Effects of Sintering Aids and Thickness on Densification and Properties of Magnesia-Aluminum Spinel Transparent Ceramics in the Aluminum Electrolysis Cells

IF 2.2 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

Journal of Electronic Materials Pub Date : 2024-08-28 DOI:10.1007/s11664-024-11055-3

Siya Zeng, Yuan Xiang, Jianhua Liu, Jie Li, Junwen Zhou

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Abstract

The electrolytic cell is the main equipment for electrolytic aluminum production. The visual electrolytic cell can observe and study the production process and mechanism of aluminum electrolysis. The effects of Y₂O₃ addition and sample thickness on the densification behavior and transmittance of Magnesium-aluminate spinel (MAS) were studied. The relative density, porosity, phase composition, microstructure, Vickers hardness, and transmittance of the sintered samples were characterized using the Archimedes method, x-ray diffraction analysis, scanning electron microscopy, Vickers hardness tester, and UV-visible near-infrared diffuse reflection. The results show that the appropriate amount of Y₂O₃ can enhance the transmittance of MgAl₂O₄ and the optimum Y₂O₃ content is 2 wt.%. At this time, the relative density of Magnesium-aluminate spinel (MAS), the maximum hardness, and the maximum transmittance are 96.19%, 18.18 GPa, and 36.3%, respectively. Under the optimum conditions, when the mass of the sample is 0.2 g, the relative density and maximum hardness of the Magnesium-aluminate spinel (MAS) sample are 97.28% and 18.18 GPa, respectively. Although the transmittance is not the highest, it is only lower than the transmittance of 0.15 g sample. The optimum sintering additive content and sample thickness jointly promote the densification, hardness, and transmittance of Magnesium-aluminate spinel (MAS).

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烧结助剂和厚度对铝电解槽中镁铝尖晶石透明陶瓷的致密化和性能的影响

电解槽是电解铝生产的主要设备。可视电解槽可以观察和研究铝电解的生产过程和机理。研究了 Y2O3 添加量和样品厚度对镁铝尖晶石（MAS）致密化行为和透射率的影响。采用阿基米德法、X 射线衍射分析、扫描电子显微镜、维氏硬度计和紫外-可见近红外漫反射对烧结样品的相对密度、孔隙率、相组成、微观结构、维氏硬度和透射率进行了表征。结果表明，适量的 Y2O3 可以提高 MgAl2O4 的透射率，最佳的 Y2O3 含量为 2 wt.%。此时，尖晶石镁铝酸盐（MAS）的相对密度、最大硬度和最大透射率分别为 96.19%、18.18 GPa 和 36.3%。在最佳条件下，当样品质量为 0.2 克时，镁铝尖晶石（MAS）样品的相对密度和最大硬度分别为 97.28% 和 18.18 GPa。虽然透射率不是最高的，但也仅低于 0.15 g 样品的透射率。最佳烧结添加剂含量和样品厚度共同促进了镁铝尖晶石（MAS）的致密化、硬度和透射率。

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来源期刊

Journal of Electronic Materials 工程技术-材料科学：综合

CiteScore

4.10

自引率

4.80%

发文量

693

审稿时长

3.8 months

期刊介绍： The Journal of Electronic Materials (JEM) reports monthly on the science and technology of electronic materials, while examining new applications for semiconductors, magnetic alloys, dielectrics, nanoscale materials, and photonic materials. The journal welcomes articles on methods for preparing and evaluating the chemical, physical, electronic, and optical properties of these materials. Specific areas of interest are materials for state-of-the-art transistors, nanotechnology, electronic packaging, detectors, emitters, metallization, superconductivity, and energy applications. Review papers on current topics enable individuals in the field of electronics to keep abreast of activities in areas peripheral to their own. JEM also selects papers from conferences such as the Electronic Materials Conference, the U.S. Workshop on the Physics and Chemistry of II-VI Materials, and the International Conference on Thermoelectrics. It benefits both specialists and non-specialists in the electronic materials field. A journal of The Minerals, Metals & Materials Society.