کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1475990 991137 2013 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Production and characterization of transparent MgAl2O4 prepared by hot pressing
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Production and characterization of transparent MgAl2O4 prepared by hot pressing
چکیده انگلیسی

Hot pressing has been investigated for the production of transparent MgAl2O4 aimed at the scaling up of the process. Other assessed techniques (hot isostatic pressing, spark plasma sintering) can hardly be used for the production of flat components with large dimensions and good planarity.Hot pressing of stoichiometric Al2O3–MgO powder mixtures has been preferred to the direct pressing of spinel powder for the readily availability of pure powders and to exploit the thermodynamic driving force of the spinel formation. LiF has been used as sintering additive.A thermodynamic investigation of the reactions involving LiF, MgO and Al2O3 has helped in the comprehension of the densification mechanisms affecting the transparency of spinel. Transparencies up to 70% in the visible range (highest value 78% at 1100 nm) have been obtained. Suitable soakings have been added for promoting the initial liquid phase sintering and the release of LiF through formation of vapour phases.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 33, Issue 4, April 2013, Pages 737–747
نویسندگان
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