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conferenceseries
.com
Volume 5, Issue 6 (Suppl)
J Mat. Sci.
ISSN: 2321-6212
Advanced Materials 2017
October 26-28, 2017
OCTOBER 26-28, 2017 OSAKA, JAPAN
13
TH
INTERNATIONAL CONFERENCE ON
Advanced Materials and Nanotechnology
Electrical investigations of PbTiO3 ceramics with Pb/Ti contents fabricated through solid state
sintering reaction method
Nasira Sareecha
Islamia University of Bahawalpur, Pakistan
P
olycrystalline PbTiO
3
ceramics were fabricated through solid state sintering reaction method at Pb/Ti molar ratio
of x=1.00, 0.98 and 0.94. Keeping the technological position of PbTiO
3
ceramics for variety of applications; electrical
investigations of crack free sintered PbTiO
3
ceramics were struggled under varying processing parameters in the wide spread
spectrum of temperature from 40-700 °C at 1k Hz frequency. Stoichiometry and sintering regime strongly influenced the
phase transition (TC) of PbTiO
3
ceramics; compositions-1.00 and 0.98 showed sharp phase transition predominantly at 490
o
C.
Impedance spectroscopy revealed dielectric anomalies with a relaxor like behavior at higher temperatures. The temperature
dependence of alternative current conductivity (σac) confirmed the presence of ferroelectric to para-electric phase transition.
At room temperature, resistivity (ρ25) increased with increasing titanium contents. All specimens showed semiconductor
behavior with Negative Temperature Coefficient of Resistivity (NTCR) characteristics; expanding drift mobility, µd through
increasing temperature concerted the rise in conductivity. The bulk conductivity followed the Arrhenius law with E
a
=2.3265-
2.6269, 0.8302-0.7246 and 1.7665-0.3889 eV which can be attributed to the ionic conduction governed by V''
Pb
, V'O and V''O
vacancies. Dielectric studies at PbTiO
3
ceramics fabricated with optimal 0.98 compositions have potential application for high
temperature applications.
nsareecha@hotmail.comJ Mat. Sci. 2017, 5:6
DOI: 10.4172/2321-6212-C1-009