Cover Page September-2015-Advanced Materials Letters

Advanced Materials Letters

Volume 6, Issue 9, Pages 810-815, September 2015
About Cover


Influence Of Al3+ Substitution On Impedance Spectroscopy Studies Of Ni0.27Cu0.10Zn0.63AlxFe2-xO4 

M. Belal Hossen1*,  A.K.M. Akther Hossain2

1Department of Physics, Chittagong University of Engineering and Technology, Chittagong, Bangladesh

2Department of Physics, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh 

Adv. Mater. Lett., 2015, 6 (9), pp 810-815

DOI: 10.5185/amlett.2015.5854

Publication Date (Web): Sep 06, 2015

E-mail:belalcuet@gmail.com

Abstract

The influence of Al3+ substitution on the microstructure and impedance spectroscopy of Ni0.27Cu0.10Zn0.63AlxFe2-xO4 has been studied by scanning electron microscopy and impedance analyzer where the formation of the material in the spinel crystal structure was initially confirmed by X-ray structural analysis with room temperature data. The surface morphology indicates well defined grains separated by grain boundaries and with Al substitution average grain size decrease from 17 μm to 12 μm and zinc losses as well. The complex-plane impedance spectra indicate that the material can be represented by two semicircular arcs (its tendency) which corresponds to the bulk and the grain boundary resistance at high and low frequencies respectively. With Al substitution both grain and grain boundary resistance increases from 7.48 kΩ to 15.62 kΩ and 92.34 kΩ to 192.46 k respectively. Electric modulus spectra reflect the contributions from grain and grain boundary effects: the large resolved semicircle arc caused by the grain effect and the small poorly resolved semicircle arc was attributed to the grain boundary.

Keywords

Surface morphology, impedance spectroscopy, enhanced grain and grain boundary resistance, resolve relaxation.

Previous issues

Current Global Scenario of Electric Vehicles

Review on Detection of Phenol in Water 

Investigating the Machinability of Metallic Matrix Composites Reinforced by Carbon Nanotubes: A Review

Photocatalytic ZnO based PES Membranes for AOP Water Treatments under UV and Sunlight

Plasma Activated Water as a Source of Nitrogen for Algae Growth

Digital Light Processing (DLP) 3D Printing of Polyethylene Glycol (PEG) Biopolymer, Commercially available Ultra-High and Tough (UHT) Resin and Maghemite (γ-Fe2O3) Nanoparticles Mixture for Tissue Engineering Scaffold Application

Fabrication of Nanoparticle Embedded Polymeric Microbeads as an Efficient Drug Delivery System

Micro/Nanostructured Papers from Bagasse Pulp Reinforced by Nanofibrillated Cellulose from different Agro-Waste Sources

Structural, Optical and Magnetic Properties of Pristine, (Mn, Al) co-doped ZnO Nanocrystallites Synthesized via co-Precipitation Method

Nanosecond Laser Surface Patterning of Ti6Al4V Bio-alloy for Improved Biological Performance

Synthesis of Cu2O/Ag Composite Nanocubes with Promising Photoluminescence and Photodegradation Activity over Methylene Blue Dye

Locally available Clays of Bangladesh as a Replacement of imported Clays for Ceramic Industries 

Green Synthesis and Characterization of Silver Nanoparticles using Cassia auriculata Leaves Extract and Its Efficacy as A Potential Antibacterial and Cytotoxic Effect

Upcoming Congress

Knowledge Experience at Sea TM