✦ LIBER ✦

A study of the formation processes of the 2212 phase in the Bi-based superconductor systems

✍ Scribed by Wai Lo; B.A. Glowacki

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 880 KB
Volume: 193
Category: Article
ISSN: 0921-4534
DOI: 10.1016/0921-4534(92)90726-s

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✦ Synopsis

A study towards the identification of the reactions contributing to and accompanying the formation of the 2212 phase from oxides and carbonates by solid state reaction processes was conducted. The formation processes were investigated by thermal analysis, powder X-ray diffractomet~ and AC magnetic susceptometry. The 2212 phase was found to form from reactions between the 2201 phases (the non-superconducting pseudo-tetragonal and the superconducting monoclinic phases), Bi~CaTOt6, CuO and SrCOa. The 2201 phases were produced by the reactions of Bi-Sr-Cu-O or Bi-Sr-O compounds with SrCO3 or CuO, The 2201 phases could also be formed through the direct reaction between BizCuO4 and SrCO~.

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