Synthesis of solid, spherical zirconia particles by spray pyrolysis

Journal Article · Mon Jan 01 04:00:00 EST 1990 · Journal of the American Ceramic Society; (USA)

DOI:https://doi.org/10.1111/j.1151-2916.1990.tb05091.x· OSTI ID:7060056

Zhang, S C; Messing, G L ^[1]; Borden, M ^[2]

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1. Pennsylvania State Univ., University Park, PA (USA). Dept. of Materials Science and Engineering
2. Perkin-Elmer Corp., Danbury, CT (USA)

A model is used to predict solid particle formation during spray pyrolysis by correlating droplet shrinkage before salt precipitation with its relative solution saturation. For the rapid drying conditions and droplet size of {approximately}10 {mu}m, which are characteristic of conventional spray pyrolysis, solid salt particles are formed when a droplet's initial relative solution saturation is {approximately}10{sup {minus} 2} and the precipitated salt is sufficiently permeable to permit evolution of the remaining solvent after precipitation. It is proposed that this concentration allows the drying droplet more time and a shorter diffusion distance in which to maintain chemical homogeneity before precipitation. Using these concepts it is demonstrated that zirconyl chloride (ZrOCl{sub 2} {center dot} 8H{sub 2}O) and zirconyl hydroxychloride (ZrO(OH)Cl) are excellent zirconium salts for solid zirconia particle synthesis by spray pyrolysis.

• OSTI ID: 7060056
• Journal Information: Journal of the American Ceramic Society; (USA), Journal Name: Journal of the American Ceramic Society; (USA) Vol. 73:1; ISSN 0002-7820; ISSN JACTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
DECOMPOSITION
DRYING
HALIDES
HALOGEN COMPOUNDS
KINETICS
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS
REACTION KINETICS
SPRAY DRYING
SYNTHESIS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM CHLORIDES
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES