Microstructure And Dielectric Relaxation Of BT And ST Doped Ba(Fe0.5Nb0.5)O3 ceramics For Sensor Applications
N. K. Singh1*, Pritam Kumar1, Chandra Prakash2
1University Department of Physics, V. K. S. University, Ara 802 301 Bihar, India
2Directorate of IE & IPR, DRDO, DRDO Bhawan, New Delhi 110011, India
Adv. Mater. Lett., 2012, Current Issue, 3 (3), pp 181-187
DOI: 10.5185/amlett.2012.3325
Publication Date (Web): Jun 10, 2012
Copyright © 2019 VBRI Press
E-mail: singh_nk_phy27@yahoo.com
Recently a new wave of interest has risen on complex perovskite structure due to their wide use in fabrication of multilayer ceramic capacitors, electrostrictive actuators, and electromechanical transducers. The polycrystalline ceramics of Ba(Fe0.5Nb0.5)O3 (BFN) and its solid solutions 0.89Ba(Fe0.5Nb0.5)O3-0.11BaTiO3 (BFN-BT11) and 0.89Ba(Fe0.5Nb0.5)O3-0.11SrTiO3 (BFN-ST11) were fabricated by a solid-state reaction Method. Processing parameters such as calcination temperature, sintering temperature and sintering durations were optimized to get best dielectric properties. It was found that the above ceramics sintered at 1250°C for 6 hours exhibited maximum density and uniform microstructure. X-ray diffraction studies of the compound showed the formation of single-phase monoclinic crystal structure at room temperature. Surface morphology of the compounds was studied by Scanning electron microscope (SEM). The effects of BaTiO3 and SrTiO3 substitution on the structure and on the electrical and ferroelectric properties of Ba(Fe0.5Nb0.5)O3 samples have been studied by performing x-ray diffraction and dielectric measurements. The electrical properties of the samples were investigated in a frequency range of 100 Hz - 1 MHz and temperature range of 30-350 °C using complex impedance spectroscopic technique. The frequency-dependent electrical data are also analyzed in the framework of conductivity and impedance formalisms.
Perovskite oxides, dielectric constant, electrical properties, scanning electron micrographs.
Cloud Medicine set to Revolutionize Doorstep Personalized Healthcare
Various surfactants for 0 – 3 dimensional nanocarbons: Separation, exfoliation and solubilization
Polypyrrole based biofunctional composite layer for bioelectrocatalytic device system
Innovative Graphene-PDMS sensors for aerospace applications
Effect of hot drawing process and carbonization temperature in electrochemical behavior of electrospun carbon nanofibers
Chemical Reactivity and Electronical Properties of Graphene and Reduced Graphene Oxide on Different Substrates
Laser Raman micro-spectroscopy as an effective non-destructive method of detection and identification of various sp2 carbon modifications in industry and in nature
Electrochemical promotion of ammonia synthesis with proton-conducting solid oxide fuel cells
Biomimetic surfaces with hierarchical structure using microsized texture and nanosized Cu particles for superhydrophobicity
Enhancement the properties of high and low-density polyethylene membranes by radiation grafting process
Synthesis of 9-Aminoacridine and its Application as an Anode Material for Aqueous Rechargeable Lithium–ion Batteries
Facile synthesis of novel tough and highly flexible biodegradable membranes for water microfiltration
Investigating the possibility of using acetic acid in place of HF in chromium-benzenedicarboxylates (MIL-53 and MIL-101) synthesis applicable for CO2 adsorption
Smart Healthcare pulls up Clouds for Virtual Medicine
Selecting the correct electromagnetic inspection technology
Influence of railway-track grinding on the track material condition and tribological behaviour
Micromechanical Fatigue Modelling of the Size Effect in Micro-Scale 316L Stainless Steel Specimens
Functionalization of Graphene and Reduced Graphene Oxide in Different Matrices
Effect of parasitic polytypes on ballistic electron transport in chemical vapor deposition grown 6H-SiC epitaxial layers
Photomemristive heterostructures based on two-dimensional crystals
Architecture - behaviour - properties relationship in Star-shaped MPA-PMMA and MPA-PS hyper-branched copolymers
Graphene and doped graphene: A comparative DFT study
Ag2CO3 / Magnetic reduced graphene oxide nanocomposite as advanced visible light photocatalytic hybrid materials for efficient degradation of azo dye
Optimization of acid hydrolysis process for the preparation cellulose nanofibrils
Alginate/k-carrageenan and alginate/gelatin composite hydrogel beads for controlled drug release of curcumin
Study of microstructure and mechanical properties of friction stir welded ferrite-martensite DP700 steel
Copyright ©2010-2019 VBRI Press
Full Article