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J. Korean Ceram. Soc. > Volume 30(7); 1993 > Article
Journal of the Korean Ceramic Society 1993;30(7): 571.
Sol-Gel법에 의한 $ZrO_2/Al_2O_3$ 복합체의 제조에 미치느 Seeding 효과
김선욱, 주치홍, 장윤식, 손영국, 박홍채
부산대학교 무기재료공학과
The Effect of Seeding on Preparation of $ZrO_2/Al_2O_3$ Composite by Sol-Gel Method
ABSTRACT
The effect of $alpha$-Al2O3 seeding on preparation of zirconia/alumina gel fragment prepared by sol-gel processing was characterized through XRD, SEM, TG/DTA and IR analysis. Aluminum isopropoxide and zirconium butoxide were used as starting materials. $alpha$-Al2O3 seeding restrained grain growth of alumina and zirconia, and decreased tetragonal to monoclinic phase transformation of zirconia on cooling. Therefore, fine zirconia-toughened alumina composite having the relative sintered density of about 98% of theoretical at 140$0^{circ}C$ for 2h could be obtained.
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