30 kbar phase equilibria of the La{sub 2}O{sub 3}-SrO-CuO system at 950 C
- Univ. of Houston, TX (United States)
Phase equilibria of the La{sub 2}O{sub 3}-SrO-CuO system have been determined at 950 C at 30 kbar (3 GPa). Stable phases at the apexes of the ternary phase diagram are CuO, La{sub 2}O{sub 3}, and SrO. Stable intermediate phases are La{sub 2}CuO{sub 4} and La{sub 2}Cu{sub 2}O{sub 5} in the LaO{sub 1.5}-CuO binary and Sr{sub 2}CuO{sub 3}, SrCuO{sub 2}, and Sr{sub 14}Cu{sub 24}O{sub 41} in the CuO-SrO binary. The La{sub 2{minus}x}Sr{sub x}-CuO{sub 4{minus}{delta}} solid solution is stable for 0.00 {le} x {le} 1.29, the La{sub 2{minus}x}Sr{sub 1+x}Cu{sub 2}O{sub 6+{delta}} solid solution is stable for 0.03 {le} x {le} 0.20, the La{sub 2{minus}x}Sr{sub x}Cu{sub 2}O{sub 5{minus}{delta}} solid solution is stable for 0.00 {le} x {le} 1.08, and the La{sub x}Sr{sub 14{minus}x}Cu{sub 24}O{sub 41} solid solution is stable for 0.00 {le} x {le} 6.15. The 30 kbar phase diagram differs from the 1 atm (0.1 MPa) and 10 kbar (1 GPa) results principally in the absence of La{sub 1{minus}x}Sr{sub 2+x}Cu{sub 2}O{sub 5.5+{delta}} as a stable phase and the extended range of the La{sub 2{minus}x}Sr{sub x}Cu{sub 2}O{sub 5{minus}{delta}} solid solution at 30 kbar.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 455169
- Journal Information:
- Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 1 Vol. 80; ISSN 0002-7820; ISSN JACTAW
- Country of Publication:
- United States
- Language:
- English
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