Thermodynamic assessment of the Nd2O3-CaO-SiO2 ternary system

被引：13

作者：

Le, Thu Hoai ^{[1
]}

Tang, Kai ^{[2
]}

Arnout, Sander ^{[3
]}

Malfliet, Annelies ^{[1
]}

Blanpain, Bart ^{[1
]}

Guo, Muxing ^{[1
]}

机构：

[1] Katholieke Univ Leuven, Dept Mat Engn, Kasteelpk Arenberg 44 Bus 2450, B-3001 Heverlee, Leuven, Belgium

[2] SINTEF Mat & Chem, N-7465 Trondheim, Norway

[3] InsPyro NV, Kapeldreef 60, B-3001 Leuven, Belgium

来源：

CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY | 2016年 / 55卷

关键词：

Nd2O3-CaO-SiO2; system; Phase relations; Thermodynamic modeling; Rare earth elements; QUASI-CHEMICAL MODEL; RARE-EARTH-OXIDES; PHASE-RELATIONS; CRYSTALLIZATION; TEMPERATURE; GLASSES; AL2O3;

D O I：

10.1016/j.calphad.2016.08.006

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In order to enable efficient recycling of rare earth metals through high temperature processes, the phase relations in rare earth oxide containing slags need to be understood. A thermodynamic description of the CaO-SiO2-Nd2O3 ternary system and its Nd-containing binary subsystems was, therefore, constructed in this study, based on existing phase diagram and thermodynamic data. The Gibbs energy of the liquid oxides in the CaO-SiO2-Nd2O3 system was modeled using the Modified Quasichemical Model, The solid phases Ca2-2xNd2xSiO4Ox, Ca3-3xNd2xSiO5, and Ca2+10xNd8-8x(SiO4)(6)O2-2x were modeled with polynomial expansions of the excess Gibbs energy. The optimized phase diagram of the CaO-SiO2-Nd2O3 system is in good agreement with the experimental data. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：157 / 164

页数：8

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