【摘要】 在氧化钨溶凝胶中,添加10%的二氧化钛溶凝胶,煅烧后可得形成氧化钨/氧化钛复合粉体.所得粉体,以XRD、SEM、FT-IR、光学特性分析等仪器进行粉体的基本性质与结构检测.随后将氧化钨/氧化钛复合粉末包覆于气体感测电极上,进行气体感测的各种相关检测与分析.结果显示,添加10.0%氧化钛的氧化钨/氧化钛,由100℃的ε-WO3单斜晶结构,随着热处理温度达到300℃,缓慢转变成三斜晶的δ-WO3.比较不同参数的粉体,添加10.0%氧化钛的氧化钨/氧化钛具有较优异感测性质;在200℃,3×10-6的NO2下,灵敏度为29.9.而在150℃,相同浓度下,有最佳灵敏度为86.1.更多还原

【Abstract】 Tungsten oxide powders and films were prepared by sol-gel process.During the process,10%(ω) titanium oxide was added to prepare the hybrid tungsten/titanium material.After calcining at 300℃,the hybrid material was examined by X-ray diffraction and scanning electron microscope.In addition,gas sensing properties of hybrid materials were investigated.Experimental results showed that the structure of the tungsten oxide/titanium oxide(10% addition) exhibited monoclinic WO3 phase at 100℃ and gradually transformed into triclinic WO3 phase after heating at 300℃.The sensors prepared by tungsten oxide/titanium oxide(10% addition) powder also exhibited the best gas sensing performance.Under an environment of 3×10-6 NO2 gas,the sensitivity was 29.9 and 86.1 when tested at 200 and 150℃,respectively.更多还原