The effect of processing parameters for decomposition of cryochemical salt product in the Ni-Pb-Sr-Ca-Cu-O system on the structure and properties of ceramics

摘要

The effect of temperature and time for decomposition of a sult product on phase composition, microstructure and magnetizability of superconductive Bi-Pb-Sr-Ca-Cu-O ceramics. Heating at the temperature of 570℃ slows down formation of high-temperature phases, and temperature elevation up to 840℃ and decomposition time increase at 815℃ gives the same effect on Ca{sub}2PbO{sub}4, CuO and (CaSr){sub}2CuO{sub}3 phases content. The magnetizability data obtained in combination with microscopic and X-ray examinations enable to estimate the effect on grain morphology and boundaries of the latter on super conductivity of sintered specimens.