Subsolidus phase relations in the ZnO–MoO 3–B 2O 3, ZnO–MoO 3–WO 3 and ZnO–WO 3–B 2O 3 ternary systems

Abstract

The subsolidus phase relations in the ZnO–MoO 3–B 2O 3, ZnO–MoO 3–WO 3 and ZnO–WO 3–B 2O 3 ternary systems have been investigated by the means of X-ray powder diffraction (XRD). There is no ternary compound in all the systems. There are five binary compounds and five tie lines in the ZnO–MoO 3–B 2O 3 system. This system can be divided into six 3-phase regions. There are three binary compounds and three tie lines in the ZnO–MoO 3–WO 3 system. This system can be divided into four 3-phase regions. There are four binary compounds and four tie lines in the ZnO–WO 3–B 2O 3 system. This system can be divided into five 3-phase regions. The possible component regions for ZnO single crystal flux growth were discussed. The phase diagram of Zn 3B 2O 6–ZnWO 4 pseudo-binary system has been constructed, and the result reveals this system is eutectic system. The eutectic temperature is 1007 °C and eutectic point component is 70 mol% Zn 3B 2O 6.