bullet Sensors & Transducers Journal

    (ISSN 1726- 5479)

156.504

2007 e-Impact Factor

25 Top Downloaded Articles

Journal Subscription 2008

Editorial Calendar 2008

Submit an Article

Editorial Board

Current Issue

Sensors & Transducers journal's cover

 

Sensors & Transducers Journal 2007

2000-2002 S&T e-Digest Contents

2003 S&T e-Digest Contents

2004 S&T e-Digest Contents

2005 S&T e-Digest Contents

2006 S&T e-Digest Contents

 

Best Articles 2007

 

 

Vol. 92, Issue 5, May 2008, pp. 24-31

 

 

Bullet

Study of Room Temperature H2S Gas Sensing Behavior of CuO-modified BSST Thick Film Resistors

H. M. Baviskar, V. V. Deo, D. R. Patil, L. A. Patil*

Materials Research Lab, P.G. Dept. of Physics, Pratap College, Amalner-425 401, India

* Corresponding author. Tel.: +91-02587-224226

E-mail address: lapresearch@rediffmail.com

 

 

Received: 27 March 2008   /Accepted: 20 May 2008   /Published: 26 May 2008

 

Abstract: Thick films of (Ba0.1Sr0.9)(Sn0.5Ti0.5)O3 referred as BSST, were prepared by screen-printing technique. The preparation, characterization and gas sensing properties of pure and CuO-BSST mixed oxide semiconductors have been investigated. The mixed oxides were obtained by dipping the pure BSST thick films into 0.01 M aqueous solution of CuCl2, for different intervals of time. Pure BSST was observed to be less sensitive to H2S gas. However, mixed oxides of CuO and BSST were observed to be highly sensitive to H2S gas. Upon exposure to H2S gas, the barrier height of CuO-BSST intergranular regions decreases markedly due to the chemical transformation of CuO into well conducting CuS leading to a drastic decrease in resistance. The crucial gas response was found to H2S gas at room temperature and no cross sensitivity was observed to other hazardous and polluting gases. The effects of microstructure and doping concentration on the gas response, selectivity, response and recovery of the sensor in the presence of H2S gas were studied and discussed.

 

Keywords: BSST, CuO, Mixed oxide, cross sensitivity, Thick film resistor and H2S gas sensor.

 

 Acrobat reader logo Click <here> or title of paper to download the full pages article (488 K)

 

 

 

Read more about gas sensors

 


1999 - 2008 Copyright , International Frequency Sensor Association (IFSA). All Rights Reserved.


Home - News - Links - Archives - Tools - Standardization - Patents - Marketplace - Projects - Wish List - Subscribe - Search - e-Shop - Membership

 Members Area -Sensors Portal -Training Courses - S&T Digest - For advertisers - Bookstore - Forums - Polls - Sensor Jobs - Site Map