摘要
以轻烧粉与氯化铵反应得到的精制氯化镁溶液为原料,氨气为沉淀剂,通过改变反应温度控制反应体系过饱和度,变温反应制备出高分散纳米氢氧化镁,并利用扫描电镜(SEM)、X射线衍射(XRD)和激光粒度分布仪对产品进行了表征。实验研究了变温反应与恒温反应产品形貌和粒径的区别,结合液相体系中OH-浓度随反应温度的变化过程,分析讨论了变温法制备高分散纳米氢氧化镁的机理。
High dispersion nano magnesium hydroxide were prepared via controlling the supersaturation of reaction system by changing reaction temperature using refined magnesium chloride solution obtained by the reaction of light calcined powder with ammonium chloride as raw material and gaseous ammonia as precipitant.The products were characterized by scanning electron microscopy（SEM）,X-ray diffraction（XRD） and laser particle analyzer.The morphology and particle size of magnesium hydroxide products prepared by isothermal method were compared with the products prepared by changing temperature method,and based on the variation process of the OH-concentration with reaction temperature,the mechanism of the preparation process of high dispersion nano magnesium hydroxide via changing temperature method was analyzed and discussed.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2013年第3期424-427,共4页
Journal of Functional Materials
基金
国家自然科学基金资助项目(20576072)
关键词
纳米氢氧化镁
变温反应
机理
nano magnesium hydroxide
changing temperature
mechanism
