Experimental study of phase equilibria in the MgO-SiO2-TiOx system

Experimental study of phase equilibria in the MgO-SiO2-TiOx system
复制标题

MgO-SiO2-TiOx体系相平衡实验研究

DOI:
10.1016/j.jallcom.2016.12.009
复制
发表时间:
2017-02
影响因子:
6.2
通讯作者:
Zhanbing Yang
Zhanbing Yang
中科院分区:
材料科学2区
文献类型:
--
作者:
Baijun Yan;Xu Wang;Zhanbing Yang

文献摘要

参考文献

被引文献

相似文献

采用高温平衡淬火、电子探针(EPMA)和X射线衍射法研究了1873℃下MgO-SiO_2-TiOx体系的相平衡。根据实验结果,绘制了氧分压为4.85T×10~(-10)−~(-11)atm的氧化镁-二氧化硅-钛氧化物体系的等温相图。通过与MgO-SiO_2-TiO_2相图的比较,得到了氧分压对相关系的影响。首先,用斜方辉石(Ti3-xMgxO5)代替TiO2和MgTi2O5实现与液相的平衡。其次,在还原条件下,化合物MgTiO_3不存在。第三,由于氧分压较低,单液相区缩小。此外,在另外两种氧分压分别为1.94T×10-−9和2.75T×10-−13atm的条件下,研究了液体与斜长石之间的平衡。二氧化钛在液相中的饱和溶解度随氧分压的降低而降低,二氧化硅含量越高,钛氧化物在液相中的活度系数越大。
Phase equilibria in the MgO-SiO2-TiOxsystem at 1873 K were investigated under controlled atmosphere by employing the method of high-temperature equilibration followed by quenching, electron probe microanalysis (EPMA) and XRD analysis. Based on the experimental results, isothermal phase diagram of the MgO-SiO2-TiOxsystem under oxygen partial pressure of 4.85 × 10−11atm was constructed. By comparing with the phase diagram of MgO-SiO2-TiO2, the effect of oxygen partial pressure on the phase relations was obtained. Firstly, anosovite (Ti3-xMgxO5) replaces TiO2and MgTi2O5to equilibrate with liquid phase. Secondly, the compound MgTiO3no longer exists under the reducing condition. Thirdly, the single liquid region shrinks due to the lower oxygen partial pressure. Furthermore, the equilibria between liquid and anosovite were investigated under other two oxygen partial pressures of 1.94 × 10−9and 2.75 × 10−13atm, respectively. The saturated solubility of titanium oxide in the liquid phase decreases with the decreasing of the oxygen partial pressure and higher SiO2content increases the activity coefficient of TiOxin liquid phase.
DOI: 10.2355/isijinternational.45.1543
发表时间: 2005-11
期刊: Isij International
影响因子: 1.8
作者:
Youn‐Bae Kang;Hae-geon Lee
通讯作者: Youn‐Bae Kang;Hae-geon Lee
DOI: 10.1007/s11663-002-0086-2
发表时间: 2002-02
期刊: Metallurgical and Materials Transactions B
影响因子: --
作者:
G. Tranell;O. Ostrovski;S. Jahanshahi
通讯作者: G. Tranell;O. Ostrovski;S. Jahanshahi
DOI: 10.1016/0364-5916(93)90019-8
发表时间: 1993-04
影响因子: 2.4
作者:
G. Eriksson;Ping Wu;A. Pelton
通讯作者: G. Eriksson;Ping Wu;A. Pelton
DOI: 10.1002/crat.200800213
发表时间: 2009-01
影响因子: 1.5
作者:
Vladislav Grass;P. Istomin;L. Nazarova
通讯作者: Vladislav Grass;P. Istomin;L. Nazarova
DOI: 10.2355/isijinternational.36.suppl_s26
发表时间: 1996-12
期刊: Isij International
影响因子: 1.8
作者:
Hiroshige Amitani;Kazuki Morita;N. Sano
通讯作者: Hiroshige Amitani;Kazuki Morita;N. Sano