铁酸钬与铁酸钐纳米晶的制备及其甲醛敏感特性研究
发布时间：2019-06-04 16:27
【摘要】：用固相反应法制得钙钛矿型复合氧化物铁酸钬(HoFeO_3)与铁酸钐(SmFeO_3)纳米粒子。用X射线衍射仪和透射电镜对产物进行了表征,探讨了煅烧条件对产物的影响,并研究了其纯相材料对甲醛的敏感特性。结果表明:分别在1000℃和950℃煅烧反应物料2h即可获得纯相HoFeO_3和SmFeO_3纳米粒子;HoFeO_3与SmFeO_3元件分别在其最佳工作温度315℃和270℃下对浓度为20×10-6甲醛气体的灵敏度分别为20.4和3.8,响应-恢复时间分别为25s和10s、20s和18s,具有一定的应用价值。
[Abstract]:Perovskite composite oxides holmium ferrate (HoFeO_3) and samarium ferrate (SmFeO_3) nanoparticles were prepared by solid state reaction. The product was characterized by X-ray diffractometer and transmission electron microscope, the effect of calcination conditions on the product was discussed, and the sensitivity of pure phase material to formaldehyde was studied. The results show that pure phase HoFeO_3 and SmFeO_3 nanoparticles can be obtained by calcination at 1000 鈩，
本文编号：2492845
[Abstract]:Perovskite composite oxides holmium ferrate (HoFeO_3) and samarium ferrate (SmFeO_3) nanoparticles were prepared by solid state reaction. The product was characterized by X-ray diffractometer and transmission electron microscope, the effect of calcination conditions on the product was discussed, and the sensitivity of pure phase material to formaldehyde was studied. The results show that pure phase HoFeO_3 and SmFeO_3 nanoparticles can be obtained by calcination at 1000 鈩，
本文编号：2492845
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