Effect of Sn~(4+) content on properties of indium tin oxide nanopowders |
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Authors: | XU Bao-qiang FENG Rui-kang YANG Bin DENG Yong National Engineering Laboratory for Vacuum Metallurgy Kunming China Faculty of Metallurgical Energy Engineering Kunming University of Science Technology Key Laboratory for Non-ferrous Vacuum Metallurgy of Yunna Province Henan Yuguang Gold Lead Group Co Ltd Henan |
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Affiliation: | XU Bao-qiang1,2,3,FENG Rui-kang4,YANG Bin1,DENG Yong1,3 1.National Engineering Laboratory for Vacuum Metallurgy,Kunming 650093,China,2.Faculty of Metallurgical , Energy Engineering,Kunming University of Science , Technology,3.Key Laboratory for Non-ferrous Vacuum Metallurgy of Yunna Province,4.Henan Yuguang Gold , Lead Group Co.,Ltd.,Henan 454650 |
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Abstract: | Indium tin oxide (ITO) nanopowders were prepared by a modified chemical co-precipitation process. The influence of different SnO2 contents on the decomposition behavior of ITO precursors, and on the phase and morphology of ITO precursors and ITO nanopowders were studied by X-ray diffractometry, transmission electron microscopy and differential thermal and thermogravimetry analysis methods. The TG-DSC curves show that the decomposition process of precursor precipitation is completed when the temperature is close to 600 ℃ and the end temperature of decomposition is somewhat lower when the doping amount of SnO2 is increased. The XRD patterns indicate that the solubility limit of Sn4+ relates directly to the calcining temperature. When being calcined at 700 ℃, a single phase ITO powder with 15% SnO2 (mass fraction) can be obtained. But, when the calcining temperature is higher than 800 ℃, the phase of SnO2 will appear in ITO nanopowders which contain more than 10% SnO2. The particle size of the ITO nanopowders is 15-25 nm. The ITO nanoparticles without Sn have a spherical shape, but their morphology moves towards an irregular shape when being doped with Sn4+. |
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Keywords: | indium tin oxide (ITO) chemical precipitation nano-particle SnO2 |
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