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Abstract
The effects of sintering condition and chemical composition on the density, electric and magnetic properties of the Ln-Ba-Cu-O ceramics (Ln = Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu) have been studied. From density measurement, the experimental results show that the highest density was obtained at an optimum sintering temperature which depend on the chemical composition with respective Ln element. Ln-Ba-Cu-O ceramics with Ln = Y, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm and Yb show the superconducting properties at liquid nitrogen temperature. Ceramics sintered at optimum temperature show the lowest resistivity from room temperature to onset temperature and the calculated Jc from the magnetization curves shows highest value of 650 A/cm2.