摘要
在室温(25℃)下采用CaCl_2和Na_2CO_3水溶液,不添加其他控制剂,通过快速混合溶液的方法,制备出球霰石型碳酸钙微球,考察不同浓度体系对产物的影响,并连续12 h观察所制备的碳酸钙微球在不同溶液中的转变过程。样品采用X射线衍射仪(XRD)和场发射扫描电子显微镜(FESEM)表征。结果表明:在0.5 mol/L浓度条件下,制备出的球霰石型碳酸钙微球分散性好,粒度均一;新制备的产物在母液中不稳定,较快地转变为方解石型碳酸钙菱面体,而在纯水中的稳定性较高,在无水乙醇中更加稳定。
At the room temperature （25 ℃ ）, vaterite calcium carbonate microspheres were prepared by rapidly mixing the CaCl2 and Na2CO3 aqueous solutions without other control agents.Effects of different concentration systems on the products were investigated and the transformational processes of the prepared calcium carbonate mierospheres in different solutions were observed continuously for 12 h.The obtained samples were characterized by X-ray diffraction （XRD） and field emission scanning electron microscope （FESEM）.Resuh indicated that the uniform and well-dispersed vaterite calcium carbonate microspheres were prepared when the concentration was 0.5 mol/L.The new products were unstable in mother liquors and quickly transformed to the calcite calcium carbonate rhombohedron, however, they were stable substantially in water and more stable in dehydrated ethanol.
作者
黄文艺
马蓝宇
程昊
王崇罡
李利军
Huang Wenyi Ma Lanyu Cheng Hao Wang Chonggang Li Lijun(College of Biological and Chemical Engineering, Guangxi University of Science and Technology ,Liuzhou 545006, China Guangxi Key Laboratory of Green Processing of Sugar Resources, Guangxi University of Science and Technology Collaborative Innovation Center of Guangxi Sugar Industry Key Laboratory for Processing of Sugar Resources of Guangxi Higher Education Institutes, Guangxi University of Science and Technology)
出处
《无机盐工业》
CAS
北大核心
2017年第5期18-21,共4页
Inorganic Chemicals Industry
基金
国家自然基金资助项目(31560466)
广西自然科学基金资助项目(2014GXNSFAA118402)
广西科技攻关计划项目(1348018-3)
广西高等学校高水平创新团队及卓越学者计划(桂教人[2014]7号)
广西科技大学硕士研究生创新项目(GKYC201609)
关键词
球霰石
碳酸钙微球
方解石
vaterite
calcium carbonate microspheres
calcite
