氮化硅粉体水基悬浮液电动特性的研究

Study on Electrokinetic Behavior of Aqueous Silicon Nitride Suspensions

通过测量氮化硅粉体在水溶液中的Zeta电位和颗粒大小 ,研究了不同条件下氮化硅水基悬浮液的电动特性。结果表明 ,溶液的pH值以及引入的聚电解质不同均会使氮化硅颗粒表面的荷电状态发生变化 ,进而导致粉体在水溶液中的分散状况发生改变。在碱性条件下添加适量的阴离子聚电解质有利于氮化硅水基悬浮液的稳定分散。

Electrokinetic behavior of aqueous silicon nitride suspensions was stud ied by measuring zeta potential and effective particle size.Results indicated th at such parameters as pH value and type of polyelectrolytes affected the surface Charge and the stability of silicon nitride suspensions.Proper addition of anio nic polyelectrolyte could lead to finely dispersed silicon nitride suspensions.