【作者】 潘海波； 林德娟； 刘隆兴； 沈水发； 陈耐生； 黄金陵；

【Author】 PAN Hai-bo;LIN De-juan;LIU Long-xing;SHEN Shui-fa;CHEN Nai-sheng;HUANG Jin-ling Institute for Research on the Functional Materials, Fuzhou University Fuzhou, 350002, China

【机构】 福州大学功能材料研究所；

【摘要】 低工作温度、高灵敏、稳定、低成本的氧敏传感器是此类传感器普遍追求的目标,其应用领域十分广泛,迄今还没有商用氧敏传感器面市。本文利用Ti³⁺盐溶液为钛源,氧化法制备纳米粉体,制成厚膜型氧敏元件,经400℃,1h烧结后对纳米粉体进行TG-DTA、XRD、粒度分布、比表面等表征,对所制作的厚膜型元件进行气敏特性测量。获得了低温氧敏传感器,并就其低温氧敏机理进行了深入地探讨。更多还原

【Abstract】 Nanoscale TiO₂ powders doping with vanadium by oxidizing sol-gel process were prepared using TiCl₃ as asource matter. The influence of vanadium on the phase transition was studied. The changes in the crystal size, particlesize and specific surface area obtained at 400℃ were analyzed. The oxygen gas sensitivity in V⁵⁺ doped thick-filmssensor were carried out at 100 ppm. The results show that V^5- （18mol%） doped TiO₂ nanoscale powders was pure rutilephase and the sensor exhibits higher sensitivity （S=R₃ / R₀≥17.0） at lower work temperature 77℃. A new model forsensitivity in V⁵⁺ doped TiO₂ based gas sensor has been proposed.更多还原