Phase equilibria of CaO-SiO2-Gd2O3 system and the feasibility of rare-earth recovery

Phase equilibria of CaO-SiO2-Gd2O3 system and the feasibility of rare-earth recovery
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CaO-SiO2-Gd2O3体系的相平衡及稀土回收的可行性

DOI:
10.1016/j.ceramint.2018.06.006
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发表时间:
2018-09
影响因子:
5.2
通讯作者:
Qu Tao
Qu Tao
中科院分区:
材料科学1区
文献类型:
--
作者:
Zhi Wenke;Wang Fei;Yang Hongwei;Yang Bin;Tian Yang;Deng Yong;Qu Tao

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通过电子探针微量分析 (EPMA) 表征平衡样品,研究了 CaO-Gd2O3-SiO2 渣体系在 1773K 和 1873K 时的相平衡。 CaO-Gd2O3-SiO2三元体系在1773K、氩气气氛下形成4个三相平衡态和5个两相平衡态。 1873K时体系中出现了3个三相平衡点、6个两相平衡点和1个液相,随后根据实验结果构建了相图的等温段。还根据相关系讨论了稀土回收的可行性。
Phase equilibria of the CaO-Gd2O3-SiO2slag system at 1773 K and 1873 K were investigated by characterizing equilibrated samples with electron probe microanalysis (EPMA). Four three-phase equilibria and five two-phase equilibria are formed in the CaO-Gd2O3-SiO2ternary system at 1773 K in argon atmosphere. While three three-phase equilibria, six two-phase equilibria and one liquid phase are presented in the system at 1873 K. The isothermal section of the phase diagram is thereafter constructed based on the experimental results. The feasibility of the rare earth recovery is also discussed based on the phase relations.
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