Abstract
Abstract Experimental studies have been conducted to determine the primary phases and liquidus temperatures in the binary “SnO”–SiO2 and ternary “SnO”–CaO–SiO2 systems in equilibrium with tin metal between 1 148 and 1 673 K, using a high temperature equilibration and quenching technique followed by measurement of phase compositions using electron probe X-ray microanalysis. The melting temperature of cassiterite (SnO2) in equilibrium with tin metal was found to be between 1 398 and 1 403 K. The following primary phase fields were identified in the system: malayaite (CaSiSnO5), pseudo-wollastonite (CaSiO3), tridymite and cristobalite (SiO2), and cassiterite (SnO2). The liquidus of the “SnO”–CaO–SiO2 system is dominated by the tridymite or cristobalite (SiO2), and pseudo-wollastonite (CaSiO3) primary phase fields in the range of compositions studied.
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