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复合电解质溶液中纳米SiO2颗粒分散性及其表面动电电位 被引量:1

Size Distribution and Dynamic Potential of Nano-SiO2 Particles in Electrolyte Solutions
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摘要 针对含有纳米二氧化硅(n-SiO2)颗粒的硫酸镍盐复合电解质溶液,研究了溶液n-SiO2颗粒的分散性、动电电位(ζ)及其影响因素.结果表明:复合电解质溶液中SiO2颗粒表面ζ电位值为负值,且其绝对值随着pH值增大而增大;ζ电位影响纳米颗粒在溶液中的分散稳定性.电解质浓度影响纳米颗粒的分散性,在以Na2SO4溶液为稀释剂时,电解质中SO42-浓度为0.125 mol/L时,溶液中颗粒粒度分布范围最小,小尺寸颗粒含量最高;颗粒粒径分散效果与前处理溶液中纳米颗粒含量有关,前处理料浆中纳米颗粒含量越低,其粒度越小,分散效果越好.
出处 《过程工程学报》 CAS CSCD 北大核心 2004年第z1期59-63,共5页 The Chinese Journal of Process Engineering
基金 国家973项目子项(G1999065009) 中英科技合作基金项(2002M3) 国家自然科学基金重点项目(50235030)的资助
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共引文献82

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