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Microstructure and sensing properties of cryosol derived nanocrystalline tin dioxide

机译:低温溶胶衍生的纳米二氧化锡的微观结构和传感性能

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摘要

The powders of nanocrystalline tin dioxide were prepared by two different methods: conventional hydrolysis of SnCl_4 in aqueous solution and novel cryosol technique. The microstructure, composition, and electrical properties of the samples were investigated. The sintered pellets obtained by means of the cryosol method are characterized by significantly higher values of electrical resistance as compared to those prepared by conventional technique. A significant effect of the microstructure on the sensing properties of nanocrystalline SnO_2 has been found. The sensitivity to H_2S of the samples synthesized by cryosol method was shown to be higher than that of the samples obtained by traditional precipitation.
机译:通过两种不同的方法制备纳米晶二氧化锡粉末:传统的水溶液中SnCl_4的水解和新颖的冷冻溶胶技术。研究了样品的微观结构,组成和电性能。与常规技术制备的那些相比,通过低温溶胶法获得的烧结的丸粒的特征在于电阻值明显更高。已经发现微观结构对纳米晶体SnO_2的感测特性的显着影响。结果表明,用低温溶胶法合成的样品对H_2S的敏感性要高于传统沉淀法获得的样品。

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