碳化硅悬浮浆料粘度损失研究  

Research on the Viscosity loss of SiC Powder Slurry

作　　者：武七德[1] 屠隆[1] 刘开松[1] 李娜[1] 

机构地区：[1]武汉理工大学硅酸盐材料与工程教育部重点实验室,武汉430070

出　　处：《山东陶瓷》2011年第3期23-26,共4页Shandong Ceramics

摘　　要：用硅烷偶联剂对1.2μSiC粉接枝改性,和100μSiC粉调制浆料,研究了SiC粉表面Zeta电位和浆料固相体积含量、粘度增量之间的关系;在碱性条件下,SiC表面水解是导致Zeta电位变化和浆料粘度损失的原因。考察了润湿剂烷基聚氧乙烯醚(Alcohol Ethoxylate,AEO)对浆料Zeta电位和粘度损失的影响,AEO含量为0.08wt%时,68vol%的改性浆料搅拌12h后,Zeta电位变化量由22%减少至10%,粘度增量由630mPa·s减少至230mPa·s,坯体密度提高到2.69g/cm^(-3)。Silane coupling agent grafted to 1.2μSiC powder and graded with 100μSiC powder,studies the relationship of SiC powder Zeta potential and slurry solid-phase volume content,viscosity increment. In alkaline conditions,SiC surface hydrolysis is the reason of the Zeta potential changes and paste viscosity loss.Inspects the wetting agents ethylene oxide,Ethoxylate Alcohol ether（AEO）to the influence of Zeta potential loss.Joining 0.08wt%AEO,68vol%of modified slurry after stiring 12h,Zeta potential loss reduced from 22%to 10%,viscosity increment from 630mPa？s to 230mPa ？s and green density increased to 2.69 g/cm^（-3）.

关 键 词：碳化硅 润湿剂 Zeta电位变化 粘度增量 

分 类 号：TQ174.4[化学工程—陶瓷工业]