摘要：采用鼓泡碳化法 ,在最佳反应温度、反应物浓度的条件下 ,考察了添加剂对产物形状及粒径大小的影响 ,得到了直径为 2 0～ 30nm、长径比在 2 0左右且分散性能良好的针状纳米碳酸钙 ,并对添加剂作用机理进行了分析。

关键词：纳米碳酸钙；针状晶体；添加剂；机理

Abstract：T he additive is used to control the size and the shape of CaCO₃。Needle-like nanometer CaCO₃ with the diameter of 20～30nm and the aspect ratio of 20are synthesized by introducing CO₂ to lime suspension under the optimum condition．The products are imparted high dispersibility．T he mechanism of additive is studied．

Keywords： nanometer CaCO₃；needle-like crystal；additive； mechanism