Influence of Solids Concentration on the Isoelectric Point of Aqueous Barium Titanate
Influence of Solids Concentration on the Isoelectric Point of Aqueous Barium Titanate
复制标题
固体浓度对钛酸钡水溶液等电点的影响
DOI：
10.1111/j.1151-2916.2000.tb01565.x
复制
发表时间：
2004
影响因子：
3.9
通讯作者：
V. Hackley
中科院分区：
文献类型：
--
作者：
U. Paik;V. Hackley
我们报告了颗粒表面电荷受 BaTiO3 水悬浮液中固体浓度影响的发现。通过结合两种不同电动方法的结果来分析三十个十年的固体浓度。综合结果表明，随着固体浓度的降低，等电点 pH 值发生系统性酸移。这种转变归因于贫Ba、富TiO2 表面层的形成。使用动力学论证，表明该层的厚度与表面积与体积之比成正比。
We report on findings that the particle surface charge is influenced by solids concentration in aqueous suspensions of BaTiO3. Three decades in solids concentration were analyzed by combining results from two different electrokinetic methods. Combined results demonstrate a systematic acidic shift in the isoelectric pH with decreasing solids concentration. The shift is attributed to the development of a Ba-depleted, TiO2-rich surface layer. Using kinetic arguments, it is shown that the thickness of this layer will be proportional to the surface-to-volume ratio.