论文信息 - Formation process of high Tc superconducting Bi‐Pb‐Ca‐Sr‐Cu‐O thick films via melt solidification

Formation process of high Tc superconducting Bi‐Pb‐Ca‐Sr‐Cu‐O thick films via melt solidification

High Tc superconducting thick films Bi1.6Pb0.4Ca2Sr2Cu3Ox were prepared by the melt solidification process. The preparation conditions were optimized to obtain films with higher Tc. Rapid cooling of the molten samples to the heat treatment temperature of 855 °C produced superconducting films with a maximum Tc (zero) of 104 K. Slow cooling of the melt declined the superconducting properties of the films because of the formation of Ca2CuO3, which may prevent the formation of the 110 K phase, during cooling through the temperature range around 900 °C.

K. Tadanaga | T. Minami | N. Tohge | M. Tatsumisago | S. Tsuboi

[1] T. Minami,et al. Formation of high-Tc superconductors from rapidly quenched BiPbCaSrCuO glasses , 1990 .

[2] T. Minami,et al. Substitution Effects of Pb for Bi on the Formation of High-Tc Superconducting Thick Films in the Bi-Pb-Ca-Sr-Cu-O System by the Melt-Solidification Method , 1989 .

[3] J. Takada,et al. Crystalline Phases Formed in the Partially Melted States of Bi-Sr-Ca-Cu-O , 1989 .

[4] T. Minami,et al. Instantaneous Preparation of Superconducting Thick Films through Melts in the Bi-Ca-Sr-Cu-O System , 1988 .

[5] L. Soderholm,et al. Preparation of Bi-Sr-Ca-Cu-O superconductors from oxide-glass precursors , 1988 .

[6] D. Fork,et al. Superconducting Bi-Ca-Sr-Cu-O Fibers Grown by the Laser-Heated Pedestal Growth Method , 1988, Science.