Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Enhanced Dispersion of Yttria Stabilized Zirconia by Mixed Dispersants Containing Carboxyl Group in Aqueous System

수성 현탁액에서 카르복실기를 포함하는 혼합 분산제에 의한 이트리아 안정화 지르코니아의 분산성 향상

  • Kim, Soo-Hyun (Department of Mechatronics Engineering, Kyungnam University) ;
  • Kang, Jong-Bong (Department of Nano Science and Engineering, Kyungnam University) ;
  • Bae, Sung-Hwan (Department of Nano Science and Engineering, Kyungnam University)
  • 김수현 (경남대학교 메카트로닉스공학과) ;
  • 강종봉 (경남대학교 나노신소재공학과) ;
  • 배성환 (경남대학교 나노신소재공학과)
  • Received : 2017.11.14
  • Accepted : 2017.12.07
  • Published : 2018.02.27
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Abstract

Stable slurries of YSZ in aqueous suspension with added polymer dispersants, namely, poly-methacrylic acid ammonium salt (PMMA), poly-acrylic acid (PAA) and poly-acrylic-co-maleic acid (PAMA), were mixed with the monomolecular dispersants citric acid and oxalic acid. The dispersion properties of the suspension were investigated using PSA, viscosity, sedimentation, and FT-IR. The polymer dispersants and monomolecular dispersants were attached to the YSZ surface by the carboxylic group, as shown by the FTIR results. A stabilized aqueous suspension was obtained when the polymer dispersant and citric acid were mixed and compared to the use of citric acid alone as a dispersant agent. When the polymer dispersant and citric acid were mixed and milled through attrition milling, there was a smaller particle size compared to when the polymer dispersant alone was used as a dispersant agent. This study determined that the particle size of the mixed dispersant was affected by the properties of the monomolecular dispersant and that the stability of the suspension was affected by the polymer dispersant. However, when slurries of YSZ were mixed with oxalic acid, the particle bridging behavior was the result of the high degree of viscosity and the small sedimentation height.

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References

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