中文摘要：

研究了在MgCl2-Ca（OH）2--CO2体系中，气液法制备碳酸钙晶须的形貌和影响条件．结果显示，在此条件下制备的是具有较好形貌和高长径比，且分布均一的文石型碳酸钙晶须，并利用扫描电镜（SEM）、X-射线粉末衍射（PXRD）和傅里叶转换红外（FT—IR）光谱图等手段对其进行了表征．其最佳制备工艺为：反应温度为80℃，CO2的流量为5mL／min，搅拌速度为250r／min，MgCl2溶液浓度为0．4mol／L．

英文摘要：

The morphology and influencing factors of CaCO3 crystal whiskers were investigated by means of gas-liquid method in the system of MgCl2-Ca（OH）2-CO2. The results indicate that the aragonite calcium carbonate （CaCO3） crystals thus prepared are characteristic of a nice external form with a rather satisfactory high aspect ratio and evenly-distributed whiskers. The CaCO3 crystals were then characterized by scanning electron microscopy （SEM）, powder X-ray diffraction （PXRD） and Fourier transform infrared （FT-IR） spectroscopy. The optimum ：reaction conditions of them are as follows： reaction temperature is at 80 ℃, CO2 flow rate is 5 mL/min, stirring speed is 250 r/min, and concentration of MgCl2 is 0.4 mol/L.