کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1475093 991108 2012 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Transparent alumina by vacuum sintering
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Transparent alumina by vacuum sintering
چکیده انگلیسی

Alumina windows transparent in IR range and translucent in UV range were obtained by high vacuum sintering (∼10–6 mbar). To determine the influence of the atmosphere on grain growth, a sintering kinetics and intragranular porosity studies have been performed for samples sintered in air and in high vacuum atmospheres. It has been established that by using high vacuum sintering instead of the conventional one in air, alumina compacts with lower grain size, less impurities in grain boundaries and less quantity of intragranular pores were obtained. It has been proven that high vacuum sintering allows to reach high densities (>99%th) without exaggerated grain growth (d50 < 1 μm). Finally, strong correlation between microstructure and light transparency has been found and consequently it can be concluded that vacuum sintering clearly enhances the optical properties of alumina.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 32, Issue 11, August 2012, Pages 2925–2933
نویسندگان
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