PREPARATION OF BI-PB-SR-CA-CU TYPE OXIDE SUPERCONDUCTING FILM

摘要

PURPOSE:To obtain the title oxide superconducting film contg. a large amt. of HTc phase by coating a soln. of organometallic compds. contg. Bi, Pb, Sr, Cr, and Cu in a solvent on a surface of a formed body of Ag, Au, or Pt, decom posing the orgnometallic compds. by heating, then half-melting the decomposed product by heating in the air. CONSTITUTION:A formed body having several mu thickness and consisting of Ag, Au, and Pt which is not oxidized at =1000 deg.C is prepared. Organometallic compds. contg. metal element i.e., Bi, Pb, Sr, Ca and Cu, such as naphthenate, octylate, are prepd. separately, wherein atomic rations of each element in the organometallic compds. are regulated to (0.65-0.75):(0.25-0.55):(0.95-1.05):(0.95-1.05):(1.75 -1.85) for Bi:Pb:Sr:Ca:Cu. After coating the surface of the formed body with a soln. mixture of the org. compd. and the solvent, the coated material is heated at 300-600 deg.C in the air to decompose the organometallic compds, thermally. The coated film is further half-melted by heating at 820-840 deg.C in the air, and a Bi-Pb-Sr-Cu type oxide superconducting film is obtd. by cooling.