TY - JOUR
T1 - Effect of Heating Atomosphere on Segregation and Dissolution of the Pb-compound in the Bi-2223 Phase
AU - Kusano, Yoshihiro
AU - Nanba, Tokuro
AU - Takada, Jun
AU - Ikeda, Yasunori
AU - Takano, Mikio
PY - 1994
Y1 - 1994
N2 - Thermal behavior of the Bi-2223 phase in the Bi, Pb-Sr-Ca-Cu-0 system, especially segregation and dissolution reaction of the “3321” phase which was identified as Sr2.5Bi0.5Pb3Ca2CuO2, has been studied by XRD, SQUID and resistivity measurements. On annealing below 830°C in air, the “3321” phase precipitated from the 2223 crystals. When the 2223 phase was annealed at 750°C in O2stream, the precipitation of the “3321” phase increased. On annealing at 750°C in Ar stream, however, no precipitation of the “3321” phase was detected. By reheateing at 850°C even for lmin, the “3321” phase was almost dissolved into the mother 2223 crystals. When the 2223 phase was reheated at 750°C in Ar stream after annealing at 750°C in air, the “3321” phase disappeared. On the contrary, the “3321” phase was stable on reheating at 870°C in O2stream. Therefore, it seems that the “3321” and the 2223 phase coexist in epuilibrium in a high oxygen partial pressure.
AB - Thermal behavior of the Bi-2223 phase in the Bi, Pb-Sr-Ca-Cu-0 system, especially segregation and dissolution reaction of the “3321” phase which was identified as Sr2.5Bi0.5Pb3Ca2CuO2, has been studied by XRD, SQUID and resistivity measurements. On annealing below 830°C in air, the “3321” phase precipitated from the 2223 crystals. When the 2223 phase was annealed at 750°C in O2stream, the precipitation of the “3321” phase increased. On annealing at 750°C in Ar stream, however, no precipitation of the “3321” phase was detected. By reheateing at 850°C even for lmin, the “3321” phase was almost dissolved into the mother 2223 crystals. When the 2223 phase was reheated at 750°C in Ar stream after annealing at 750°C in air, the “3321” phase disappeared. On the contrary, the “3321” phase was stable on reheating at 870°C in O2stream. Therefore, it seems that the “3321” and the 2223 phase coexist in epuilibrium in a high oxygen partial pressure.
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U2 - 10.2497/jjspm.41.388
DO - 10.2497/jjspm.41.388
M3 - Article
AN - SCOPUS:0028421212
VL - 41
SP - 388
EP - 391
JO - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
JF - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
SN - 0532-8799
IS - 4
ER -