OBTAINING HIGH-TEMPERATURE SUPERCONDUCTING COMPOUNDS OF BI-CONTAINING COMPOSITION FROM A MELT
Keywords:
ceramics, temperature, microstructure, diffractogram, superconductivity, phase, current, x- ray, valentAbstract
The article presents the results of research on the synthesis of hightemperature superconducting ceramics in a bismuth-containing system based on glass-crystalline and amorphous materials obtained by rapid quenching of the melt under the influence of a radiant flow. Studies of the elemental composition of primary amorphous and glass-crystalline materials have shown that in all samples there is the presence of superstoichiometric oxygen, while in the initial amorphous materials obtained from a melt in the air, the oxygen content is much less than the stoichiometric composition. Perhaps this effect is due to the high solubility of
ozone in the melt, which is formed due to the ionization of oxygen under the influence of the UV component of the radiation flux. In all synthesized samples, the main phase was the htsp phase of the nominal composition Bi1, 7Pb0, 3Sr2Ca2Cu3Oy (2223). At the same time, phases with a higher TC than 2223 are observed.
