標題: | Dispersion of nanoscale BaTiO3 suspensions by a combination of chemical and mechanical grinding/mixing processes |
作者: | Ying, Kuo-Liang Hsieh, Tsung-Eong 材料科學與工程學系 Department of Materials Science and Engineering |
關鍵字: | BaTiO3;nanometer-scale dispersion;chemical;dispersant;nanogrinding |
公開日期: | 5-十一月-2007 |
摘要: | The colloidal stability of aqueous nanometer- and micrometer-scale barium titanate (BaTiO3) utilizing poly (methacrylic acid) (PMAA-Na) and polyacrylamide/(alpha-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 (d(50)), 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 BaTiO3 powders uniformly in the aqueous suspension. (C) 2007 Wiley Periodicals, Inc. |
URI: | http://dx.doi.org/10.1002/app.24935 http://hdl.handle.net/11536/10127 |
ISSN: | 0021-8995 |
DOI: | 10.1002/app.24935 |
期刊: | JOURNAL OF APPLIED POLYMER SCIENCE |
Volume: | 106 |
Issue: | 3 |
起始頁: | 1550 |
結束頁: | 1556 |
顯示於類別: | 期刊論文 |