Subsolidus Phase Relations of the CaO-WO3-CuO System at 800 °C in Air

Abstract

The subsolidus phase relations of the CaO-WO 3 -CuO system were investigated in air. The samples were equilibrated at 800°C. Under these conditions, five binary oxide phases are stable: Ca 2 CuO 3 , Cu 3 WO 6 , CuWO 4 , CaWO 4 and Ca 3 WO 6 . The pseudo-ternary section is characterised by 6 three-phase regions. No Ca equivalents to the Sr 2 CuWO 6 , Ba 2 CuWO 6 or Sr 8 CuW 3 O 18 phases were formed.