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首页> 外文期刊>ISIJ international >Experimental study of phase equilibria in the MnO-SiO_2-'TiO_2'-'Ti_2O_3' system
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Experimental study of phase equilibria in the MnO-SiO_2-'TiO_2'-'Ti_2O_3' system

机译:MnO-SiO_2-“ TiO_2”-“ Ti_2O_3”体系中相平衡的实验研究

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摘要

Phase equilibria and liquidus surface in the system MnO-SiO_2-"TiO_2"-"Ti_2O_3" under controlled atmosphere have been investigated in the temperature range from 1 200 to 1 500 deg C and in the range of log pO_2 from -7.6 (pCO/pCO_2=1) to -16.6 (C-CO equilibration). High-temperature equilibration, quenching and electron probe microanalysis (EPMA) were employed to obtain equilibrium compositions of liquid and several solid solutions. The following primary phases have been observed; molten oxide, manganosite (MnO), rutile (TiO_(2-delta)), tridymite and cristobalite (SiO_2), tephroite (Mn_2SiO_4), rhodonite (MnSiO_3), spinel (Mn_2TiO_4-MnTi_2O_4), pyrophanite (MnTiO_3-Ti_2O_3) and pseudobrookite ("MnTi_2O_5"-Ti_3O_5) solid solutions. By decreasing oxygen partial pressure, homogeneous liquid oxide area becomes smaller. No ternary compounds or ternary solid solutions were observed.
机译:在1200至1500摄氏度的温度范围和log pO_2的范围为-7.6(pCO //)下研究了在受控气氛下MnO-SiO_2-“ TiO_2”-“ Ti_2O_3”体系中的相平衡和液相线表面。 pCO_2 = 1)到-16.6(C-CO平衡)。高温平衡,淬灭和电子探针微分析(EPMA)用于获得液体和几种固溶体的平衡组成。观察到以下主要阶段;熔融氧化物,锰铁矿(MnO),金红石(TiO_(2-δ)),鳞石英和方石英石(SiO_2),球铁矿(Mn_2SiO_4),菱锰矿(MnSiO_3),尖晶石(Mn_2TiO_4-MnTi_2O_4),焦石(MnTiO_3-Ti_2O_3)和假锰矿(“ MnTi_2O_5” -Ti_3O_5)固溶体。通过降低氧分压,均匀的液态氧化物面积变小。没有观察到三元化合物或三元固溶体。

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