Cover Page May-2017-Advanced Materials Letters

Advanced Materials Letters

Volume 8, Issue 5, Pages 605-613, May 2017
About Cover


Effect of heating rate on microstructure and electrical properties of microwave sintered CaCu3Ti4O12 ceramics

Sandeep Kumar1, Neetu  Ahlawat1*, Navneet Ahlawat2

1Department of Applied Physics, Guru Jambheshwar University of Science and Technology, Hisar, Haryana 125001, India

2Matu Ram Institute of Engineering and Management, Rohtak, Haryana 124001, India

Adv. Mater. Lett., 2017, 8 (5), pp 605-613

DOI: 10.5185/amlett.2017.6398

Publication Date (Web): Apr 04, 2017

E-mail: neetugju@yahoo.co.in

Abstract

In the present work, the results of microstructure, dielectric and ferroelectric investigation of microwave sintered CaCu3Ti4O12 (CCTO) ceramic with different heating rate are presented. Scanning electron micrographs revealed that grain size decreases from 1.167 µm to 0.744 µm with increased heating rate from 10ºC/min. to 50ºC/min which can be explained on the basis of phenomenological kinetic equation for grain growth. Dielectric response also found to influence by heating rate. The CCTO ceramic sintered with 50 ºC/min. exhibited highest dielectric constant (ɛr~3915) with nominal losses (0.10) at room temperature in broad frequency range from 102Hz-105Hz. Cole-Cole plots revealed the change in grain boundary resistivity mainly caused by the oxygen vacancy activities and affected by varying sintering heating rate. An anomaly observed for 50 ºC/min heating rate due to trapping of oxygen at grain boundaries. The remnant polarization and coercive field for CCTO ceramic sintered with 50ºC/min were 0.1 µC /cm2 and 1.477 kV /cm respectively. Remnant polarization found to decrease while the coercive field increases with increasing heating rate applying these are micro-structural dependent.    

Keywords

CaCu3Ti4O12, dielectric, ferroelectric, P-E loop, microwave, heating rate.

Current Issue

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


Previous issues

Wearable Healthcare Devices

Nano-Graphene and Its Derivatives for Fabrication of Flexible Electronic Devices: A Quick Review

Natural Fibers as Viable Sources for the Development of Structural, Semi-Structural, and Technological Materials – A Review

Geometrical Characterization of Wire-and-Arc Additive Manufactured Steel Element

Plasma Activated Water Generation and its Application in Agriculture

Development of Advanced Electrode Materials on Porous Silicon for Micropower Formic Acid-Oxygen Fuel Cells 

Water Management within Tragacanth gum-g-polyitaconic Acid Hydrogels

Synthesis and Characterization of Humic Acid-coated Fe3O4 Nanoparticles for Methylene Blue Adsorption Activity

Synthesis and characterization of thermally stable flame retardant thermoplastic polyphosphazenes

Synthesis of Rod-coil Molecules bearing Oligo-Phenylene Vinylene Motifs: Effect of PEO Chain Lengths on the Evolution of Nanostructures Morphology and their Photophysical Properties

Dielectric Properties of Cu based Polymeric Composites in X-band of Microwave Frequency

Critical Association Concentration of Dansyl-Poly (acrylic acid) Synthetized by Redox Polymerization Followed by an Esterification in Aqueous Solution: Spectrophotometric and Tensiometric Studies

Influence of Iron Doping on Structural and Optical Properties of Nickel Oxide Nanoparticles

Upcoming Congress

Knowledge Experience at Sea TM