The formation and stability of 80 K phase in the BiPbSrCaCuO system
- Ceramics Engineering Research Group, Department of Materials Science and Engineering, McMaster University, Hamilton, Ontario, L8S 4L7 (CANADA)
The formation of Pb-doped 80 K phase from nitrate precursors was studied in the Bi{sub 1.84}Pb{sub 0.34}Sr{sub 1.91}Ca{sub 2.00}Cu{sub 3.04}O{sub 10.05} system. Sr(Pb,Bi)O{sub 3}, Ca{sub 5}Bi{sub 14}O{sub 26}, CuO and CaO were found to be the intermediate compounds reacting to produce 80 K phase between 60 and 820{degree}C. Synthesis was complete at 800{degree}C for 24 h. 110 K phase formed at the expense of 80 K phase at temperatures above 820{degree}C. Partial melting was detected and 80 K and 110 K phases were unstable in the presence of liquid phase. They decomposed to 2201, Cu{sub 2}O, and (Ca, Sr, Cu) complex oxides. The melting and decomposition were accompanied by oxygen loss. {copyright} {ital 1996 Materials Research Society.}
- OSTI ID:
- 383098
- Journal Information:
- Journal of Materials Research, Vol. 11, Issue 8; Other Information: PBD: Aug 1996
- Country of Publication:
- United States
- Language:
- English
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