以轻烧粉制备六方片状氢氧化镁  

Preparation of Hexagonal-sheet Magnesium Hydroxide by Surfactant Free Method

作　　者：孙晓君 丁珂 仇龙 李会杰 黄娜娜 李雪 SUNXiaojun;DING Ke;QIU Long;LI Huijie;HUANG Nana;LI Xue(Liaoning Key Laboratory of Chemical Application,College of Chemical Engineering,Shenyang University of ChemicalTechnology,Shenyang 110142,China;Liaoning Collaborative Innovation Center of Fine Chemical Industry,Shenyang 110142,China)

机构地区：[1]沈阳化工大学化学工程学院辽宁省化工应用重点实验室,沈阳110142 [2]辽宁精细化工协同创新中心,沈阳110142

出　　处：《硅酸盐学报》2019年第4期538-544,共7页Journal of The Chinese Ceramic Society

基　　金：辽宁省自然科学基金项目(L2015020609);辽宁省教育厅项目(LFD2017003);辽宁省创新团队项目(LT2013010)资助

摘　　要：主要以轻烧粉和硝酸铵为原料,经过蒸氨反应得到蒸氨精制液,不加任何添加剂,再以氨水为沉淀剂,制备高品质的六方片氢氧化镁。研究了蒸氨过程中镁离子浓度随蒸氨温度和蒸氨时间的变化规律以及在沉镁过程中,氨镁比、沉镁温度对氢氧化镁形貌和粒径的影响。结果表明:氨水法制备的氢氧化镁为规整六方片形、粒度在1～2μm之间,(001)面的X射线衍射强度远远大于(101)面,说明其表面极性较低、分散性较好,而且该产品分解温度为335.4℃,具有良好的热稳定性,可以用作工业级阻燃剂。A high-quality hexagonal magnesium hydroxide was prepared using ammonia water as a precipitant,and light-burning powder and ammonium nitrate as raw materials without any additives.The evaporated ammonia refining solution was obtained by ammonia evaporation.The magnesium ion concentration changes with ammonia evaporation temperature and time in the ammonia evaporation process.The effects of ammonia-magnesium ratio and reaction temperature on the morphology and particle size of magnesium hydroxide in precipitation magnesium were investigated.The experimental results show that magnesium hydroxide prepared by ammonia water method is regular hexagonal plate with the size of 1–2μm.The X-ray diffraction intensity of the(001)plane is greater than that of the(101)plane,indicating that the surface polarity is low.The product with the well-dispersibility and the decomposition temperature of 335.4℃can be obtained,having a good thermal stability,and it can be used as an industrial grade flame retardant.

关 键 词：轻烧粉 氨水法 六方片氢氧化镁 阻燃剂 

分 类 号：TQ175[化学工程—硅酸盐工业]