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J. Korean Ceram. Soc. > Volume 51(4); 2014 > Article
Journal of the Korean Ceramic Society 2014;51(4): 324.
doi: https://doi.org/10.4191/kcers.2014.51.4.324
다양한 분산제에 의한 AlN-Y2O3 혼합분말의 비수계 용매 중 분산특성
김신, 방상우, 황인준, 윤상옥, 신현호
강릉원주대학교 재료공학과
Dispersion Characteristics of AlN-Y2O3 Powder Mixture by Various Dispersants in Non-aqueous Solvents
Shin Kim, Sang-Woo Bang, Injoon Hwang, Sang-Ok Yoon, Hyunho Shin
Departmernt of Materials Engineering, Gangneung-Wonju National University
The dispersion characteristics of AlN-4.5 wt% $Y_2O_3$ powder mixture by various dispersants were investigated in ethanol and methyethly-ketone (MEK) solvents. In general, the cationic polymer dispersants demonstrated superior dispersion of the powder as compared to the non-ionic ester-type dispersants or anionic phosphate-ester-based ones. The dispersion performance of the cationic polymer dispersants was sensitive to the type of solvent. An anhydric maleic-acid-based graft copolymer dispersant, AFB-1521, demonstrated a very good dispersion capability in ethanol but exhibited a much inferior dispersion in MEK. On the other hand, the dispersion of the powder mixture was very good with a phosphate-ester-based block polymer dispersant, BYK-111, in MEK solvent, while dispersionwas much degraded in ethanol.
Key words: Aluminum nitride, Yttria, Dispersion, Dispersant, Tape casting
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