Superconducting properties and microstructure of YBCO HTSC materials with K2CO3 addition

A. Veneva, I. Nedkov, V. Lovchinov

研究成果: Article

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The influence of K2CO3 additive on the superconducting properties and microstructure of samples with nominal compositions Y1-0.2xBa2-0.2xKxCu3O7-y, Y1Ba2Cu3.5-xKxCu3O7-y, (x=0 to 1.50). were investigated. Only traces of K (1×10-1wt.%) were observed in all samples after the final baking and no proof could be found for alkali metal cations participating in the Perovskite crystal cell. Potassium carbonate eliminated the CuO second phase from the system, because of a KCu-compound formation which evaporated above 900° C. The influence of the K2CO3 was positive for x = 0.40 to 0.75 where we observed homogeneous grain-size ceramic structure and HTSC Y1Ba2Cu3Oy sample with values of Tc = 93.4 K and ΔT = 1.5 k.

元の言語English
ページ(範囲)805-806
ページ数2
ジャーナルPhysica C: Superconductivity and its applications
235-240
発行部数PART 2
DOI
出版物ステータスPublished - 1994 12
外部発表Yes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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