Phase relations in the BaOTiO2−δ system under highly reducing conditions

The phase relations in the BaO–TiO2−δ system within the concentration range of 14–65 mol% BaO under reducing conditions were investigated using high temperature DTA and X-ray powder diffraction. The stable compounds under these conditions were determined, together with the temperatures of the invariant reactions and the liquidus boundaries. The phase relations in this BaO–TiO2–Ti2O3 system under elevated temperatures and reducing atmospheres are represented in the form of quasi-binary phase diagrams.