Phase stability limit of RuSr2GdCu2O8 at various partial oxygen pressures

摘要

The thermal stability limit of the RuSr2GdCu2O8 phase has been determined at oxygen partial pressures of 0.35 and 0.85 bar by thermogravimetry combined with powder X-ray analysis. Decomposition of the phase was observed at 1040 degreesC in 0.35 bar of oxygen, and at 1060degreesC in 0.85 bar of oxygen. The decomposition starts as solid phase process leading to cation redistributions in the parent phase. The peritectic decomposition occurs above 1085degreesC in 35% of O-2 and above 1110degreesC in 85% of O-2. (C) 2003 Elsevier B.V. All rights reserved. [References: 28]