Preparation of Superconducting Bi2Sr2CaCu2Ox Ceramics by Low-Temperature Heat Treatment
- 1 April 1991
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 30 (4B) , L697-699
- https://doi.org/10.1143/jjap.30.l697
Abstract
Superconducting ceramic rods (T c≈80 K) of Bi2Sr2CaCu2O x were successfully prepared by heat treatment in air at 700°C for 20-50 h; the temperature of 700°C is believed to be the lowest temperature reported so far. The precursor rod specimens were made by vacuum casting the stoichiometric melts into silica tubes; the as-cast rods are spontaneously devitrified during cooling and are composed of crystalline phases of Bi2Sr2CuO x (2201 phase) and small amounts of Cu2O and unidentified crystalline phases.Keywords
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