用乙醇作为分散剂和保护剂,用反向沉淀法制备了Sn02纳米晶。XRD分析表明，当焙烧温度低于200℃时所合成的Sn02为非晶态纳米粒子;当焙烧温度在400～800℃时Snoz为单相纳米晶，属于四方晶系，空间群为P4/mnm。TEM分析表明，Sn02纳米粒子呈球形，随焙烧温度的升高，粒子明显增大。热失重分析表明，样品的热失重率主要取决于温度的影响，而焙烧时间的影响不大。相对密度测试表明，随Sn02纳米晶粒度的增大，粉末的密度增大。‘
Abstract
Nanocrystalline SnO2 of different sizes were prepared by the reverse dropping precipita?tion method using ethynol as the dispersive and protective reagent. XRD patterns showed that the syn?thesized SnO2 was amorphous when calcination temperature was below 200°C; but when calcination temperature reached the range of 400 ?800 cC，the prepared SnO2 was nanocrystalline with single?phase ,and was tetragonal in structure with space group P4/mnm. TEM photos revealed that the SnO2 nanoparticles were spherical m shape，and the mean sizes of SnO2 particles increased with the in?crease of calcination temperature. Weight loss analysis indicated that the weight loss of precursor mainly depended on the calcination temperature，but little depended on the calcination time. Measure?ment of relative density showed that the relative density of SnO2 nanocrystalline powder increased with the increase in SnO2 crystal sizes.
关键词
Sn /
SnO2 /
纳米晶 /
沉淀法
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Key words
Sn /
SnO2 /
Nanocrystal /
Precipitation method
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基金
长春光学精密机械学院青年基金资助项目(YJ9503-1)
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参考文献
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脚注
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