Equilibrium oxygen potential for the decomposition of YBa2Cu4O8
- 30 July 1990
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 57 (5) , 511-513
- https://doi.org/10.1063/1.103635
Abstract
On lowering the chemical potential of diatomic oxygen, the compound YBa2Cu4O8 was found to decompose into a mixture of YBa2Cu3O6+x and CuO. The equilibrium oxygen potential corresponding to this decomposition has been measured from 870 to 1150 K using a solid‐state cell incorporating yttria‐stabilized zirconia as the solid electrolyte and pure oxygen at a pressure of 1.01×105 Pa as the reference electrode: Pt, O’2‖YBa2Cu4O8+YBa2Cu3O6+x+CuO∥(Y2O3) ZrO2∥O2(1.01×105 Pa), Pt. The low oxygen potential boundary for the stability of YBa2Cu4O8 can be represented by ΔμO2=−238 900+207.7 T(±800) J mol−1. At the standard pressure of oxygen (1.01×105 Pa) the decomposition occurs at 1150 K.Keywords
This publication has 9 references indexed in Scilit:
- Synthesis of 80 K superconducting YBa2Cu4O8 via a novel routePhysica C: Superconductivity and its Applications, 1990
- Stability of 124, 123, and 247 superconductorsPhysica C: Superconductivity and its Applications, 1989
- Eight new high-temperature superconductors with the 1:2:4 structurePhysical Review B, 1989
- Synthesis of bulk superconducting YBa2Cu4O8 at one atmosphere oxygen pressureNature, 1989
- Bulk synthesis of the 81-K superconductor YBa2Cu4O8 at high oxygen pressureNature, 1988
- Superconducting properties of a 27-Åphase of Ba-Y-Cu-OPhysical Review B, 1988
- Crystal structure of the 80 K superconductor YBa2Cu4O8Nature, 1988
- Observation of a halide (F/Cl) stabilized, new perovskite phase in superconducting Y2Ba5Cu7Ox filmsApplied Physics Letters, 1988
- Superconductivity at 93 K in a new mixed-phase Y-Ba-Cu-O compound system at ambient pressurePhysical Review Letters, 1987