文献类型：期刊文献

中文题名：亚微米级α-氧化铝水悬浮液稳定性与沉降研究

英文题名：Stability and settlement of sub-micron α-alumina aqueous suspensions

作者：梅丽[1];吴秋芳[1];高玮[1]

机构：[1]华东理工大学化工学院超细粉末国家工程研究中心,上海200237

年份：2019

卷号：51

期号：1

起止页码：78

中文期刊名：无机盐工业

外文期刊名：Inorganic Chemicals Industry

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD_E2019_2020】；

语种：中文

中文关键词：α-氧化铝;亚微米粉体;悬浮稳定;窄粒级分布

外文关键词：α-alumina;submicron particle;suspension stability;narrow particle size distribution

摘要：采用机械化学法制备亚微米级窄粒级分布的α相氧化铝粉体,对比悬浮液pH、固含量、分散剂种类及用量和温度等不同因素的影响,利用Zeta电位、沉降时间、吸光度等考察其分散稳定性,考虑了颗粒在水中的相互作用及小颗粒的布朗运动,通过纳米粒度电位仪、激光粒度分析仪、紫外分光光度计等探索表征不同因素对悬浮稳定性的影响。研究结果表明:选用质量分数为1%的六偏磷酸钠作分散剂,p H在11左右时,得到分散稳定的氧化铝粉体,其亚微米级氧化铝粉体在高温条件下比低温条件下悬浮稳定性更好。
Submicronα-alumina with narrow particlesize distribution was prepared by mechanical-chemical method.Disper-sion stability of theα-alumina suspension was characterized by Zeta potential,the settling time,the size distribution and absorbance for UV.The interaction of particles in suspension,as well as Brownian motion was studied by many factors,like pH,different kinds and dosages of dispersants,concentration and temperature.The obtained samples were characterized by laser particle size instrument,Zeta potentiometer,and ultraviolet spectrophotometer.The research results showed that the stable dispersedα-alumina suspension could be obtained by adding the 1%(mass fraction)sodium hexametaphosphate as dispersant and adjusting pH at about 11.It was also found that higher temperature was better than lower temperature for its stability.