Synthesis Characterization and Humidity Sensing Properties of Sol-gel Derived Novel Nanomaterials of LaSr^sub x^Fe^sub 1-x^O^sub 3-[delta]

LaSr^sub x^Fe^sub 1-x^O^sub 3-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...

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Published in:Sensors & transducers 2012-11, Vol.146 (11), p.8
Main Authors: Teresita, Mary V, Jeseentharani, V, Josephine, Avila B, Jeyaraj, B, Antony, Arul S
Format: Article
Language:English
Subjects:
Aqueous solutions
Nanomaterials
Nitrates
Quality control
Sensors
Studies
Online Access:Get full text
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Summary:LaSr^sub x^Fe^sub 1-x^O^sub 3-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 2.606x10^sup 4^ and LSF-1 shows the lowest sensitivity factor 0.426x10^sup 2^. 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. Copyright © 2012 IFSA. [PUBLICATION ABSTRACT]
ISSN:2306-8515
1726-5479