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J. Korean Ceram. Soc. > Volume 39(2); 2002 > Article
Journal of the Korean Ceramic Society 2002;39(2): 164.
doi: https://doi.org/10.4191/kcers.2002.39.2.164
Acrylate를 결합제로 사용한 수계 테이프 캐스팅에서 알루미나 슬러리의 분산 및 점성 특성
조유정, 박일석, 문주호1, 김대준2
연세대학교 세라믹공학과, 한국과학기술연구원 복합기능세라믹스연구센터
1연세대학교 세라믹공학과
2한국과학기술연구원 복합기능세라믹스연구센터
Dispersion and Rheological Characteristics of Alumina Slurries in Aqueous Tape-casting Using Acrylate Binder
Yu-Jeong Cho, Il-Seok Park, Joo-Ho Moon1, Dae-Joon Kim2
Department of Ceramic Engineering, Yonsei University, Multifunctional Ceramics Research Center, Korea Institute of Science and Technology
1Department of Ceramic Engineering, Yonsei University
2Multifunctional Ceramics Research Center, Korea Institute of Science and Technology
ABSTRACT
Measurements of sedimentation, solid loading, zeta potential, and viscosity were employed to determine a proper dispersant and its amount for a well dispersed alumina powders in aqueous alumina tape casting using acrylate as a binder. Polycarboxylic acid was the most effective one among various dispersants considered in the present study and its amount was 0.23∼0.24 g per 100 g alumina for a dispersion. Better dispersion was obtained as an increase of dispersant addition. However, the dispersion was hindered as the amount of dispersant was higher than the optimum amount because of bridging or tangling of polymer chains. Excellent aqueous alumina tapes were prepared from the slurry containing the optimum amount of the polycarboxylic acid (0.2g), alumina powders(100 g), acrylate and Benzoflex as binder and plasticizer, respectively. The viscosity of the slurry was 570 cps and the alumina loading in the tape was 57 vol%.
Key words: Dispersion, Dispersant, Water-based tape casting, Alumina
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