GAO Zhao-fen1, ZENG Yu-ping2. Influence of Pd doping on tin oxide gas sensing properties[J]. 2007, (10): 32-34. DOI: 10.13873/j.1000-97872007.10.019.
Pd掺杂对SnO2气敏性能的影响
摘要
在气体传感器中金属Pd被广泛用作的催化剂
利用直流溅射和浆料涂覆的方法制备出SnO2气敏元件
在氧气氛中通过直流溅射对SnO2元件进行Pd掺杂
并对用不同制备方法所得元件的电导、灵敏度等进行比较。结果表明:Pd掺杂降低了元件的电导
并使得电导峰出现的位置从460℃转移到260℃和180℃
这和样品的制备方法有关。Pd掺杂有利于提高SnO2元件的灵敏度
特别在低温区(100
2
50℃)对不同气体的灵敏度有几十倍提高。
Abstract
Palladium is a widely used catalyst in gas sensors
SnO
2
gas sensors are prepared via DC-sputtering and slurry coating processing
respectively.The gas sensors are then Pd-doped by DC-sputtering in oxygen atmosphere.The conductivity
sensitivity of the gas sensors are investigated.The results indicate that Pd-doped reduces the conductivity of gas sensor and leads to the peak value of the conductivity shift from 460 ℃ to 260 ℃ and 180 ℃
respectively
depending on the SnO
2
film preparing method.The sensitivity of the Pd-doped SnO
2
gas sensor is much higher.Specially
the sensitivity at the temperature of 100
2
50 ℃ is several decade times than that of the gas sensor without Pd doping.
关键词
Keywords
references
Synthesis of SnO 2 /Pd composite films by PVD route for a liquid petroleum gas sensor [J] . S Gupta,R.K Roy,M.Pal Chowdhury,A.K Pal. Vacuum . 2004 (2)
Oxide Semiconductor Gas Sensors [J] . Noboru Yamazoe,Go Sakai,Kengo Shimanoe. Catalysis Surveys from Asia . 2003 (1)