the effects of two thick film deposition methods on tin dioxide gas sensor performance两个厚膜沉积的影响对二氧化锡气体传感器性能的方法.pdf

Sensors 2009, 9, 6853-6868; doi:10.3390/ OPEN ACCESS sensors ISSN 1424-8220 /journal/sensors Article The Effects of Two Thick Film Deposition Methods on Tin Dioxide Gas Sensor Performance Smitesh D. Bakrania 1,* and Margaret S. Wooldridge 2 1 Department of Mechanical Engineering, Rowan University / 201 Mullica Hill Road, Glassboro, NJ 08028, USA 2 Department of Mechanical Engineering, University of Michigan / 2350 Hayward Street, Ann Arbor, MI 48109, USA; E-Mail: mswool@ * Author to whom correspondence should be addressed; E-Mail: bakrania@; Tel.: +1-856-256-5345; Fax: +1-856-256-5241. Received: 30 June 2009; in revised form: 26 August 2009 / Accepted: 27 August 2009 / Published: 31 August 2009 Abstract: This work demonstrates the variability in performance between SnO thick film 2 gas sensors prepared using two types of film deposition methods. SnO2 powders were deposited on sensor platforms with and without the use of binders. Three commonly utilized binder recipes were investigated, and a new binder-less deposition procedure was developed and characterized. The binder recipes yielded sensors with poor film uniformity and poor structural integrity, compared to the binder-less deposition method. Sensor performance at a fixed operating temperature of 330 ºC for the different film deposition methods was evaluated by exposure to 500