Effect of cerium oxide on preparation of high-density sintered magnesia from crystal magnesite

被引：18
|
作者：
Jin, Endong [1 ]
Yu, Jingkun [1 ,2 ]
Wen, Tianpeng [1 ]
Tian, Chen [1 ]
Liu, Zhaoyang [1 ]
Ma, Beiyue [1 ]
Yuan, Lei [2 ]
机构：
[1] Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China
[2] Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Peoples R China
来源：
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2020年 / 9卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Crystal magnesite; Cerium oxide; Bulk density; Sintered MgO; Solid solution reaction; MGO; FABRICATION;
D O I：
10.1016/j.jmrt.2020.06.045
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Sintered MgO was prepared by using MgO powder with different particle sizes by calcination of by crystal magnesite as the raw material and CeO2 powder as an additive. In addition, the effect of the CeO2 addition on the performance of the sintered MgO was investigated. The results showed that (i) the densification of the sintered MgO with a small amount of CeO2 addition appreciably promoted, (ii) the maximum bulk density reached 3.48 g cm(-3), and (iii) the apparent porosity was 0.35%. In the sintering process, the Ca2+ could approach into CeO2 lattices, forming O-2- vacancy at CeO2 grains, which resulted in promoting the growth of CeO2 grains filling the pores between the MgO grains, and enhanced the densification of sintered MgO. In addition, the solid solution reaction limited the formation of silicate phase in MgO, improving the bonding degree between the MgO grains. (C) 2020 The Authors. Published by Elsevier B.V.
引用
收藏
页码：9824 / 9830
页数：7
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