| 摘要 |
PURPOSE: A preparation method of nano-sized indium tin oxide(ITO) powder by metal-organic decomposition(MOD) is provided. The resultant ITO powder has a smaller particle size and higher purity, good reproducibility, lower cost due to simple process and equipment than ITO powder prepared by conventional method(sol-gel, coprecipitation, etc). CONSTITUTION: The ITO powder is prepared by the following steps of: (S1) dissolving indium acetate and C16H36Sn into 2-ethylhexanoic acid to be a In/Sn molar ratio of 1.86 : 0.14; (S2) heating the mixture at 200deg.C to volatilize a reaction product, acetic acid, and stirring to get a transparent yellow ITO sol; (S3) aging the formed yellow sol over 5hrs to get a concentrated ITO sol; (S4) drying the ITO sol at 200deg.C; (S5) thermal treating at 300-700deg.C. The resultant ITO powder obtained without washing unlike conventional method, is spherical and has 40-60nm size and high purity.
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