Subsolidus phase relations in the La2O3–BaO–CuO system were studied at 950°C. Three previously reported binary compounds exist (La2CuO4, BaLa2O4, and BaCuO2) and five previously reported ternary phases occur (La2‐xBaxCuO4‐(x/2)+δ, La4‐2xBa2+2xCu2‐xO10‐2x, La2‐xBa1+xCu2O6‐(x‐2), La3‐xBa3+xCu6O14±δ, and La4BaCu5O13+δ). Of the seven phases in the diagram, all but BaLa2O4, BaCuO2, and La4BaCu5O13+δ were shown to exhibit significant ranges of solubility. The diagram is important in that both >30 K (La2‐xBaxCuO4‐(x/2)+δ) and >90 K (La3‐xBa3+xCu6O14+δ, x=1) superconductors occur.
|Journal||Journal of the American Ceramic Society|
|Publication status||Published - May 1988|
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry