TITLE:
Structural and Dielectric Properties of (Bi2O3Fe2O3)0.4(Nb2O5)0.6 for Different Sintering Temperature
AUTHORS:
Sadia Tasnim Mowri, M. A. Gafur, Quazi Delwar Hossain, Aninda Nafis Ahmed, Muhammad Shahriar Bashar
KEYWORDS:
XRD, Niobium, SEM, Dielectric Constant, Dielectric Loss, Loss Tangent, Bismuth Ferrite, Resistivity
JOURNAL NAME:
Materials Sciences and Applications,
Vol.7 No.8,
August
18,
2016
ABSTRACT: In
this research work, (Bi2O3Fe2O3)0.4(Nb2O5)0.6 was made by the solid state reaction method. Samples were sintered at four
different temperatures (850°C, 925°C, 1000°C and 1150°C) to study the effect of
sintering temperature on the various properties of the samples. X-ray
diffraction analysis confirmed that single phase Bi1.721δ0.089Fe1.056Nb1.134O7 was found when sintering temperature increased.
At the same time, larger grain size was
found when sintering temperature increased. From variation of dielectric
loss with respect to frequency, a small peak was found when sample was sintered
at higher temperature (1150°C). Dielectric constant of the sample decreases
with the increase of frequency for all the samples. With the variation of
temperature, DC resistivity of the samples showed that resistivity decreases
with the increase of measuring temperature which indicates semiconducting nature.