利用轻烧镁粉制备纳米氢氧化镁工艺与机理研究  

Studyon the process and mechanism of preparation of nano-magnesium hydroxide by light burning magnesium powder

作　　者：李男 冉言 杜高翔[1,2] 帅欢 任凤国 王佼[3] LI Nan;RAN Yan;DU Gaoxiang;SHUAI Huan;REN Fengguo;Wang Jiao(College of Materials Science and Engineering, China University of Geosciences (Beijing),Beijing 100083, China;Non-metallic Minerals and Solid Waste Resources Materials Utilization Beijing Key Laboratory,Beijing 100083, China;Beijing Polytech College of Fundamental Education, Beijing 100042, China)

机构地区：[1]中国地质大学(北京)材料科学与工程学院,北京100083 [2]非金属矿物与固废资源材料化利用北京重点实验室,北京100083 [3]北京工业职业技术学院基础教育学院,北京100042

出　　处：《功能材料》2020年第2期2131-2136,共6页Journal of Functional Materials

基　　金：中央高校基本科研业务费优秀教师基金资助项目(53200759392);校内重点资助项目(应用性招标)(BGY2018KY-07ZY);校内重点资助项目(应用性招标)(BGY2019KY-17ZY);校内重点资助项目(应用性招标)(BGY2019KY-18ZY);北京市科技计划重点资助项目(KZ201910853043)

摘　　要：探讨了以轻烧镁粉和蒸馏水为原料,采用机械力化学法和水化法超细研磨制备六方片纳米氢氧化镁的工艺条件。研究了在氧化镁水化过程中,搅拌磨搅拌速率-研磨时间和料浆固液比对实验产品的粒度、形貌和结构的影响,并对反应机理进行了阐述。实验结果表明最优工艺参数为轻烧镁粉:蒸馏水:研磨介质配比为1∶4∶4、研磨转速为1300 r/min、反应最佳时长为180 min。在此条件下得到的产物为纳米级氢氧化镁,经测试其粒度d50为1.04μm,d90为2.27μm。SEM分析表明样品的表面形貌为六方片状,薄片厚度大约为5~20 nm;XRD分析表明制得的氢氧化镁粉体结晶完全,其平均晶粒尺寸为6.3 nm。The process conditions of preparation of hexagonal nanometer magnesium hydroxide from light burned magnesium powder and distilled water were discussed by mechanical chemical method and hydration method.The effects of stirring agitation rate-grinding time and slurry solid-liquid ratio on the particle size,morphology and structure of the experimental products during the hydration of magnesium oxide were studied,and the reaction mechanism was described.The experimental results show that the optimal process parameters were light burned magnesium powder,distilled water,grinding medium with ratio of 1∶4∶4,grinding speed of 1300 r/min,and the optimal reaction time of 180 min.Under these conditions,the product obtained was a nano-sized magnesium hydroxide which was tested to have a particle size d50 of 1.04μm and a d90 of 2.27μm.SEM analysis showed that the surface morphology of the sample was hexagonal,and the thickness was about 5~20 nm.XRD analysis showed that the obtained magnesium hydroxide powder was completely crystallized,and its average grain size was 6.3 nm.

关 键 词：轻烧镁粉 纳米氢氧化镁 机械力化学法 表面形貌 

分 类 号：TD985[矿业工程—选矿]