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研制成功一种新型常温α—Fe_2O_3~-气敏元件。该元件是在 SnO_2基质材料中加入适量的α—Fe_2O_3~-,而不加任何贵金属。该元件具有大的比表面积,142m~2/g,以及具有微晶和无定型结构,因此对 H_2、LPG、煤气有较高的灵敏度。然而,对 CO 和 CH_4不敏感,所以该元件有一定的选择性。该元件还有一个特点就是不需要加热,这样具有低功耗、工艺结构简单、成本低、稳定等优点。对元件机理进行简单讨论。
Developed a new type of normal temperature α-Fe_2O_3 ~ - gas sensor. The element is in the SnO 2 matrix material by adding an appropriate amount of α-Fe 2 O 3 - without any precious metal. The element has a large specific surface area, 142m ~ 2 / g, as well as microcrystalline and amorphous structure, so H_2, LPG, gas has a higher sensitivity. However, it is insensitive to CO and CH 4, so the device has some selectivity. Another feature of the device is that it does not require heating, which has the advantages of low power consumption, simple process structure, low cost and stability. Simple discussion of the mechanism of components.