纳米氧化锆对氧化镁陶瓷抗热震性的影响

doi:10.11896/cldb.17090144

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Abstract The magnesia ceramic specimens were prepared by high purity magnesia powder and nano-monoclinic zirconia powder as raw material. The specimens were sintered at 1 350 ℃, 1 450 ℃ and 1 550 ℃ for holding 2 hours, respectively. The effects of adding quantity of nano-monoclinic zirconia and sintering temperature on the sintering property and thermal shock resistance of magnesia ceramic were investigated. The results show that the densification and the microstructure homogeneity are improved, sintering temperature is decreased by adding monoclinic zirconia into magnesia ceramic. The thermal shock resistance of specimens with nano-monoclinic zirconia is improved due to mechanisms of microcrack toughening, phase transformation toughening and crack deflection toughening. The optimal scheme to improve thermal shock resistance of magnesia ceramic is adding 12wt% monoclinic zirconia and sintering at 1 450 ℃.

Key words： zirconia magnesia ceramic phase transformation microstructure thermal shock resistance

Published: 16 May 2019

CLC number:

TQ174

Fund:This work was financially supported by the National Natural Science Foundation of China (51772139)

About author:: Zongwei Xue obtained his B.E. degree from the University of Science and Technology Liaoning (USTL). He is currently a master degree candidate. His research interests are high temperature ceramics and refractories for new metallurgical technologies.
Feng Wu obtained his D.E. degree from the University of Science and Technology Liaoning (USTL) and served in school of High Temperature Materials and Magnesium Resources Engineering, USTL till now. He is currently an associate professor and master supervisor. He performed academic visiting in 2014—2015 in Functional Material Laboratory, University of Exeter, UK. He has published thirteen journal papers, applied three national invention patents and one of them were authorized. His research interests are refractories for new metallurgical technologies and high temperature ceramics. He has finished more than twenty research projects, obtained two times of Provincial Science and Technology Progress Third Award, one time of Municipal Science and Technology Progress First Award,compiled two textbooks.

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	XUE Zongwei
	LI Xinwei
	LUAN Xu
	LUO Xudong
	XU Ruomeng
	WU Feng

Cite this article:

XUE Zongwei,LI Xinwei,LUAN Xu, et al. Effects of Nano-zirconia on Thermal Shock Resistance of Magnesia Ceramic[J]. Materials Reports, 2019, 33(10): 1630-1633.

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http://www.mater-rep.com/EN/10.11896/cldb.17090144 OR http://www.mater-rep.com/EN/Y2019/V33/I10/1630

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