Formation of (Bi,Pb)-2223 phase during solidifying and sintering
- Akita Univ. (Japan); and others
High-temperature microstructures and the formation of (Bi,Pb)-2223 phase were examined in Bi{sub 1.84}Pb{sub 0.34}Sr{sub 1.91}Ca{sub 2.03}Cu{sub 3.06}O{sub x} during solidifying and sintering by high temperature optical microscope, XRD, SEM, EDS and AC susceptibility measurement. During solidification, firstly, the needle-like phase (Sr{sub x}Ca{sub 1{minus}x}){sub 2}CuO{sub 3} began to crystallize at about 930{degrees}C, secondly, the (Sr{sub x}Ca{sub 1{minus}x}) CuO{sub 2} with rectangular shape began to crystallize around 890 {degrees}C, and finally the plate-like 2212 phase began to form by the peritectic reaction of the two (Sr,Ca)-Cu-O compounds and liquid phase below 870{degrees}C. The 2223 phase and Sr{sub 6}Pb{sub 2}O{sub 9} were transformed slowly by the solid state reaction of the 2212 phase and residual (Sr,Ca)-Cu-O compounds in a long time sitering (> 18 h) at 840{degrees} C after solidification.
- OSTI ID:
- 482079
- Report Number(s):
- CONF-950722-; ISSN 0065-2482; TRN: 97:001732-0030
- Journal Information:
- Advances in Cryogenic Engineering, Vol. 42B; Conference: CEC/ICMC `95: cryogenic engineering conference and international cryogenic materials conference, Columbus, OH (United States), 17-21 Jul 1995; Other Information: PBD: 1997
- Country of Publication:
- United States
- Language:
- English
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