Processing tetramethylammonium-carbonate-coprecipitated slurries to obtain small-particle-size YBa sub 2 Cu sub 3 O sub 7

Journal Article · Thu Jan 31 23:00:00 EST 1991 · Journal of Materials Research; (USA)

DOI:https://doi.org/10.1557/JMR.1991.0220· OSTI ID:6260261

Spencer, N D; Peders, T S; Baer, M B ^[1]

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1. W. R. Grace Co. -Conn., Research Division, 7379 Route 32, Columbia, Maryland 21044 (US)

The effect of different drying and calcination methods on the ultimate particle size of YBa{sub 2}Cu{sub 3}O{sub 7} (Y-123) has been investigated. The starting material was a tetramethylammonium (TMA) carbonate-precipitated slurry. Spray-drying the slurry after filtering and reslurrying (to remove residual TMA), was most effective in the ultimate formation of finely divided Y-123. The morphology of the spray-dried powder could be preserved by calcining in very low total pressures of flowing oxygen. When a slurry with 0.16% solids content was spray dried, and this powder calcined at 750 {degree}C in 2 Torr of flowing oxygen, a Y-123 powder of mean particle size 0.74 {mu}m (66% submicron) was obtained.

• OSTI ID: 6260261
• Journal Information: Journal of Materials Research; (USA), Journal Name: Journal of Materials Research; (USA) Vol. 6:2; ISSN JMREE; ISSN 0884-2914
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
ALKALINE EARTH METAL COMPOUNDS
AMMONIUM COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CARBON COMPOUNDS
CARBONATES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DISPERSIONS
MIXTURES
MORPHOLOGY
OXIDES
OXYGEN COMPOUNDS
PARTICLES
POWDERS
SLURRIES
SUSPENSIONS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES