Morphology control in precursor ceramic powder production by the Electrical Dispersion Reactor

Conference · Mon Jan 01 00:00:00 EST 1990

OSTI ID:7198404

Harris, M T; Scott, T C; Basaran, O A; Byers, C H

The Electrical Dispersion Reactor (EDR) allows the continuous production of composite oxide ceramic precursor materials. Silica particles in the form of highly porous shells are produced by the hydrolysis of tetraethylorthosilicate as the continuous phase and water-ammonia as the disperse phase, reflecting the diffusion of the silicon moiety into the dispersed phase. Alternately, denser silica particles result when aqueous solutions of sodium metasilicate are dispersed in a continuous phase containing acetic acid in 2-ethyl-1-hexanol. Additionally, spherical particles in the size range 0.1 to 2 microns are produced from the dispersion of aqueous solutions containing cupric chloride or a mixture of cupric chloride, yttrium nitrate, and barium nitrate (3:1:2 molar ratio) into a continuous organic phase containing ammonia. 5 refs., 4 figs.

• Research Organization: Oak Ridge National Lab., TN (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 7198404
• Report Number(s): CONF-900466-3; ON: DE90009472
• Resource Relation: Conference: Spring meeting of the Materials Research Society, San Francisco, CA (USA), 16-21 Apr 1990
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
OXIDES
SYNTHESIS
POWDERS
AQUEOUS SOLUTIONS
DISPERSIONS
DROPLETS
ELECTRIC FIELDS
ELECTROMETALLURGY
MORPHOLOGY
PARTICLE SIZE
SILICA
CHALCOGENIDES
METALLURGY
MINERALS
MIXTURES
OXIDE MINERALS
OXYGEN COMPOUNDS
PARTICLES
SILICON COMPOUNDS
SILICON OXIDES
SIZE
SOLUTIONS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies