Liquidus and phase equilibria in CaO-SiO2-5%MgO-20%Al2O3-TiO2 system  

作　　者：孙丽枫 石俊杰 张波 邱吉雨 王昭云 姜茂发 

机构地区：[1]School of Metallurgy,Northeastern University,Shenyang 110819,China [2]Key Laboratory for Ecological Metallurgy of Multimetallic Ores of Ministry of Education(Northeastern University),Shenyang 110819,China

出　　处：《Journal of Central South University》2017年第1期48-55,共8页中南大学学报（英文版）

基　　金：Projects(51104039,51374059,51304042)supported by the National Natural Science Foundation of China;Project(L2013114)supported by Scientific Research Fund of Liaoning Provincial Education Department,China;Project(2012221013)supported by Programs of Liaoning Province for Science and Technology Development,China;Project(N130602002)supported by the Fundamental Research Funds for the Central Universities China

摘　　要：The single hot thermocouple technique （SHTT） and high temperature equilibrium technique were combined to investigate the phase diagram of the CaO-SiO2-5%MgO-20%AlzO3-TiO2 system. The 1300 ℃ to 1500 ℃ liquidus lines are calculated according to the thermodynamic equations based on the pseudo-melting temperatures measured by the single hot thermocouple technique. The phase equilibria relationships are experimentally determined at 1400 ℃ using the high temperature equilibria technique followed by X-ray fluorescence （XRF）, X-ray diffraction（XRD）, scanning electron microscopy （SEM） and energy dispersive X-ray spectroscopy （EDX） analysis. The liquid phase（L）, melilite solid solution phase （（C2MSz,C2AS）ss）, diopside phase（CMS2） and perovskite phase （CaO·TiO2） are found. Coupled with the liquidus lines and equilibria results, the phase diagram is constructed for the specified region of the CaO-SiO2-5%MgO-20%Al2O3-TiO2 system.The single hot thermocouple technique(SHTT) and high temperature equilibrium technique were combined to investigate the phase diagram of the CaO-SiO_2-5%MgO-20%Al_2O_3-TiO_2 system.The 1300 ℃ to 1500 ℃ liquidus lines are calculated according to the thermodynamic equations based on the pseudo-melting temperatures measured by the single hot thermocouple technique.The phase equilibria relationships are experimentally determined at 1400 ℃ using the high temperature equilibria technique followed by X-ray fluorescence(XRF),X-ray diffraction(XRD),scanning electron microscopy(SEM) and energy dispersive X-ray spectroscopy(EDX) analysis.The liquid phase(L),melilite solid solution phase((C_2MS_2,C_2AS)_(ss)),diopside phase(CMS_2) and perovskite phase(CaOTiO_2) are found.Coupled with the liquidus lines and equilibria results,the phase diagram is constructed for the specified region of the CaO-SiO_2-5%MgO-20%Al_2O_3-TiO_2 system.

关 键 词：phase diagram LIQUIDUS EQUILIBRIUM TiO2 single hot thermocouple technique （SHTT） THERMODYNAMICS 

分 类 号：TF534[冶金工程—钢铁冶金]