bullet Sensors & Transducers Journal

    (ISSN 1726- 5479)

205.767

2008 e-Impact Factor

25 Top Downloaded Articles

Best Selling Articles 2012

Journal Subscription 2013

Editorial Calendar 2013

Submit an Article

Editorial Board

Current Issue

Sensors & Transducers journal's cover

Sensors & Transducers Journal 2011

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 2011

 

 

 

Vol. 149, No. 2, February 2013, pp. 6-12

 

Bullet

 

Effect of Annealing Temperature on Ag-NaCl/TiO2-Ag and Ag-NaCl/Al2O3–Ag Capacitive and Resistive Humidity Sensors
 

1 Sheyla JIMÉNEZ, 1 Luciana SCARIONI and 2 Kelim VANO

1 Thin Film Laboratory, Department of Physics, Faculty of Science and Technology

University of Carabobo, Naguanagua, 2001 Carabobo, Venezuela

2 Department of Analytical Chemistry, Institute of Inorganic Chemistry, Faculty of Natural Sciences, Leibniz University Hanover, Callinstrasse 1, 30167 Hanover, Germany

Tel.: +58 6004000, fax: +58 0241 8678243,

E-mail: jsheyla@yahoo.com

 

Received: 5 November 2012   /Accepted: 14 February 2013   /Published: 28 February 2013

Digital Sensors and Sensor Sysstems

 

Abstract: Present paper reports the applications of NaCl/TiO2 and NaCl/Al2O3 as capacitive and resistive humidity sensors. The pellets are prepared with the addition of TiO2 and Al203 of different molar ratios (0.10, 0.50 and 0.80) to NaCl and annealed at 60, 80, 100 and 120 °C for 4 days. After of annealing, the pellets were exposed to humidity under controlled condition. Variations in resistance and capacitance with the relative humidity were recorded. Results show that the capacitance and resistance increase with the annealing temperature. From the Scanning Electron Microscopic studies, it is observed that as annealing temperature increases the porosity of samples increases and particle size decreases with concentration of TiO2 and Al2O3. XRD pattern shows that addition of TiO2 and Al2O3 to NaCl affects crystallite size. Results show that NaCl/TiO2 has a better scope for developed resistive sensors and NaCl/Al2O3 for capacitive sensors.

 

Keywords: Resistance, Capacitance, Humidity sensors, Pellets

 

Acrobat reader logo Click <here> or title of paper to download the full pages article in pdf format

 

 

Read free articles about Humidity and Chemical Sensors

 

 

 

 

 


1999 - 2018 Copyright ©, International Frequency Sensor Association (IFSA). All Rights Reserved.


Home - News - Links - Archives - Tools - Voltage-to-Frequency Converters - Standardization - Patents - Marketplace - Projects - Wish List - e-Shop - Sensor Jobs - Membership - Videos - Publishing - Site Map - Subscribe - Search

 Members Area -Sensors Portal -Training Courses - S&T Digest - For advertisers - Bookstore - Forums - Polls - Submit Press Release - Submit White Paper - Testimonies - Twitter - Facebook - LinkedIn