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用黏度法测定了不同固相含量(体积分数,)在分别改变分散剂用量(质量分数,Cw)时,3Y-TZP悬浮体系的黏度(η)变化规律;用光散射法测量了不同Cw下稀悬浮体系中粒子的直径;用扫描电子显微镜(SEM)摄取了悬浮体系沉积物的表面形貌.由前述结果,分析和讨论了粒子吸附层微观结构的变化和它们间相互作用对分散相粒子稳定性的影响,给出了3Y-TZP悬浮体系稳定性的不同分散状态:两种稳态及两种非稳态,绘制了悬浮体系的Cw-η,Cw-和-η二元及Cw--η三元稳定区间工作图.根据DLVO理论,计算、绘制了不同条件下,3Y-TZP悬浮体系的分散剂用量Cw,粒子间距r,粒子间作用势能VT三元曲面势能图和Cw-r二元粒子运动稳定区间工作图.由前述三元曲面势能图计算并模拟了悬浮体系的Cw--VT,max(粒子间最高相互作用势垒)三元最高势能图和Cw-稳定区间工作图.结果表明,该理论工作图能较好地定性证明3Y-TZP悬浮体系中分散相粒子不同分散状态的存在,及悬浮体系稳定性随各参数的变化规律.
The viscosity (η) of 3Y-TZP suspension was measured by viscometry. The changes of viscosities (η) of 3Y-TZP suspensions were measured with different dispersants (mass fraction, Cw) The diameters of the particles in the suspending system were measured, and the surface morphology of the sediments in the suspending system was taken by scanning electron microscope (SEM) .According to the above results, the changes of the microstructure of the particle adsorbing layer and the interaction between them were analyzed and discussed. The stability of 3Y-TZP suspension system is also given in terms of its dispersion: two steady-state and two unsteady states, and the Cw-η, Cw- and -η binary And Cw--η ternary stability interval working diagram.According to the DLVO theory, calculated under different conditions, the amount of dispersant Cw, particle spacing r, potential energy VT ternary surface potential of the 3Y-TZP suspension system Figure and the Cw-r binary particle motion stability interval work diagram from the ternary surface potential diagram to calculate and simulate the suspension system Cw--VT, max (highest interparticle interaction barrier) ternary maximum potential energy diagram and Cw- stable interval work chart. The results show that the theoretical work chart Preferably qualitatively demonstrate the presence of 3Y-TZP suspension system different dispersion state of dispersed particles and the suspension stability of the system changing with each parameter.