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Comparative humidity sensing based on Fe_2O_3 synthesized via different methods

机译：基于不同方法合成FE_2O_3的比较湿度感测

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Ferric oxide nanomaterial was synthesized by two hydrothermal precipitation methods as B_1 and B_2. Pellets as sensing elements were subjected to specially designed humidity chamber and variations in resistance with relative humidity (%RH) were measured. Pellet prepared from B_2 reveal maximum average sensitivity 6.61 MΩ/%RH. Structural analysis confirmed the formation of Fe_2O_3 with α-phase and rhombohedral structure. Average crystallite size of materials for B_1 and B_2 were found 40 and 18 nm respectively. SEM images show more porosity (largest surface area) of material for B_2. TEM image of material for B_2 shows uniform distribution of particles having average particle sizes are around 2 nm. Optical and thermal properties were investigated by using UV-visible absorption spectroscopy and Differential scanning calorimetric techniques.
机译：通过两种水热沉淀方法作为B_1和B_2合成氧化铁纳米材料。 作为感测元件的颗粒经受特别设计的湿度室，并测量具有相对湿度（％RH）的抗性的变化。 由B_2制备的颗粒显示最大平均灵敏度6.61MΩ/％RH。 结构分析证实了Fe_2O_3与α相和菱形结构的形成。 B_1和B_2的平均微晶尺寸分别为40和18nm。 SEM图像显示更多的孔隙率（最大的表面积）的B_2。 用于B_2的材料的TEM图像显示出平均粒径的颗粒的均匀分布是约2nm。 通过使用UV可见吸收光谱和差示扫描量热技术来研究光学和热性能。

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