A partial pseudoternary phase diagram of the LaO 1.5 -BaO-ScO 1.5 system was established at 1600°C. According to the phase diagram, the solubility of barium into the cubic perovskite phase (LaScO 3 ) at 1600°C is 0.24 in a mole fraction of barium oxide (X BaO ) on the composition line where the mole fraction of scandium oxide is 0.50. Another cubic perovskite phase (BaZrO 3 ) in the BaO-ZrO 2 -ScO 1.5 system is also known. We investigated the phase relationships between the two cubic perovskites in the pseudoquaternary phase diagram of the LaO 1.5 -BaO-ScO 1.5 -ZrO 2 system. As a result, we found the existence of a wide solid solution region between the cubic perovskites at 1600°C. The region was determined by X-ray diffraction (XRD) analysis and energy dispersive X-ray (EDX) microanalysis of samples with various compositions, and established the partial pseudoquaternary phase diagram.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Inorganic Chemistry
- Materials Chemistry