Influence of excess yttrium and platinum on the growth behavior of YBa sub 2 Cu sub 3 O sub 7 sub - delta and Y sub 2 BaCuO sub 5

Influence of excess yttrium and platinum on the growth behavior of YBa sub 2 Cu sub 3 O sub 7 sub - delta and Y sub 2 BaCuO sub 5

The high temp. (1100 degrees C) coarsening of Y sub 2 BaCuO sub 5 (211) and subsequent YBa sub 2 Cu sub 3 O sub 7 sub - delta (123) growth kinetics using melt-quenched and 123 precursor powders are examined via quenching. Fine-scale excess Y addition by sol-gel coating is employed up to 20 mol%. The...

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Veröffentlicht in:Journal of electronic materials 1994-01, Vol.23 (11), p.1093-1102
Hauptverfasser: Fagan, J G, Partis, D A, Richmond-Hope, J A, Amarakoon, V R W
Format: Artikel
Sprache:eng
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Zusammenfassung:The high temp. (1100 degrees C) coarsening of Y sub 2 BaCuO sub 5 (211) and subsequent YBa sub 2 Cu sub 3 O sub 7 sub - delta (123) growth kinetics using melt-quenched and 123 precursor powders are examined via quenching. Fine-scale excess Y addition by sol-gel coating is employed up to 20 mol%. The addition of Y is seen to shift the 211 weight fraction to higher levels for the melt-quenched powders. Refinement of the 211 particle size is seen in the presence of Pt but not with Y addition. 39 refs.
ISSN:0361-5235