bullet Sensors & Transducers Journal

    (ISSN 1726- 5479)


2008 e-Impact Factor

25 Top Downloaded Articles

Journal Subscription 2012

Editorial Calendar 2012

Submit an Article

Editorial Board

Current Issue

Sensors & Transducers journal's cover

Sensors & Transducers Journal 2010

Sensors & Transducers Journal 2009

Sensors & Transducers Journal 2008

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 2010




Vol. 135, Issue 12, December 2011, pp.98-109




Morphological, Humidity and Liquefied Petroleum Gas (LPG) Sensing Investigations on Tantalum Oxide


1 Ritesh KUMAR, 1, 2* B. C. YADAV, 1 Tripti SHUKLA, 1 Rajeev SINGH and 3 Shyam SINGH

1 Nanomaterials and Sensors Research Laboratory

Department of Physics, Lucknow University, Lucknow, U. P., India

2 Department of Applied Physics, Babasaheb Bhimrao Ambedkar University, Lucknow, U.P., India

3 R. R. Institute of Modern Technology, Lucknow, U.P., India

Tel.: +91-522-2998891, mob.: +919450094590

* E-mail: balchandra_yadav@rediffmail.com



Received: 16 September 2011   /Accepted: 16 December 2011   /Published: 28 December 2011

Handbook of Laboaratory Measurements book


Abstract: This paper reports the morphological, humidity and Liquefied Petroleum Gas (LPG) sensing properties of Tantalum Oxide. The pellet of sensing material was prepared by hydraulic pressing machine at a pressure of 616 MPa at room temperature. It was annealed at 200, 400, 600 and 800 C successively for 3 h and after each step of annealing; the sensing material was investigated using Scanning Electron Microscope. Minimum crystallite size, calculated from Debye-Scherrer formula was found to be 20 nm. Effects of annealing on surface morphology and electrical resistivity of sensing material have been also deliberated. It has been observed that with the increase in percentage relative humidity (%RH) inside the chamber, there is corresponding decrease in the resistance values of pellet for the range from 25 to 95 %RH. Average sensitivity of the sensor is found 27 MΩ/%RH and in case of LPG sensing the maximum average sensitivity is 7. Reproducibility, hysteresis and ageing effect have been also investigated.


Keywords: Humidity, LPG, Resistance, Sensitivity, Annealing, Morphology, SEM and XRD


Acrobat reader logo Click <here> or title of paper to download the full pages article (4.33 Mb)



Read more about Humidity, Gas and Chemical Sensors






1999 - 2011 Copyright , International Frequency Sensor Association (IFSA). All Rights Reserved.

Home - News - Links - Archives - Tools - Standardization - Patents - Marketplace - Projects - Wish List - Subscribe - Membership - IFSA Publishing - Submit Press Release - Submit White Paper - Facebook - Twitter - LinkedIn

 Members Area -Sensors Portal - Voltage-to-Frequency Converters - Training Courses - S&T Digest - For advertisers - Bookstore - Forums - Polls - Sensor Jobs - e-Shop - Site Map - Video - Search