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http://dx.doi.org/10.3740/MRSK.2016.26.2.90

Effect of Y2O3 and La2O3 on the Sintering Behavior of Alumina  

Lee, Keun Bong (Department of Advanced Engineering, Kyungnam University)
Kang, Jong Bong (Department of Engineering, Kyungnam University)
Publication Information
Korean Journal of Materials Research / v.26, no.2, 2016 , pp. 90-94 More about this Journal
Abstract
In this study, to increase the strength and enhance the sintering property of $Al_2O_3$, $Y_2O_3$ and $La_2O_3$ were added; the effects of these additions on the sintering characteristics of $Al_2O_3$ were observed. Adding 1% of $Y_2O_3$ to $Al_2O_3$ repressed the development of abnormal particles and reduced the grain boundary migration of $Al_2O_3$, curbing pores to capture particles; as such, the material showed a fine microstructure. But, when over 2% of $Y_2O_3$ was added, the sintering property was reduced because of abnormal particle grain growth and pore formation in particles. Adding 1% of $Y_2O_3$ and $La_2O_3$ to $Al_2O_3$ led to the development of abnormal particles and formed pores in the particles; when over 3% of $La_2O_3$ was added, the sintering property was reduced because the shape of the $Al_2O_3$ particles changed to angled plates.
Keywords
$Al_2O_3$; $Y_2O_3$; $La_2O_3$;
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