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采用正交实验设计方法，通过SEM分析，研究了反应温度、Ca(OH)2浓度、不同添加剂及其加入量等因素对CaCO_3的结晶形态和粒径的影响, 得出合成立方晶形纳米CaCO_3的优化反应条件为：反应温度10℃、碳化液Ca(OH)2浓度0.25 mol/L、以EDTA-2Na为添加剂、 添加量为EDTA-2Na:CaO = 3:1000. 添加剂的加入量少，不足以抑制CaCO_3的生长；而加入量过多，则容易产生凝聚. 随着反应温度升高，CaCO_3的结晶呈现高面网密度的晶体形态.
The effects of reaction temperature, Ca (OH) 2 concentration, different additives and their addition amount on the crystal morphology and particle size of CaCO_3 were studied by means of orthogonal experimental design and SEM. The effects of synthesis temperature, Ca (OH) The optimal reaction conditions were as follows: the reaction temperature was 10 ℃, the concentration of Ca (OH) 2 in the solution was 0.25 mol / L, and the content of EDTA-2Na was EDTA-2Na: CaO = 3: 1000. In order to restrain the growth of CaCO_3, but when the added amount is too much, aggregation easily occurs.With the increase of the reaction temperature, the crystallization of CaCO_3 shows the morphology of high surface network density.