碱性水介质中纳米氧化铈的稳定分散研究
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摘要
基于水介质中纳米氧化铈(CeO_2)难以稳定分散的技术屏障,在分析纳米氧化铈理化性质的基础上,采用超声波-药剂分散方法,研究了碱性水介质中纳米CeO_2稳定分散的条件与机理。结果表明,在颗粒浓度1000 mg/L的纳米氧化铈母液中加入无机电解质SPP或PSPP,用去离子水稀释并调pH值为10.0,超声波分散-玻璃棒搅拌10 min,当SPP或PSPP浓度为1×10~(-3) mol/L时,静置30 d期间纳米CeO_2的平均粒度几乎不随静置时间变化,平均粒度稳定在160 nm左右,此介质中样品具有良好的长效稳定分散性能。
In view of the technical trouble of nano cerium oxide being difficult to be stably dispersed in aqueous medium, the condition and mechanism of nano cerium oxide dispersion in alkaline aqueous medium were studied by using ultrasonic-reagent dispersion method, based on the analysis of the physical and chemical properties of nano cerium oxide. In the research, the mother liquid of nano cerium oxide with particle concentration of 1000 mg/L, after the addition of the inorganic electrolyte such as SPP or PSPP, was diluted with deionized water and adjusted to the pH value of 10.0, then was treated by the process of ultrasonic dispersion plus glass stirring for 10 minutes. When the concentration of SPP or PSPP was 1×10~(-3) mol/L, the average particle size of nano cerium oxide was stable at 160 nm and hardly changed with the variation of standing time during 30 days, and the media had good long-term dispersion stability.
In view of the technical trouble of nano cerium oxide being difficult to be stably dispersed in aqueous medium, the condition and mechanism of nano cerium oxide dispersion in alkaline aqueous medium were studied by using ultrasonic-reagent dispersion method, based on the analysis of the physical and chemical properties of nano cerium oxide. In the research, the mother liquid of nano cerium oxide with particle concentration of 1000 mg/L, after the addition of the inorganic electrolyte such as SPP or PSPP, was diluted with deionized water and adjusted to the pH value of 10.0, then was treated by the process of ultrasonic dispersion plus glass stirring for 10 minutes. When the concentration of SPP or PSPP was 1×10~(-3) mol/L, the average particle size of nano cerium oxide was stable at 160 nm and hardly changed with the variation of standing time during 30 days, and the media had good long-term dispersion stability.
引文
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[2] 徐春涛,李平辉,李志锐,等.废弃稀土抛光粉再生利用的研究[J].稀土,2017,38(2):74-77.
[3] 周新木,阮桑桑,彭欢欢,等.类球形氧化铈的制备及抛光性能[J].稀有金属,2014,38(6):1005-1010.
[4] 王艳荣.纳米二氧化铈的资源及应用[J].广州化工,2005,20(5):24-26.
[5] 宋晓岚,杨振华,邱冠周,等.纳米氧化铈在高新技术中的应用及其制备研究进展[J].材料导报,2003,17(12):36-39.
[6] 陈杨,李霞章,陈志刚.纳米CeO2磨料对GaAs晶片的CMP性能研究[J].半导体技术,2006,31(4):253-257.
[7] 陈建清,陈杨,陈志刚,等.超细CeO2磨料对硅片的抛光性能研究[J].中国机械工程,2004,15(8):743-745.
[8] 陈杨,陈建清,陈志刚,等.纳米磨料对硅晶片的超精密抛光研究[J].摩擦学学报,2004,24(4):332-335.
[9] 徐进,苏亚,潘国顺,等.pH值和浓度对CeO2抛光液性能影响的研究[J].润滑与密封,2005,4(7):9-11.
[10] 宋晓岚,邱冠周,杨振华,等.水相介质中纳米CeO2的分散行为[J].稀有金属,2005,29(2):167-170.
[11] 吴媛媛,衣守志,魏志杰,等.氧化铈抛光液悬浮性和再分散性研究[J].中国粉体技术,2015,21(2):57-60.