Phase equilibrium relations in the systems Lime-Titania and Zirconia-Titania

Abstract

The systems CaO-Ti02 and Zr0 2-Ti 02 were studied by means of solid-sta te reactions and by the observation of fu sion characteristics. The existence of t wo bin a r y co mpound s in the CaO-Ti02 system was con firmed . One co mpound was fo und to exist in the Zr02-1 i02 system. This co mpound , Zr02 Ti 02, has been found to ha ve orthor hombi c sy mm etry wi th t he following pa ra meters at roo m te mperature : a = 4.806 A, b= 5.032 A, c= 5.447 A. Solidsolu tion development was obse rved in t he Zr02-Ti 02 system , bu t not in t he CaO-Ti 0 2 system. Fro m t he d ata o btained , an equilibr ium di agram is suggested fo r each system.