摘要
以菱镁矿为镁源,Na2CO3为沉淀剂,采用沉淀法制备了碳酸镁晶须,用扫描电子显微镜和X射线衍射仪对合成产物的形貌和结构进行了表征.研究结果表明,硫酸镁溶液的浓度对合成晶须的结构和形貌没有明显影响,而反应温度对合成产物的结构和形貌有较大的影响,低温产物为碳酸镁晶须,但碳酸镁晶须只在一定的温度范围内稳定,随着反应温度的升高,碳酸镁晶须逐渐转变为片状碱式碳酸镁.
Magnesium carbonate whiskers were prepared by precipitation method using magnesite as precursor material. The structure and morphology of the magnesium carbonate crystal were investigated by X-ray diffrac- tion and scanning electron microscopy. The results show that the concentration of the MgS04 solution has no obviously influence on the structure and morphology of magnesium carbonate whiskers. However, the structure and morphology of the products change with temperature. At low temperature, magnesium carbonate whiskers are obtained. With increasing temperature, the magnesium carbonate whiskers change gradually to flake mag- nesium hydroxide carbonate powders.
出处
《大连交通大学学报》
CAS
2013年第4期90-93,共4页
Journal of Dalian Jiaotong University
基金
辽宁省教育厅高等学校科学研究计划资助项目(2009A118)
大连市科技计划资助项目(2011F11GH149)
关键词
菱镁矿
碳酸镁晶须
沉淀法
形貌
magnesite
magnesium carbonate whisker
precipitation
morphology
