异型纳米AlOOH微观晶体结构  

Structure of heterotypic nano AlOOH microcrystals

作　　者：郝保红[1] 方克明[2] 向兰[3] 

机构地区：[1]北京石油化工学院机械工程系,北京102617 [2]北京科技大学冶金与生态工程学院,北京100083 [3]清华大学反应工程系,北京100084

出　　处：《北京科技大学学报》2012年第7期817-822,共6页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金资助项目(50574051)

摘　　要：利用RTO金属包埋切片微米--纳米表征法,通过高分辨透射电镜观察了γ--AlOOH薄膜切片中的晶格点阵条纹像,分析了添加复合添加剂后异型纳米AlOOH的微观晶体结构,从原子层面揭示了由于铁离子的同晶替代以及硫酸根离子的插层而导致的晶格畸变.阐述了极性添加剂在晶须生长过程中首先形成复合的高聚体、进而定向生长的诱导机理,并指出了非极性表面活性剂对异型纳米AlOOH晶体形貌表面的修复和'美容'作用.用能谱及红外光谱佐证了复合多聚体的存在.Using RTO metal embeds cutting film micron-nano token method, the lattice fringe images of γ-AIOOH film slices were observed by high-resolution transmission electron microscopy, and the microstructure of heterotypic nano AIOOH with additive package was analyzed. It is revealed that the isomorphous replacement of iron ions and the intercalating of sulfate ions result in the lattice distor- tion. During crystal whisker growth, a composite polymer firstly forms, and then directionally grows; also the apolar surfactant has the functions of surface-restoring and beautifying the crystal morphology. X-ray diffraction analysis and infrared spectra are used to validate the existence of the composite polymer.

关 键 词：铝化合物 微晶 晶体结构 纳米晶须 纳米颗粒 添加剂 

分 类 号：TB383[一般工业技术—材料科学与工程] TQ133.1[化学工程—无机化工]