pH值和煅烧温度对共沉淀法制备ITO纳米粉末的影响  

Effects of pH value and calcining temperature on indium tin oxide nanopowder synthesized by co-precipitation

作　　者：段雨露[1] 叶锐[1] 闫星辰[1] 戴诚[1] 谭江[1] 徐国富[1,2,3] 

机构地区：[1]中南大学材料科学与工程学院,长沙410083 [2]中南大学粉末冶金国家重点实验室,长沙410083 [3]中南大学有色金属材料科学与工程教育部重点实验室,长沙410083

出　　处：《粉末冶金材料科学与工程》2014年第3期413-420,共8页Materials Science and Engineering of Powder Metallurgy

基　　金：中南大学粉末冶金国家重点实验室开放基金资助课题

摘　　要：以纯度为99.99%的纯金属In和SnCl4＆#183;5H2O为原料，采用化学共沉淀法制备铟锡氧化物（ITO）纳米粉末。对ITO前驱体进行TG-DSC分析，并借助XRD、SEM、TEM、BET、XPS等分析测试方法对ITO粉末的物相组成、显微形貌和粒度进行表征；研究反应终点pH值和煅烧温度对制得的ITO粉末物相组成、显微形貌和粒度的影响。结果表明：在液相中加入硅酸钠，反应温度为60℃，反应终点pH值约为8，陈化60 min，在750℃煅烧2 h的条件下，所制得的ITO纳米粉末不含SnO2相，为单相结构，是1种立方结构的In2O3固溶体；粉末纯度很高（99.99%），粒径均匀，颗粒尺寸在30~60 nm之间，比表面积为34.26 m2/g，形貌为近球形，且团聚系数小。The Sn-doped In2O3（ITO） nanopowders were preparated by chemical co-precipitation with 99.99% In and SnCl4＆#183;5H2O as raw materials. The ITO precursor was analyzed by TG-DSC, and the morphology characterization, phase composition and particle size of the ITO nanopowders were characterized by XRD, SEM, TEM, BET and XPS. The effects of pH value of the reaction end and calcining temperature on the phase composition, the morphology characterization and particle size of the ITO nanopowders were investigated. The results show that the ITO nanopowders are synthesized under the conditions of adding sodium silicate in the liquid phase, reaction temperature of 60 ℃, the reaction end point at pH=8, the aging time for 60 min, and calcined system for 2 h and 750 ℃, the obtained ITO nanopowder is In2O3 solid solution with a cubic structure, which is the single structure without SnO2 phase. And the ITO powders are of high purity, uniform particle size, and good dispersibility, which is nearly spherical. The particle size of the ITO nanopowders is in the range of 30~60 nm, and the specific surface area of powders is about 34.26 m2/g.

关 键 词：PH值 煅烧温度 化学共沉淀 前驱体 INDIUM tin oxide (ITO) 

分 类 号：TF123.72[冶金工程—粉末冶金] TB321[冶金工程—冶金物理化学]