Preparation of monodisperse zirconia particles by thermal hydrolysis in highly concentrated solutions

Journal Article · Mon Apr 01 04:00:00 EST 1996 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1996.tb08534.x· OSTI ID:247916

Kato, Etsuro; Hirano, Masanori; Kobayashi, Yuichi; Asoh, Keisuke; Mori, Makoto; Nakata, Masato ^[1]

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1. Aichi Inst. of Tech., Toyota (Japan). Dept. of Applied Chemistry

Monodisperse zirconia particles were prepared by the thermal hydrolysis of mixtures of zirconyl chloride, zirconium hydroxide, and water at high concentrations corresponding to about 5 mol/L Zr. The particles, as first prepared, were temporarily agglomerated spheres composed of primary ultrafine zirconia crystals. The agglomerated particles collapsed and dispersed in water to form a translucent sol. When vacuum dried and followed by heat treatment, they were not dispersible. The size of the agglomerated particles increased with increasing molar ratio of the zirconium chloride in the starting mixture, varying from about 0.2 to 0.6 {micro}m. Using the sample thus obtained, monodisperse tetragonal zirconia particles of about 0.35 {micro}m containing 3 mol% Y{sub 2}O{sub 3} with a relatively uniform composition were obtained by homogeneous precipitation of YOHCO{sub 3} by heating with urea and calcination at 800 C.

• Sponsoring Organization: USDOE
• OSTI ID: 247916
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 4 Vol. 79; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AQUEOUS SOLUTIONS
CALCINATION
CHLORIDES
HYDROXIDES
PARTICLE SIZE
PARTICULATES
PRECIPITATION
SOLID SOLUTIONS
SOLS
SYNTHESIS
TETRAGONAL LATTICES
UREA
YTTRIUM OXIDES
ZIRCONIUM OXIDES