pH值对Fe-Al-Mg-MMH/钠质蒙脱土悬浮体触变性的影响

The Influence of pH on the Thixotropy of Ferric Aluminum Magnesium Hydroxide/Montmorillonite Suspension

研究了 p H值对 Fe-Al-Mg型混合金属氢氧化物 /钠质蒙脱土 (简称 MMH/MT)悬浮体触变性的影响 .发现 p H值能影响其触变性类型 :m (MMH) /m(MT) (下文中以 R表示 )较低时 (0 ,0 .0 1 3和 0 .0 5 1 ) ,随着p H增高 ,体系有由负触变性 -复合触变性 -正触变性转变的趋势 ;而 R较高的体系 (R=0 .0 91 ) ,随 p H的增高 ,体系由复合触变性向负触变性转化 .探讨了各种触变性产生的原因和 p

In this paper, we studied the influence of pH on the thixotropy of MMH/MT suspension, and it was found that pH could affect the type of thixotropy: when the mass ratio of MMH to MT(\%R\%) was relatively low(0, 0.012 and 0.051), with pH rising slowly, the suspension changed from negative thixotropy to complex thixotropy, then finally to positive thixotropy; when \%m\%(MMH)/\{\%m\%(MT)\} was relatively high(0.091), with pH rising gradually, the suspension changed from complex thixotropy to negative thixotropy. The mechanism of thixotropy is also discussed.