摘要
晶须碳酸钙的合成技术备受关注,其中绝大多数方法是在常重力场中,通过向反应物系中添加某种晶形控制剂,或预先添加针状碳酸钙晶种,并辅以能够促使碳酸钙晶体沿单一方向生长的磷酸系助剂。与常重力场中各种合成方法相比,超重力反应结晶法无须针状碳酸钙晶种,所合成晶须碳酸钙短轴直径可达到80～250nm,同时较佳反应温度降低约20℃,合成等物质的量的晶须碳酸钙所需反应时间与添加剂用量分别为其他方法的1/18和1/20～3/20。
The synthetic technologies of calcium carbonate whiskers are reviewed,most of which are carried out in the nor- mal gravity environment by adding some kind of morphology-control additive or needle-like crystal seeds of calcium carbonate supplemented with certain phosphate so as to prompt the crystal of calcium carbonate whiskers to grow in a certain direction to the reaction system.In contrast to ones in the normal gravity environment,high-gravity reactive precipitation implemented in high-gravity environment has shown some outstanding advantages,including the whiskers' mean shaft diameter of 80-250 nm,no need of the needle-like crystal seeds and a declination of the optimal reaction temperature by 20℃,synthesizing the same moles of calcium carbonate whiskers the time and the amount of additives required are 1/18 and 1/20～3/20 of that needed by other technologies respectively.
出处
《现代化工》
CAS
CSCD
北大核心
2004年第z1期21-22,24,共3页
Modern Chemical Industry
基金
国家自然科学基金(20236020)
北京市新星计划(9558103500)
新加坡纳米材料科技公司资助项目
关键词
碳酸钙
晶须
合成
超重力
calcium carbonate
whisker
synthesis
high-gravity
