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日本松下电气公司已经制成一种新型高灵敏气体敏感元件,它不仅对丙烷、丁烷和氢气敏感,而且对于过去普通气敏元件来探测都很困难的甲烷也敏感。因此,它适用于包括天然甲烷气体在内的各种类型的城市的气体的探测。这种新型的陶瓷半导体气敏元件采用烧结铁复合氧化物(α-型氧化铁:α-Fe_2O_3)作为敏感元件,从而不再需要贵金属催化剂)。松下新型高性能和高可靠性的气体敏感元件可望在漏气报警装置和防止漏气爆炸用的自动气体阀门装置中找到更广泛的应用。普通气敏元件现有两种型式:①“半导体型”气敏元件可通过探测诸如氧化锡(SnO_2)和氧化锌(ZnO)等半导体材料中电阻突然降低来感知易燃气体。当这些材料
Japan’s Matsushita Electric has made a new type of highly sensitive gas sensor that is sensitive not only to propane, butane and hydrogen, but also to methane, which has hitherto been difficult to detect by conventional gas sensors. Therefore, it is suitable for the detection of gases in various types of cities including natural methane gas. This new type of ceramic semiconductor gas sensor uses sintered iron composite oxide (α-type iron oxide: α-Fe 2 O 3) as a sensing element, eliminating the need for precious metal catalysts. Panasonic’s new high-performance and high-reliability gas sensing elements are expected to find wider use in leak detection alarms and automatic gas valve assemblies for preventing air leaks. There are two types of common gas sensors: ① “Semiconductor” gas sensors detect flammable gases by detecting a sudden drop in resistance in semiconductor materials such as tin oxide (SnO 2) and zinc oxide (ZnO). When these materials