STRUCTURE AND PHYSICOCHEMICAL PROPERTIES OF Y_2Ba_1-xMxCuO_5(M=Sr,Ca) SOLID SOLUTIONS

摘要

The lattice parameters, thermal expansion ,and electrical conductivity of Y_2Ba_1-xMxCuO_5(M=Sr,Ca;x=0-1) solid solutions were measured at temperatures from 293 to 1073 K in air. The ranges of solid solution are 0≤x≤0.85 in the Y_2Ba_1-xSrxCuO_5 system and 0≤ x≤0.80 in the Y_2Ba_1-xCa_xCuO_5 system. Partial substitution of Sr or Ca for Ba reduces the lattice parameters and thermal expansion and increases the conductivity of Y_2Ba_1-xMxCuO_5.