Phase relations in the BaTi03-Ti02 system were studied at temperatures above 1300°C in air. Quenching experiments were performed with high-purity reagents, and a new equilibrium phase diagram was constructed. Results include redetermination of the liquidus boundaries, the eutectic temperature, the melting or decomposition temperatures of the stable compounds in the system, the cubic-hexagonal transition in BaTiO,, and the solid solubility of TiOz in BaTi03. [

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