Effect of CeO2 content on mechanical properties of the glass ceramics prepared from Bayan Obo West Mine tailing

被引：0

作者：

Chen, Hua ^{[1
,3
]}

Li, Baowei ^{[1
,2
]}

Zhao, Ming ^{[2
]}

Zhang, Xuefeng ^{[3
]}

Du, Yongsheng ^{[3
]}

机构：

[1] School of Materials Science & Engineering, Inner Mongolia University of Technology, Hohhot

[2] Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Inner Mongolia University of Science & Technology, Baotou, 014010, Inner Mongolia

[3] School of Mathematics, Physics and Biological Engineering, Inner Mongolia University of Science & Technology, Baotou

来源：

Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2015年 / 43卷 / 07期

关键词：

Augite; Bayan Obo West Mine tailing; Cerium oxide; Glass ceramics;

D O I：

10.14062/j.issn.0454-5648.2015.07.25

中图分类号：

学科分类号：

摘要：

The CaO-MgO-Al2O3-SiO2 (CAMS) glass ceramics were fabricated with a fly ash and a tailing from Bayan Obo West Mine, China, by a conventional melting method. The effects of CeO2 content and crystallization temperature on the optimization of crystallization, microstructure, bending strength and the Vickers hardness of the CAMS glass ceramics were investigated. The results show that Ce4+ ions can partially substitute Ca2+ ions in augite, and the primary crystalline phase can be formed in the samples. The addition of 0.6% (in mass fraction) CeO2 content to the glass ceramic decreases the crystallization temperature of augite and increases its crystallinity. The dendrite structure of augite crystals becomes more interlocked. This morphology change is mainly due to the increases of the bending strength and the Vickers hardness of the sample. When CeO2 content further increases, the segregation Ce4+ ions and the later formation of Ca2Ce8(SiO4)6O2 second phase in the residual glass between augite dendrites can hinder the growth of augite. The glass ceramic sample with 0.6% CeO2 content that is crystallized at 870 ℃ for 2 h has the optimum mechanical properties (i.e., the bending strength and the Vickers hardness are 234 MPa and 6.982 GPa, respectively). ©, 2015, Chinese Ceramic Society. All right reserved.

引用

页码：1002 / 1007

页数：5

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