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研究了化学沉淀法、柠檬酸法和微波水热法等三种不同制备方法对SnO_2纳米晶粒径的影响,并通过XRD及TEM对其结构进行了表征。结果发现,用微波水热法制得的SnO_2粒径最小,为5～15nm,且分布较均匀。用化学沉淀法制备了Fe、Sb掺杂的纳米晶SnO_2粉末并测定了其电阻,发现Fe掺杂使SnO_2电阻升高、Sb掺杂使电阻下降。
The effects of chemical precipitation method, citric acid method and microwave hydrothermal method on the particle size of SnO 2 nanocrystals were studied. Their structures were characterized by XRD and TEM. The results show that the particle size of SnO_2 obtained by microwave hydrothermal method is the smallest, 5 ~ 15nm, and the distribution is more uniform. The Fe and Sb-doped nanocrystalline SnO 2 powders were prepared by chemical precipitation method and their electrical resistance was measured. It was found that the resistance of SnO 2 increased with Fe doping and the resistance decreased with Sb doping.