【摘要】 研究了碳酸钙晶须的制备方法,探索了以MgCl2为促进剂时碳酸钙晶须生长的影响因素,通过正交实验找到了制备碳酸钙晶须的最佳条件,即MgCl2浓度为0.50 mol/L,温度90℃,搅拌速度为250 r/min,CO2流量为1 mL/min;采用偏光显微镜、X射线衍射仪对碳酸钙晶须结构进行了表征,所制备的产物中晶须质量分数在97%以上,长径比为20~30。更多还原

【Abstract】 The preparation methods of calcium carbonate whiskers were studied.The factors influencing the growth of calcium carbonate whiskers had been investigated when using magnesium dichloride as a crystalline controller.According to orthogonal test,the optimum parameters were obtained,i.e.,the concentration of MgCl2 is 0.5 mol/L,the temperature is 90 ℃,the speed of stirring is 250 r/min and the flux of CO2 is 1 mL/min.The whiskers were characterized by powder X-ray diffraction(XRD) and polarizing microscope.The characterization results show that the mass fraction of calcium carbonate whiskers prepared is over 97%,with its aspect ratio range between 20 and 30.更多还原