Dispersion of nanoscale BaTiO3 suspensions by a combination of chemical and mechanical grinding/mixing processes

Kuo Liang Ying, Tsung-Eong Hsien*

*Corresponding author for this work

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

The colloidal stability of aqueous nanometer-and micrometer-scale barium titanate (BaTiO3) utilizing poly (methacrylic acid) (PMAA-Na) and Polyacrylamide/ (a-N,N-dimethyl-N-acryloyloxyethyl)ammonium ethanate (PDAAE) was investigated. In addition to chemical dispersants, the effects of mechanical milling using either conventional ball milling or nanogrinding/-mixing on the dispersion of BaTiO3 suspensions were also studied. Characterization of the particle size distribution (d50), viscosity, and morphology of BaTiO3 particles in the suspensions revealed that a sole chemical dispersant or mechanical milling was insufficient to achieve nanometer-scale dispersion. The best dispersion results were obtained with a combination of PMAA-Na dispersant and nanogrinding/-mixing, which could provide sufficient electronic repulsive force and shear force to disperse the 80-nm BaTiO 3 powders uniformly in the aqueous suspension.

Original languageEnglish
Pages (from-to)1550-1556
Number of pages7
JournalJournal of Applied Polymer Science
Volume106
Issue number3
DOIs
StatePublished - 5 Nov 2007

Keywords

  • BaTiO
  • Chemical dispersant
  • Nanogrinding
  • Nanometer-scale dispersion

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