利用声波粒度仪、Ｚｅｔａ电位仪详细研究了金属镁离子在氧化铝粉体表面的特性吸附行为．发现Ｍｇ２＋浓度、体系ｐＨ以及浆料的固体含量都对氧化铝颗粒表面的Ｚｅｔａ电位有显著影响，在不同的实验条件下引起粉体颗粒表面电荷的反转或等电点的位移．不同ｐＨ条件下的粒度测量结果所反映的体系稳定性与Ｚｅｔａ电位较好的吻合．首次用ＡＦＭ证实了特性吸附条件下，氧化物表面水化层的存在．
The detailed electroacoustic behaviors for alumina in salt concentration of magnesium ions were determined as a function of metal ion concentration, pH, and volume content of solid. The charge reversal and the shifts of the isoelectric points were observed. The particle size distributions corresponded well to the zeta potential values. Atomic Force Microscope was used to verify the metal hydroxide coating, formed at the interface. The thickness of the coating layer was about 4nm, corresponding to 10～12 monolayers.
参考文献
| [1] | |
| [2] | Chu T W, Du D Z, Tao Z Y. Adsorption Sci. Tech., 1997, 15(2): 455--463. [2] Farid E, Emile P. Colloids and Surf. A, 2000, 168: 1--12. [3] Hoffmann M J, Petzow G. Pure & |
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