Effect of high-temperature, high-oxygen-fugacity annealing on the stability of the (Bi,Pb){sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10{+-}{delta}}-type compound
Journal Article
·
· Journal of the American Ceramic Society
- Ohio State Univ., Columbus, OH (United States). Dept. of Materials Science and Engineering
The stability of the (Bi,Pb){sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10{+-}{delta}}-type compound has been evaluated under conditions of elevated temperature (500--860 C) and elevated oxygen fugacity (i.e., in O{sub 2}/Ar gas mixtures containing {le}20% O{sub 2} at total pressures of {le}207 MPa). At sufficient high oxygen fugacities and temperatures, the (Bi,Pb){sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10{+-}{delta}}-type compound transformed into a mixture of a strontium-rich (Bi, Pb){sub 1}(Sr,Ca,Cu){sub 2}O{sub y}-type compound, a calcium-rich (Bi,Pb){sub 1}-(Sr,Ca,Cu){sub 2}O{sub y}-type compound, CuO, and a small amount of (Sr,Ca)O. The decomposition of the (Bi,Pb){sub 2}Sr{sub 2}Ca-Cu{sub 3}O{sub 10{+-}{delta}}-type compound was accompanied by a 2%--3% weight gain, which was consistent with an oxidation reaction. The conditions of oxygen fugacity and temperature leading to decomposition, and the resulting decomposition products, are compared for the (Bi,Pb){sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10{+-}{delta}}-type and Bi{sub 2}Sr{sub 2}Ca{sub 1}Cu{sub 2}O{sub 8{+-}{Psi}}-type compounds.
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FG02-90ER45427
- OSTI ID:
- 116102
- Journal Information:
- Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 9 Vol. 78; ISSN 0002-7820; ISSN JACTAW
- Country of Publication:
- United States
- Language:
- English
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