Synthesis and characteristics of zirconia fine powders from organic zirconium complexes
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An organic zirconium complex was synthesized from concentrated ZrOCl2 solution and an organic complex which was a mixture of β-glycosyl urea (Schiff’s base) and urea. Homogeneous hydrolysis and controlled polymerization of zirconium-tetramers was accomplished by heating the solution to boiling. Fine ZrO2 and yttrium- or magnesium-stabilized ZrO2 powders were prepared by dehydration and pyrolisis in air. The powders obtained are composed of 0.1 µm particles and were sintered to an above 98% density ceramic with 0.25–0.30 µm grain size.
KeywordsConium Complex Attrition Milling Interparticle Bond Hard Agglomerate Excess Urea
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