Effect of Y2O3 doping on a gehlenite/magnesia-alumina spinel obtained by sintering secondary aluminium ash

IF 1.9 4区材料科学 Q3 Materials Science

Journal of the Australian Ceramic Society Pub Date : 2022-04-27 DOI:10.1007/s41779-022-00740-3

Yong Zhang, Tiantian Duan, Xiaojuan He, Yuncai He, Yuting Wang

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Abstract

Due to the rapid development of China’s regeneration industry, secondary aluminium ash (SAA) has been extensively produced. The reuse of SAA and Y₂O₃ doping was studied in this research. This proved that SAA can turn into a raw material for gehlenite/magnesia-alumina spinels. Furthermore, doping with Y₂O₃ can aggrandize the densification feature of gehlenite/magnesia-alumina spinels. The densification of the gehlenite/magnesia-alumina spinel without Y₂O₃ was lower than that of the doped spinel in the temperature range of 1573 to 1773 K. At 1673 K, 3 wt% Y₂O₃ was added to the gehlenite/magnesia-alumina spinel. It had a density of 2.05 g·cm⁻³ and a compressive strength of 91.2 MPa. Generally, 3 wt% Y₂O₃ was added, and the sintering temperature at 1673 K was appropriate. The elevation of the densification feature was also attributable to the solubility of Y₂O₃ and the formation of a low-viscosity liquid phase such as YCaAl₃O₇. The SAA can be reused for the recovery of gehlenite/magnesia-alumina spinels. Doping it with Y₂O₃ can broaden its reutilization in new water-resistant ceramic materials.

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Y2O3掺杂对二次铝灰烧结制备辉长石/镁铝尖晶石的影响

随着中国再生工业的迅速发展，二次铝灰(SAA)已被大量生产。本研究对SAA和Y2O3掺杂的再利用进行了研究。这证明了SAA可以成为辉长石/镁铝尖晶石的原料。此外，Y2O3的掺入可以增强辉长石/镁铝尖晶石的致密化特征。在1573 ~ 1773 K温度范围内，未添加Y2O3的辉长石/镁铝尖晶石的致密性低于掺杂的尖晶石。在1673 K时，在辉长石/镁铝尖晶石中加入3wt %的Y2O3。其密度为2.05 g·cm−3，抗压强度为91.2 MPa。一般情况下，Y2O3添加量为3wt %，烧结温度为1673 K较为适宜。致密化特征的提高还归因于Y2O3的溶解度和低粘度液相的形成，如YCaAl3O7。SAA可用于回收辉长石/镁铝尖晶石。添加Y2O3可拓宽其在新型防水陶瓷材料中的重复利用。

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来源期刊

Journal of the Australian Ceramic Society MATERIALS SCIENCE, CERAMICS-

CiteScore

3.20

自引率

5.30%

发文量

审稿时长

>12 weeks

期刊介绍： Publishes high quality research and technical papers in all areas of ceramic and related materials Spans the broad and growing fields of ceramic technology, material science and bioceramics Chronicles new advances in ceramic materials, manufacturing processes and applications Journal of the Australian Ceramic Society since 1965 Professional language editing service is available through our affiliates Nature Research Editing Service and American Journal Experts at the author''s cost and does not guarantee that the manuscript will be reviewed or accepted