extraction. The Rietveld refinement of X-ray powder diffraction pattern confirms that the compound belongs to P21/n space group with monoclinic crystal symmetry. The scanning electron microscopy combined with energy dispersive X-ray analysis was performed to study the surface morphological characteristics. The ceramic sintered at 1250 °C showed a relative permittivity (εr) of 9.6 (at 13.5 GHz), high quality factor (QuÃf) of 45,200 GHz and a Ïf of â35 ppm/°C. The room temperature thermal conductivity of the sintered ceramic is 3.25 Wmâ1 Kâ1 while the average coefficient of thermal expansion (CTE) is 7.3 ppm/°C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 40, Issue 8, Part B, September 2014, Pages 13075-13081
Journal: Ceramics International - Volume 40, Issue 8, Part B, September 2014, Pages 13075-13081
نویسندگان
Bahuleyan Arun, Jobin Varghese, Kuzhichalil Peethambharan Surendran, Mailadil Thomas Sebastian,