FIELD: technology of superconductive ceramic materials. SUBSTANCE: charge is made from the corresponding oxides and carbonates, solid-phase synthesis is carried out. Material prepared is milled, (NH4)2[PtCl6] is added at concentration 0.5-1 wt.- % above stoichiometric metals content in ceramics, compacted and caked at 800-810 C for 22-24 h. EFFECT: value of critical current is 256-275 A.
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