FIELD: inorganic chemistry. SUBSTANCE: cuprates of rare-earth elements and cuprate of barium are calcined within 10-15 min at 930-935 C. Tetragonal phase is prepared by hardening, and rhombic phase is prepared by annealing in the medium of oxygen. EFFECT: improves efficiency of the method. 3 cl
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Authors
Dates
1997-01-10—Published
1991-07-22—Filed