摘要
以水镁石、Al(OH)3和Na2CO3为原料,采用机械力化学/晶化法合成纳米水滑石,研究了干磨时间、球磨转速和球料质量比对水滑石晶体结构的影响,并采用XRD和FE-SEM等手段对水滑石的晶体结构和表观形貌进行表征.结果表明,干磨时间、球磨转速和球料质量比的增加均有利于纳米水滑石的形成,但当超过适宜实验参数,继续增加时就会有杂相生成;在干磨时间为6 h,湿磨时间为2 h,球磨转速为250 r/min,球料质量比为50的条件下得到的纳米水滑石晶型完整单一,具有规则的六边形结构,平均晶粒粒径约为40nm.
Nano-hydrotalcite（Mg6Al2（OH）16CO3·4H2O） was synthesized by mechanochemistry/crystallization method using brucite,Al（OH）3 and Na2CO3.The effects of dry milling time,milling speed and ball to powder mass ratio on crystal structure of hydrotalcite were studied,and the crystal structure and morphology were characterized by XRD and FE-SEM.Increasing dry milling time,milling speed and ball to powder mass ratio are all beneficial to the formation of nano-hydrotalcite.Well crystallized hydrotalcite,with regular hexagon shape and average particle size of 40 nm,can be successfully synthesized under 6 h of dry milling time,2 h of wet milling time,250 r/min of milling speed and a ball to powder mass ratio of 50∶1.However,impurity phases will be found in the products if the experiment parameters kept increasing after the optimum ones.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2012年第4期576-579,587,共5页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(51074037)
关键词
水镁石
机械力化学/晶化法
合成
纳米水滑石
晶体结构
brucite
mechanochemistry/crystallization method
synthesis
nano-hydrotalcite
crystal structure
