柠檬酸络合法制备ZnO粉体及表征

摘要

Choosing zinc nitrate as the starting material, citric acid as complexing agent, and using sol-gel method make high purity zinc oxide powder. Through the X ray diffraction, scanning electron microscope, laser diffraction particle size analyzer ,the powder of phase composition, morphology and particle size distribution of the characterization, and the citric acid and Zn2+ complexation reaction mechanism was analyzed The results show that, using citric acid complex legal system in 450℃ can prepare the hexagon wurtzite structure of ZnO powder materials; The powder which is made in 550℃ have high crystallinity, shape a rules, and particle size distribution is more narrow. The concentration distribution is 0. 5-1.2 um.%以硝酸锌为起始原料，柠檬酸为络合剂，采用溶胶一凝胶法制备了高纯度氧化锌粉体．通过X射线衍射仪，扫描电镜，激光衍射粒度分析仪等对粉体的晶相组成、形貌及粒度分布等进行了表征，并且对柠檬酸与Zn2＋络合反应的机理进行了分析．结果表明：采用柠檬酸络合法在450℃即可制备出六角纤锌矿结构的ZnO粉体材料；在550℃下制备的粉体结晶度较高，形状较规则，粒径分布较窄，集中分布在0．5—1．2um．