Experimental Study and Thermodynamic Calculation of BaO-Lu2O3 Binary System
Experimental Study and Thermodynamic Calculation of BaO-Lu2O3 Binary System
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DOI：
10.4028/www.scientific.net/msf.852.443
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发表时间：
2016-04
期刊：
影响因子：
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通讯作者：
Xin Ye;Qin Li;Yang Luo;Di Wu
中科院分区：
文献类型：
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作者：
Xin Ye;Qin Li;Yang Luo;Di Wu
在BaO-Lu 2 O3二元系中，在1373、1573和1773 K温度下只有一个中间化合物Ba 3Lu 4 O 9，根据已有的实验相图和相关热力学数据，采用CALPHAD方法对BaO-Lu 2 O3二元系进行了优化计算。高温溶液的吉布斯自由能用离子双亚晶格模型描述为（Ba ~（2+），Lu ~（3+））P（O ~（2-））Q。计算得到的相图、中间相Ba_3Lu_4O_9的吉布斯自由能和混合吉布斯自由能与实验结果在误差范围内符合得很好。该研究为BaO-Lu 2 O3-SiO2荧光粉基质体系的进一步研究提供了理论基础，也为相关冶金炉渣、耐火材料、高温超导材料体系的相图和热力学研究提供了新的思路。
Only one intermediate compound Ba3Lu4O9was identified at 1373, 1573 and 1773K in the BaO-Lu2O3system in present work.Based on the available experimental phase diagram and relevant thermodynamic data, BaO-Lu2O3 binary system was optimized and calculated by using CALPHAD method. The Gibbs free energy of high temperature solution was described by an ionic two-sublattice model as (Ba2+,Lu3+)P(O2-)Q. The calculated phase diagram, Gibbs energy of intermediate phase Ba3Lu4O9and Gibbs energy of mixingagreewell with experimental resultswithin error limits. The study will offer theoretical basis for further research of the phosphor matrix system of BaO-Lu2O3-SiO2, but also provide new idea for the phase diagram and thermodynamic research on related metallurgical slags, refractories, high-temperature superconductivity material systems.