Advanced manufacturing process of ultrahigh-purity α-Al2O3
作者： GN Ambaryan , MS Vlaskin , OA Buryakovskaya , SA Kislenko , AZ Zhuk
DOI: 10.1016/J.SUSMAT.2018.E00065
关键词: Impurity 、 Potassium hydroxide 、 Aluminium 、 Thermal treatment 、 Calcination 、 Chemistry 、 Nuclear chemistry 、 Alkali metal 、 Hydrochloric acid 、 Aqueous solution
摘要: Abstract An advanced method was investigated for production of ultrahigh-purity alumina α-Al2O3 (UHPA, 99.999%) with an oxidation aluminum (purity 99.7%) granules in 0.1 g/mol aqueous solution potassium hydroxide a subsequent hydrochloric acid treatment and calcination the product at 1450 °C. The evolution impurities concentration after thermal studied. total especially iron impurity decreased UHPA while alkali metals (K, Na, Li), on contrary, increased by used (Al → reaction acidic + washing treatment). proposed allowed purity 99.99% 99.999% from pellets initial 99.70% respectively. advantage studied is it's low cost utility.
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