Preparation of the YBa sub 2 Cu sub 3 O sub 7--x Powders by Emulsion Drying Method

The superconducting powders of YBa sub 2 Cu sub 3 O sub 7--x were easily prepared from water-in oil type emulsion by loading the yttrium, Ba, and Cu ions into the aqueous phase. The superconducting orthorhombic phase was formed by calcining at 750 deg C for 10 h in O sub 2 . The size of the supercon...

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Bibliographic Details
Published in:Solid state communications 1989-12, Vol.72 (9), p.881-884
Main Authors: Um, W S, Kim, H G
Format: Article
Language:English
Online Access:Get full text
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Summary:The superconducting powders of YBa sub 2 Cu sub 3 O sub 7--x were easily prepared from water-in oil type emulsion by loading the yttrium, Ba, and Cu ions into the aqueous phase. The superconducting orthorhombic phase was formed by calcining at 750 deg C for 10 h in O sub 2 . The size of the superconducting phase powder was submicron. The density of the sintered specimen using this powder was approx 95% of the theoretical density and the resistance sharply decreases at transition temperature. Diffraction patterns, graphs, photomicrographs. 8 ref.--AA
ISSN:0038-1098