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http://dx.doi.org/10.4191/kcers.2014.51.4.324

Dispersion Characteristics of AlN-Y2O3 Powder Mixture by Various Dispersants in Non-aqueous Solvents  

Kim, Shin (Departmernt of Materials Engineering, Gangneung-Wonju National University)
Bang, Sang-Woo (Departmernt of Materials Engineering, Gangneung-Wonju National University)
Hwang, Injoon (Departmernt of Materials Engineering, Gangneung-Wonju National University)
Yoon, Sang-Ok (Departmernt of Materials Engineering, Gangneung-Wonju National University)
Shin, Hyunho (Departmernt of Materials Engineering, Gangneung-Wonju National University)
Publication Information
Journal of the Korean Ceramic Society / v.51, no.4, 2014 , pp. 324-331 More about this Journal
Abstract
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.
Keywords
Aluminum nitride; Yttria; Dispersion; Dispersant; Tape casting;
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Times Cited By KSCI : 3  (Citation Analysis)
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