六偏磷酸钠对几种浆体ζ电位、等电点和流变特性的影响  

Effect of SHP on Zeta potential,isoelectric point and rheological behavior of several slurries

作　　者：余同暑[1] 王守业[1] 曹喜营[1] 

机构地区：[1]中钢集团洛阳耐火材料研究院有限公司河南省特种耐火材料重点实验室,河南洛阳471039

出　　处：《耐火材料》2010年第1期11-13,共3页Refractories

摘　　要：研究了六偏磷酸钠(SHP)对SiO2微粉、α-Al2O3微粉、电熔白刚玉和尖晶石细粉的水系浆体的ζ电位、等电点与流变特性的影响。结果表明:1)对于α-Al2O3微粉、电熔白刚玉细粉和尖晶石细粉的水系浆体,SHP既能提高其ζ电位绝对值,又能改变其等电点;而对于SiO2微粉的水系浆体,SHP只提高其ζ电位绝对值。2)除SiO2微粉的水系浆体外,由ζ电位与表观黏度确定的SHP最佳用量基本一致。3)SHP对浆体中的微粉和细粉粒子均起到分散稳定作用;SHP的加入使这4种浆体均从宾汉姆流体转变为近似牛顿流体。Effect of SHP on Zeta potential,isoelectric point and rheological behavior for slurries of uf-SiO2,α-Al2O3 micropowder,white fused corundum,and spinel powder were studied.The results show that：（1）SHP can increase the Absolute value of Zeta potential and change isoelectric point of slurry of α-Al2O3 micropowder,white fused corundum,and spinel powder,but SHP only can increase the Absolute value of Zeta potential of uf-SiO2 slurry;（2）except uf-SiO2 slurry,the optimum additions of SHP determined by Zeta potential and apparent viscosity were basically coincident;（3）SHP has the dispersion effect on micropowder and fine powder in slurries,and adding SHP makes four kinds of slurries change from the Bingham fluid into Newtonian fluid.

关 键 词：六偏磷酸钠(SHP) ZETA电位 等电点 流变性 刚玉-尖晶石浇注料 

分 类 号：TQ131.12[化学工程—无机化工]