纳米碳酸钙的晶形控制及机理研究

Research on Crystal Controland Mechanism of Nano-sizedCalcium Carbonate

采用一种新工艺———自吸式搅拌反应法制备纳米碳酸钙。通过加入不同的晶形控制剂,合成了立方状、链状、片状、球状、棒状、针状6种不同形状的纳米碳酸钙,并以晶体生长动力学为基础,从添加的种类、用量及添加时间等条件出发,研究了其对CaCO3产品的粒度和晶形的影响。

The new technology of selfsuction stirred reactor to prepare nanometer CaCO3 is used.Through adding different additives,nanometer CaCO3 with six different shapes (including cube,chain,plate,sphere,stick and needle)are synthesized.Based on the crystal growing kinetics,the influences of additive on CaCO3 are studied.From the sorts,the amount,and the adding time,the influences of additives on particle size and crystal shape are discussed.