亚微米级α-氧化铝水悬浮液稳定性与沉降研究

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英文篇名：Stability and settlement of sub-micron α-alumina aqueous suspensions 作者：梅丽 ; 吴秋芳 ; 高玮 英文作者：Mei Li;Wu Qiufang;Gao Wei;National Engineering Research Center of Ultrafine Powder,College of Chemical Engineering,East China University of Science and Technology; 关键词：α-氧化铝 ; 亚微米粉体 ; 悬浮稳定 ; 窄粒级分布 英文关键词：α-alumina;;submicron particle;;suspension stability;;narrow particle size distribution 中文刊名：WJYG 英文刊名：Inorganic Chemicals Industry 机构：华东理工大学化工学院超细粉末国家工程研究中心; 出版日期：2019-01-10 出版单位：无机盐工业 年：2019 期：v.51;No.362 语种：中文; 页：WJYG201901021 页数：4 CN：01 ISSN：12-1069/TQ 分类号：84-87

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。
        Submicron α-alumina with narrow particlesize distribution was prepared by mechanical-chemical method.Dispersion stability of the α-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 p H,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 dispersed α-alumina suspension could be obtained by adding the 1%(mass fraction) sodium hexametaphosphate as dispersant and adjusting p H at about 11.It was also found that higher temperature was better than lower temperature for its stability.

引文

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