摘要
以氯化镁、氯化铝、氯化钠和氢氧化钠为原料,采用共沉淀法制备了Mg-Al水滑石并以其为前体通过低温焙烧-插层重构-原位合成镁铝尖晶石(MgAl2O4)粉体。利用XRD、FTIR、SEM和EDS对样品进行表征。结果表明,镁铝摩尔比例为1∶1.5条件下制备的水滑石前体、850℃焙烧2 h以及4次重构后,可获得结晶度高、晶形良好、晶粒尺寸较小的镁铝尖晶石粉体。
Mg-Al hydrotalcites are prepared by coprecipitation method taking the MgCl2,AlCl3,NaCl and NaOH as raw materials.Using this hydrotalcites as precursor,the Mg-Al spinel powders were synthesized by low temperature roast,intercalation and reconstruction,In-situ synthesizion procedure.The samples are characterized by XRD,FTIR,SEM and EDS technology.The results show that the Mg-Al spinel powders of high crystallinity,well crystal shape,the smaller the grain size can be hold with Mg-Al ratio of 1∶1.5,the calcinations temperature of 850 ℃ and heat preservation of 2 hours,reconstruction of 4 times.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2011年第4期11-14,共4页
Journal of Wuhan University of Technology
基金
国家自然科学基金(40972033)
广西自然科学基金(2010GXNFC013003)
广西研究生教育创新计划项目(2009105960805M03)
关键词
水滑石
镁铝尖晶石
插层重构
低温焙烧
hydrotalcites
Mg-Al spinel
intercalative reconstruction
low temperature calcination
