Chatterjee, Minati and Ray, J and Chatterjee, A and Ganguli, Dibyendu (1992) High purity zirconia powders via wet chemical processing: A comparative study. Ceramics International, 18 (5). pp. 337-342. ISSN 0272-8842

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Comparison has been made of the achievable purity levels and agglomeration characteristics of zirconia powders obtained via six different wet chemical routes where the starting material was an impure Zr-oxychloride solution obtained from Indian zircon sand. For the highest purity (2-15 ppm of other oxides except Hf), two routes were found to be effective: crystallization of the oxychloride via the basic sulphate, or double crystallization of the oxychloride, followed by dissolution and hydroxide precipitation. The average agglomerate size was the largest (10-15 mum) for the powders obtained by direct decomposition of the basic sulphate at 1000-degrees-C, though the size distribution was narrow and distinctly monomodal. For smaller agglomerates (1.5-2.5 mum), on the other hand, the size distribution was very wide. Calcination at 800-degrees-C of powders obtained via hydroxide precipitation from a solution always yielded only tetragonal zirconia as the crystalline phase.

Item Type: Article
Subjects: Engineering Materials
Divisions: Sol Gel
Depositing User: Bidhan Chaudhuri
Date Deposited: 27 Nov 2013 09:15
Last Modified: 20 Mar 2016 13:39

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