摘要：为了制备出形貌更好的碳酸钙微球,以氯化钙和碳酸钠为原料,通过乙醇溶液和添加柠檬酸2种不同的方法制备。利用场发射扫描电镜、X射线衍射和傅里叶变换红外光谱等方法对制备的产物进行分析。结果表明,50%体积分数的乙醇溶液与1.0 mol·L^-1柠檬酸调控下都能制备出形貌良好的碳酸钙微球,采用柠檬酸制备的碳酸钙微球成球性较好,制备的碳酸钙微球均由不同的晶型构成。实验通过改变反应条件进一步探索了在柠檬酸控制下碳酸钙微球的成球机理。

关键词：碳酸钙；微球；乙醇；柠檬酸

Abstract：In order to prepare a better morphology of calcium carbonate microspheres, calcium chloride and sodium carbonate were used as raw materials, and two different ways were used to prepared calcium carbonate microspheres. The products were characterized by Field emission scanning electron microscope,X-ray diffraction and Fourier transform infrared spectroscopy.Results show that under the control of the volume fraction of 50%ethanol and 1.0 mol/L citric acid solution can prepared good morphology of calcium carbonate microsphres, and the morphology of as-prepared calcium carbonate microspheres better by adding citric acid than the other method, and the as-prepared samples by two methods were composed by different crystal forms. The mechanism is also discussed through changing the reaction conditions.

Keywords: calcium carbonate；microspheres；ethanol；citric acid