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Superconducting properties and microstructure of YBCO HTSC materials with K2CO3 addition

✍ Scribed by A. Veneva; I. Nedkov; V. Lovchinov

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
358 KB
Volume
235-240
Category
Article
ISSN
0921-4534

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✦ Synopsis

were investigated. Only traces of K (lxl0 "2 wt.%) were observed in all samples after the final baking and no proof could be found for alkali metal cations participating in the Perovsldte crystal cell. Potassium carbonate eliminated the CuO second phase from the system, because of a KCu-compound formation which evaporated above 900 Β° C. The influence of the K2CO s was positive for x = 0.40 to 0.75 where we observed homogenous grain-size ceramic structure and ItTSC Y1B%Cus@ samples with values of T c = 93.4 K and AT = 1.5 K.

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