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Effect of Y2O3 and La2O3 on the Sintering Behavior of Alumina

Y2O3 및 La2O3 첨가가 알루미나의 소결거동에 미치는 영향

  • Received : 2015.12.31
  • Accepted : 2016.01.11
  • Published : 2016.02.27

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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