Jpn. J. Appl. Phys. 27 (1988) pp. L2293-L2295 |Next Article| |Table of Contents|
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Letter
Preparation of High-Tc Superconducting Bi-Pb-Sr-Ca-Cu-O Ceramics by the Melt Quenching Method
Takayuki Komatsu,
Ryuji Sato,
Chisai Hirose,
Kazumasa Matusita and
Tsutomu Yamashita1
Department of Chemistry, Nagaoka University of Technology
1Department of Electronics, Nagaoka University of Technology
(Received October 25, 1988; accepted for publication November 15, 1988)
We prepared superconducting Bi0.8Pb0.2SrCaCu2Oy ceramics using the melt quenching method and examined the effect of annealing conditions on the formation of high-Tc phases. It was found from the changes in inductance and X-ray powder diffraction analyses that prolonged annealing at 830°C was very effective in increasing the volume fraction of high-Tc phases. The samples annealed at 830°C for 200 h and 250 h in air exhibited superconductivity with a Tc(zero)=100 K and critical current densities (77 K, zero magnetic field) of 35∼50 A/cm2.
URL:
http://jjap.jsap.jp/link?JJAP/27/L2293/
DOI: 10.1143/JJAP.27.L2293
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