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Processing tetramethylammonium-carbonate-coprecipitated slurries to obtain small-particle-size YBa2Cu3O7

Published online by Cambridge University Press:  31 January 2011

Nicholas D. Spencer ,
Thorvald S. Peders  and
Matthew B. Baer
Nicholas D. Spencer
Affiliation:
W.R. Grace & Co.-Conn. Research Division, 7379 Route 32, Columbia, Maryland 21044
Thorvald S. Peders
Affiliation:
W.R. Grace & Co.-Conn. Research Division, 7379 Route 32, Columbia, Maryland 21044
Matthew B. Baer
Affiliation:
W.R. Grace & Co.-Conn. Research Division, 7379 Route 32, Columbia, Maryland 21044
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Abstract

The effect of different drying and calcination methods on the ultimate particle size of YBa2Cu3O7 (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 °C in 2 Torr of flowing oxygen, a Y-123 powder of mean particle size 0.74 μm (66% submicron) was obtained.

Type
Articles
Information
Journal of Materials Research , Volume 6 , Issue 2 , February 1991 , pp. 220 - 226
Copyright
Copyright © Materials Research Society 1991

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