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.
出处
《过程工程学报》
CAS
CSCD
北大核心
2011年第6期1010-1016,共7页
The Chinese Journal of Process Engineering
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
mechanical milling
magnesite
hydrothermal treatment
magnesium hydroxide nanoparticles
morphology
dispersion
