Synthesis and Properties of <TEX>$Al_2O_3-SiC$</TEX> Composites from Alkoxides

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J. Korean Ceram. Soc. > Volume 30(2); 1993 > Article

Journal of the Korean Ceramic Society 1993;30(2): 123.

알콕사이드로부터 $Al_2O_3-SiC$ 복합재료의 제조 및 특성

이홍림, 김규영

연세대학교 공과대학 세라믹공학과

Synthesis and Properties of $Al_2O_3-SiC$ Composites from Alkoxides

ABSTRACT

Dispersed type Al2O3-SiC composite powders were synthesized from Al-isopropoxide (Al(i-OC3H7)3) and Si(OC2H5)4 precursors by hydrolysis of mixed alkoxides and carbothermal reaction method. The characteristics of the synthesized (dispersed type) Al2O3-SiC composite powders were investigated using XRD, SEM, TEM, BET and particle size analyzer. Carbothermal reaction to produce Al2O3-SiC composite was completed in 10h at 135$0^{circ}C$ on 3~4㎤/s (0.21~0.28cm/s) of H2 flow rate and about 1/1 of carbon/oxides(=SiO2＋Al2O3) molar ratio. The synthesized powders were observed to have the mean particle size range of 0.4~1.26${mu}{textrm}{m}$ and showed finer particle size with increasing SiC content.