| Home | E-Submission | Sitemap | Login | Contact Us |  
top_img
J. Korean Ceram. Soc. > Volume 27(4); 1990 > Article
Journal of the Korean Ceramic Society 1990;27(4): 501.
분무열분해법에 의한 MgO 첨가 $Al_2O_3$ 분체합성 및 소결성에 관한 연구
박정현, 조경식, 송규호
연세대학교 요업공학과
A Study on the Preparation and Sinterability of MgO-Doped $Al_2O_3$ Powders by SprayPyrolysis Method
ABSTRACT
Al2O3 and 0.25wt% MgO-doped Al2O3 powders were made from the alcohol solution of Al(NO3)3.9H2O and Mg(NO3)2.6H2O by spray pyrolysis method. Each powder was prepared at 900 and 100$0^{circ}C$. Powders prepared at 90$0^{circ}C$ were amorphous phase, but prepared at 100$0^{circ}C$ wre mainly ${gamma}$-Al2O3 crystalline form. Particle size of the MgO-doped Al2O3 powders was in the range of 0.2-2${mu}{textrm}{m}$, but undooped powders shwoed comparatively wider range of particle size. All the powders prepared at 900 and 100$0^{circ}C$ were transformed to $alpha$-Al2O3 crystalline form by calcination at 110$0^{circ}C$ for 1hr. Each powder was sintered at 1600, 1650 and 1$700^{circ}C$ for 2hrs. MgO-doped Al2O3 body sintering at 1$650^{circ}C$ showed 99% of relative density but undooped Al2O3 showed 95% of relative density, even sintered at higher temperature of 1$700^{circ}C$.
Editorial Office
Meorijae Bldg., Suite # 403, 76, Bangbae-ro, Seocho-gu, Seoul 06704, Korea
TEL: +82-2-584-0185   FAX: +82-2-586-4582   E-mail: ceramic@kcers.or.kr
About |  Browse Articles |  Current Issue |  For Authors and Reviewers
Copyright © The Korean Ceramic Society.                      Developed in M2PI