摘要
研究了以4N铟、锡锭为原料，以25％氨水为沉淀剂，采用点滴法滴加氨水的方式来制备铟锡氧化物（ITO）纳米粉体的化学液相共沉淀法。考察了反应初始铟浓度、反应温度、反应终点pH值和前驱体老化时间对ITO粉体粒径的影响。运用X射线衍射（XRD）、差热-热重分析（DTA-TG）、透射电镜（TEM）、场发射扫描电镜（SEM）等检测手段对粉体进行了表征。在液相中加入1％的硅酸钠，反应温度为60℃，反应终点pH值为8，老化时间为2h，煅烧条件为4h、800℃的工艺条件下，所制得的ITO粉体具有立方晶系结构，粉体粒径在20～40nm之间，呈球形，颗粒均匀，且分散性能良好。该方法与以前的方法相比，原料来源简单，共沉淀工艺改：善，反应条件更加温和，工艺设备简单，污染小，成本低，产品质量高，为ITO纳米粉体合成开辟了一条新的工艺路线。
Based on 4N indium and tin ingots, precipitation reagent ammonia （25% wt） added in drops, indium tin oxide （ITO） nanopowder synthesized by liquid chemical precipitation was studied. The effects of concentration of indium ion, reaction temperature, pH of reaction end and aging time of precursor on the size of ITO powder was investigated. It was characterized by X-ray diffraction （XRD）, differential thermal analysis, thermogravimetric analysis （DTA-TG）, transmission electron microscopy （TEM）, field - emission scanning electron microscope（fe-sem） etc.. When the weight of added sodium silicate was 1%, the reaction temperature was 60℃, the pH value for the end of reaction was 8, aging time was 2 h, calcining system was 4 h and 800℃, ITO nanopowder was prepared which was a spherical, uniform particles, size in 20- 40 nm. And it had cubic crystal structure and good dispersibility. Compared with previous methods, it exhibited advantages in simple source of raw materials, improvement in precipitation conditions and more moderate conditions, simple equipment, less pollution, low cost, high-quality products, and it opened up a new process line of synthesis ITO nanopowder.
出处
《化工技术与开发》
CAS
2008年第10期1-6,共6页
Technology & Development of Chemical Industry
关键词
纳米
ITO
共沉淀法
前驱体
nanometer
indium tin oxide （ITO）
coprecipitation
precursor
