کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
1548793 1512945 2010 6 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and sintering of beryllium oxide nanoparticles
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موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Synthesis and sintering of beryllium oxide nanoparticles
چکیده انگلیسی

BeO nanoparticles were prepared by polyacrylamide gel route and the sintering properties of synthesized powder as a function of sintering temperature and time were investigated. Thermal behaviors of the polyacrylamide gel and beryllium salt were studied by thermogravimetry analysis (TGA). The calcination temperature (690°C) of the beryllium sulfate covered in polyacrylamide xerogel was almost 150 °C lower than that obtained by traditional methods. The nanocrystallites of the BeO particles were estimated by X-ray diffraction (XRD) according to Debye–Scherrer equation. Transmission electron microscopy (TEM) investigation revealed that the average particle size of the BeO nanoparticles prepared by calcining at 800 °C for 2 h, ranges from 15 nm to 25 nm. The sintering temperature was down to 1 600 °C, which was around 200 °C lower than conventional sintering temperature of the compact sample with common powders. The densification rate was fast at the first 3 h. The thermal conductivity of the sample sintered at 1 600 °C for 6 h was 186.6 W/(m·K).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Progress in Natural Science: Materials International - Volume 20, November 2010, Pages 81–86
نویسندگان
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