Effect of CeO2 addition on the sintering behavior of pre-synthesized magnesium aluminate spinel ceramic powders

Effect of CeO2 addition on the sintering behavior of pre-synthesized magnesium aluminate spinel ceramic powders
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CeO2添加量对预合成铝酸镁尖晶石陶瓷粉末烧结行为的影响

DOI:
10.1016/j.ceramint.2018.09.194
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发表时间:
2019-01
影响因子:
5.2
通讯作者:
Yan Ma
Yan Ma
中科院分区:
材料科学1区
文献类型:
--
作者:
Zhenghuang Quan;Zhoufu Wang;Xitang Wang;Hao Liu;Yan Ma

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本文研究了1 wt%、2 wt%和3 wt%的ceo_2作为添加剂对富铝尖晶石和富镁尖晶石粉末在1600 °C、1650 °C、1700 °C和1750 °C烧结行为的影响。根据膨胀测量、线收缩率、体积密度、相分析和微观结构研究了陶瓷的烧结行为。结果表明,ceo_2与从尖晶石中析出的al2o3发生反应,在尖晶石晶粒之间形成片状的ceal11o18颗粒,从而阻碍了富铝尖晶石的烧结过程。同时,ceo2的存在促进了富镁尖晶石的烧结过程,以孤立的形式分布在尖晶石晶粒中。
In this work, the effects of 1 wt%, 2 wt%, and 3 wt% CeO2as an additive on the sintering behavior of alumina-rich spinel and magnesia-rich spinel powders subjected to sintering at temperatures of 1600 °C, 1650 °C, 1700 °C, and 1750 °C were investigated. The sintering behavior of the ceramics was investigated according to dilatometry measurements, linear shrinkage, bulk density, phase analysis, and microstructure. It was demonstrated that CeO2hindered the sintering process in alumina-rich spinel by reacting with Al2O3exsolved from the spinel to form platelet-shaped particles of CeAl11O18interspersed between the spinel grains. Meanwhile, the presence of CeO2promotes the sintering process in magnesia-rich spinel by being distributed in an isolated form among the spinel grains.
DOI: --
发表时间: 1999-12
期刊: Taikabutsu overseas
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