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Rapid Method for the Preparation of 123 Superconductor Using Microwaves
Author(s) -
Warrier Krishna Gopa Kumara,
Varma Hari Krishna,
Mani Themanam Veettil,
Damodaran Alathoor Damodaran
Publication year - 1992
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1992.tb07231.x
Subject(s) - superconductivity , microwave , materials science , analytical chemistry (journal) , mineralogy , chemistry , condensed matter physics , physics , chromatography , quantum mechanics
A novel and rapid method to prepare 123 superconductor powder based on microwave processing is reported. A mixture of the nitrates of Y, Ba, and Cu in 123 stoichiometry when subjected to microwaves of frequency 2.45 GHz for 240 s resulted in an appreciable quantity of tetragonal 123 phase. Annealing for a period of 4 h at 940°C in flowing oxygen formed a superconductor having a T c of 91 K. Sintered pellets of the powder formed by microwave processing have shown transport J c of 105 A/cm 2 .