添加ZrO2对CaAl4O7材料烧结的影响

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Abstract In order to adapt the demands for the lightweight of materials, CA₂ material was prepared after the mixture powders was pre-sintering at 1 200 ℃ for 2 h and sintering at 1 600 ℃ for 1 h by addition of ZrO₂ micro powder, and the effect of ZrO₂ addition on densification behavior of the material was discussed. The results showed that the added ZrO₂ dissolved to CA₂ by substituting Al³⁺, which would effectively promote the lattice distortion of CA₂ and the increase of Al³⁺ vacancies, and then effectively improve the sintering activity of CA₂, accelerate intercrystalline mixing and diffusion in the sintering process, thus the sintering of CA₂ was effectively promoted. At the same time, the excess ZrO₂ further filled the pores and promoted the sintering densification of CA₂ material. Based on the above factors, the sintering densification behavior of CA₂ refractory was synergistically promoted. As a result, the dense microstructure was obtained, with the apparent porosity decreased from 12.7% to 4.8% and the bulk density increased from 2.51 g/cm³ to 2.63 g/cm³ after firing at 1 600 ℃ for 1 h by addition of 2% ZrO₂, and a texture microstructure of CA₂ phases was prepared.

Key words： CA₂ lightweight ZrO₂ sintering behavior microstructure

Published: 01 July 2020

CLC number:

TB35

Fund:This work was financially supported by the Foundation of Liaoning Department of Educational (L2019lkyjc-03,L2015275), the Doctoral Startup Foundation of Liaoning Institute of Science and Technology (1810B04), the National Innovation and Entrepreneurship Training Program for College Students (201911430066, 202011430079), the Doctoral Startup Foundation of Liaoning Department of Science and Technology (2020).

About author:: Xueliang Yin received his Ph.D. degree from Nort-heastern University in 2018. He is currently a instructor in Liaoning Institute of Science and Technology. He is mainly engaged in refractories and function ceramic materials related research. He has chaired multiple fund projects of Liaoning Educational Committee of China and other research projects. More than 20 papers have been published and more than 6 patents have been declared ; Kewu Peng received his Ph.D. degree from Northeas-tern University in 2008. He is currently an associate professor in Liaoning Institute of Science and Technology. He is mainly engaged in ceramic materials related research. He has chaired multiple fund projects of Liaoning Educational Committee of China and other research projects. More than 20 papers have been published and more than 3 patents have been declared.

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	YIN Xueliang
	LIU Yang
	LI Liying
	GONG Changwei
	DU Chengwu
	MAO Bangyu
	PENG Kewu

Cite this article:

YIN Xueliang,LIU Yang,LI Liying, et al. Effect of Addition of ZrO₂ on Sintering of CaAl₄O₇ Material[J]. Materials Reports, 2020, 34(Z1): 144-147.

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http://www.mater-rep.com/EN/ OR http://www.mater-rep.com/EN/Y2020/V34/IZ1/144

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