METHOD FOR SYNTHESIS OF CUPRATES OF RARE-EARTH ELEMENTS AND BARIUM

摘要

FIELD: chemistry.;SUBSTANCE: invention can be used in synthesis of superconducting materials. Heteropolynuclear complexes of nitrates of rare-earth elements, copper (II), barium and pyridine of the composition Ln(NO₃)₃·2Ba(NO₃)₂·3Cu(NO₃)₂·9(C₅H₅N·HNO₃)·nH₂O, where the lanthanides used are Tb, Dy, Ho, Er, Sm, Eu, Gd, are burnt at 250-300°C, crushed and annealed 900-930°C for such rare-earth elements such as terbium, dysprosium, holmium, erbium, or at 850-880°C for samarium, europium and gadolinium.;EFFECT: invention enables to obtain a superconducting orthorhombic phase of cuprates of rare-earth elements in form of fine-dispersed powder without additional saturation with oxygen.