MgO与Y<sub>2</sub>O<sub>3</sub>共掺杂对透明氧化铝陶瓷组织与性能的影响

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Abstract Transparent alumina ceramic sheets were prepared by hydrogen sintering with micro-MgO, composite MgO+Y₂O₃(mass ratio of MgO to Y₂O₃ is 1:1) and composite MgO+La₂O₃ as sintering assistants. The morphology of ceramic materials was observed by scanning electron microscopy, and the transmittance was measured by spectrophotometer. The effects of the types of sintering aids and the content of MgO+Y₂O₃ on the transmittance of transparent alumina ceramics were investigated. The results show that the addition of trace rare earth as a sintering assistants can inhibit grain growth, reduce the number of pores in the ceramic sheet, and increase the light transmittance of the alumina transparent ceramic. The transmittance the of the sample with the additive sintering assistant MgO+Y₂O₃ is significantly higher than the sample with the single sintering assistant MgO. When the contents of the composite sintering assistants MgO+Y₂O₃ are (0.02% to 0.05%) MgO+(0.02% to 0.05%) Y₂O₃ (mass fraction), a transparent alumina ceramic sheet with the total light transmittance of 80% or more is obtained. However, when excessive sintering assistants are added, the light transmittance of alumina ceramics will eventually decreases due to the increase in the number of stomata.

Key words： alumina transparent ceramics sintering assistant pore transmittance

Received: 21 August 2019 Published: 19 June 2020

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	Articles by authors
	LIANG Jianwei
	HUANG Meipeng
	LIU Wei
	YANG Gao
	LIAN Jiao
	BO Tiezhu
	XIE Zhipeng

Cite this article:

LIANG Jianwei,HUANG Meipeng,LIU Wei, et al. Effect of Co-doping of MgO and Y₂O₃ on the structure and properties of transparent alumina ceramics[J]. Materials Science and Engineering of Powder Metallurgy, 2019, 24(6): 557-562.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2019/V24/I6/557

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