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J. Korean Ceram. Soc. > Volume 47(6); 2010 > Article
Journal of the Korean Ceramic Society 2010;47(6): 566.
doi: https://doi.org/10.4191/kcers.2010.47.6.566
Bimodal 입도분포를 보이는 AlN 분말의 테이프캐스팅 성형을 위한 분산효과
최홍수, 이상진
국립목포대학교 신소재공학과
Effect of Dispersion on Tape Casted Green Sheet Prepared from Bimodal-Type AlN Powders
Hong-Soo Choi, Sang-Jin Lee
Department of Advanced Materials Science and Engineering, Mokpo National University
Dispersion behavior of the slurries consisted of bimodal-type AlN powders was examined in non-aqueous solvent system. Azotropic solvent system and copolymer acidic dispersant were applied to the slurries. Measurements of the sedimentation height and the viscosity of the each slurry, and the test of particle size distribution of the each powder sample were conducted as examinations for the dispersion behavior at the various dispersant contents. The bimodal-type particle size distribution was continued after addition of the dispersant and small particle portions were increased as the dispersant content increases. The density of the green sheet was also increased as the dispersant content increases and a green density of $2.114;g/cm^3$ was obtained at the sample prepared from 2.4 wt% dispersant content. The increase of large particle portions resulted in the surface defects of the green sheets.
Key words: AlN powder, Dispersion, Bimodal, Tape casting, Slurry
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