The Effect of Al Powder as an Additive on the Sintering of <TEX>$Al2_O_3$</TEX> (I. In air, <TEX>$1350~1550^{cire}C$</TEX>)

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J. Korean Ceram. Soc. > Volume 20(1); 1983 > Article

Journal of the Korean Ceramic Society 1983;20(1): 49.

첨가된 알루미늄 분말의 산화가 알루미나 소결에 미치는 영향(I. 공기중, $1350~1550^{cire}C$에서)

박정현, 안주삼, 김해두

연세대학교 요업공학과

The Effect of Al Powder as an Additive on the Sintering of $Al2_O_3$ (I. In air, $1350~1550^{cire}C$)

ABSTRACT

The main object of this study is to investigate the effect of Al powder as an additive on the sintering of calcined alumina comparing with that of calcined alumina alone. The degree of Al oxidation is calculated by measuring the weight increase during the firing Water absorption bulk density and compressive strength of the $Al_2O_3+Al$ system at each temperature are compared with those of $Al_2O_4$ alone. The $Al_2O_3+Al$ system shows better physical propeties than Al2O3 alone and it seems by the SEM observation that the fine oxidized Al particles(fine $Al_2O_3$ particles submicron unit) fill the interstices of the original $Al_2O_3$ par-ticles and thus result in the well-close-packed arrangement of the particles.