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Vol. 146, No. 11, November 2012, pp. 8-16

 

Bullet

 

Synthesis Characterization and Humidity Sensing Properties of Sol-gel Derived Novel Nanomaterials of LaSrxFe1-xO3-δ
 

1 Mary Teresita V., 2 Jeseentharani V., 1 Avila Josephine B.,

2 Jeyaraj B., 3 Arul Antony S.

1Department of Chemistry, Stella Maris College, Chennai-600 086, India

3 PG & Research Department of Chemistry, Presidency College, Chennai-600 005, India

2 Department of Chemistry, Loyola Institute of Frontier Energy (LIFE),

Loyola College, Chennai - 600 034, India

1 Tel: +91 9840224515

E-mail: teres_cvd@yahoo.co.in

 

 

Received: 10 September 2012   /Accepted: 23 November 2012   /Published: 30 November 2012

Digital Sensors and Sensor Sysstems

 

Abstract: LaSrxFe1-xO3-δ (x=0, 0.2, 0.4, 0.6, 0.8, 1) were prepared by sol-gel method. The compounds were sintered at 700 C for 6 hrs and were subjected to DC resistance measurements at RH 5-98 % and temperature dependent studies. The change in surface conductivity as a function of applied field was measured using picoammeter (Keithely-6485). Among the various mole ratios of compounds LSF-4 shows the highest sensitivity factor of 2.606104 and LSF-1 shows the lowest sensitivity factor 0.426102. Response and recovery times were measured. The compounds were characterized by X-ray diffraction, FT-IR and scanning electron microscopy (SEM) studies were employed to study the structural phases, vibrational frequencies, surface morphology of the highest humidity sensing compounds.

 

Keywords: Mixed metal oxides, Sensors, Perovskites, Ferrite, Humidity

 

 

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