机械球磨对煅烧菱镁矿制备纳米片状氢氧化镁颗粒的影响  

Effect of Mechanical Milling on Preparation of Plate-shape Magnesium Hydroxide Nanoparticles from Calcined Magnesite

作　　者：杨素萍[1,2] 卢旭晨[1] 王体壮[1] 张志敏[1,2] 闫岩[1] 

机构地区：[1]中国科学院过程工程研究所多相复杂系统国家重点实验室,北京100190 [2]中国科学院研究生院,北京100049

出　　处：《过程工程学报》2011年第6期1010-1016,共7页The Chinese Journal of Process Engineering

摘　　要：以菱镁矿为原料,通过煅烧、湿法球磨、水热处理制备高分散纳米片状氢氧化镁(MH)颗粒,研究了助磨剂、球磨时间、球料质量比对所制MH颗粒的分散性、粒度和形貌的影响.结果表明,机械球磨可加速煅烧菱镁矿的水化过程,为水热晶化提供分散性较好的前躯体;以聚乙二醇400(PEG400)或聚乙烯吡咯烷酮K30(PVP)为助磨剂,球料比质量为20:1～30:1时,对轻烧MgO湿法球磨2～4h,可明显改善MH颗粒的分散性,减小其粒径,缩小粒度分布.Lamellar and well dispersed magnesium hydroxide（MH） nanoparticles were synthesized from magnesite by calcination,wet milling,and hydrothermal treatment. The effects of grinding aid,milling time,and mass ratio of ball to powder on the dispersion,particle size,and morphology of MH particles were studied. The results showed that mechanical milling could accelerate hydration process of calcined magnesite,which could provide precursor with high dispersion for the following hydrothermal treatment. When PEG400 or PVP was used as grinding aid for milling the calcined magnesite for 2～4 h with the mass ratio ball to powder between 20：1～30：1,the dispersibility of MH particles was largely improved,and the size and size distribution of MH particles were reduced.

关 键 词：机械球磨 菱镁矿 水热处理 纳米氢氧化镁 形貌 分散性 

分 类 号：TQ132.2[化学工程—无机化工]