Author(s)

Sadia Tasnim Mowri^1*, M. A. Gafur², Quazi Delwar Hossain¹, Aninda Nafis Ahmed², Muhammad Shahriar Bashar³

¹Electrical and Electronic Engineering Department, Chittagong University of Engineering and Technology, Chittagong, Bangladesh.
²Pilot Plant & Process Development Centre, Bangladesh Council of Scientific and Industrial Research, Dhaka, Bangladesh.
³Institute of Fuel Research & Development, Bangladesh Council of Scientific and Industrial Research, Dhaka, Bangladesh.

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 Bi_1.721δ_0.089Fe_1.056Nb_1.134O₇ 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.

XRD, Niobium, SEM, Dielectric Constant, Dielectric Loss, Loss Tangent, Bismuth Ferrite, Resistivity

Mowri, S. , Gafur, M. , Hossain, Q. , Ahmed, A. and Bashar, M. (2016) Structural and Dielectric Properties of (Bi₂O₃Fe₂O₃)_0.4(Nb₂O₅)_0.6 for Different Sintering Temperature. Materials Sciences and Applications, 7, 421-429. doi: 10.4236/msa.2016.78038.