机械化学法合成纳米ZnO粉体  

Preparation and Characterization of Nanostructured ZnO Particles by Mechanochemical Processing

作　　者：林元华[1] 翟俊宜[1] 王海峰[2] 蔡宁[1] 南策文[1] 

机构地区：[1]清华大学材料科学与工程系新型陶瓷与精细工艺国家重点实验室,北京100084 [2]清华大学化学系,北京100084

出　　处：《无机材料学报》2003年第3期673-676,共4页Journal of Inorganic Materials

基　　金：国家自然科学基金(50072010)

摘　　要：利用机械化学法合成了单相ZnO粉体,XRD分析结果表明,ZnSO_4/NaOH(mol比)在1/2.1～1/3.0之间均可合成ZnO粒子,ZnO产率在ZnSO_4/NaOH为1/2.5时最大,TEM分析表明,ZnO粒子的粒径在40～80nm范围,对于反应机理,认为是固-固反应中放出的大量的热,使Zn(OH)_2直接转化为ZnO粒子,光吸收性能表明,纳米ZnO粉体的紫外吸收性能(200～400nm)较普通ZnO粉体强得多。ZnO nanoparticles were synthesized by the mechanochemical processing. XRD patterns indicate all products are single ZnO phase while ZnSO4/NaOH(mol ratio)is in the range from 1/2.1 to 1/3.0, and ZnO yield will obtain the maximum when ZnSO4/NaOH(mol ratio) is 1/2.5. TEM micrographs show the particle size of ZnO is about 40similar to80nm. The heat released by the solid-solid reaction of ZnSO4 and NaOH makes the product of Zn(OH)(2) tramsform directly to ZnO particles. The optical absorptivity of ultraviolet (200similar to400nm) for nanometer ZnO is much better than that of normal ZnO powders.

关 键 词：机械化学法 纳米ZNO 光吸收 

分 类 号：TF123[冶金工程—粉末冶金]