10 kbar phase equilibria in the Y-Ba-Cu oxide system at 950 C
Journal Article
·
· Journal of the American Ceramic Society
- Univ. of Houston, TX (United States)
Phase equilibria in the YO{sub 1.5}BaO-CuO system have been determined at 950 C at 10 kbar using a piston-cylinder apparatus. The oxide phases stable under these conditions are Y{sub 2}O{sub 3}, Y{sub 2}Cu{sub 2}O{sub 5}, CuO, Y{sub 2}BaCuO{sub 5}, YBa{sub 2}Cu{sub 3}O{sub 6.5}, BaCuO{sub 2}, Y{sub 2}BaO{sub 4}, Y{sub 2}Ba{sub 3}O{sub 6}, and YBa{sub 4}Cu{sub 2}O{sub 7.5}. The phase stabilities observed at 950 C at 10 kbar are identical to those observed at 950 C in air or oxygen at 1 atm for compositions with < 40% Ba of the cations. In more Ba-rich portions of the phase diagram, carbonates and oxycarbonates are stabilized and a systematic determination of the phase equilibria has not been successful.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 211720
- Journal Information:
- Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 2 Vol. 79; ISSN 0002-7820; ISSN JACTAW
- Country of Publication:
- United States
- Language:
- English
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