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Synthesis and characterization of high dielectric constant material based on Er-doped BaTiO3 for capacitor applications

Master of Science in Electronic Engineering

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Bibliographic Details
Main Author: Fatin Adila, Ismail
Other Authors: Rozana Aina, Maulat Osman, Dr.
Format: Thesis
Language:English
Published: Universiti Malaysia Perlis (UniMAP) 2018
Subjects:
Energy storage
Miniature electronic equipment
Capacitors
Dielectric devices
Barium metatitanate
Online Access:http://dspace.unimap.edu.my:80/xmlui/handle/123456789/77424
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spelling my.unimap-774242022-12-07T01:19:45Z Synthesis and characterization of high dielectric constant material based on Er-doped BaTiO3 for capacitor applications Fatin Adila, Ismail Rozana Aina, Maulat Osman, Dr. Energy storage Miniature electronic equipment Capacitors Dielectric devices Barium metatitanate Master of Science in Electronic Engineering High dielectric constant material becomes an important parameter to be used as capacitor for storage in most electronic devices due to miniaturization trend of smart devices and electronic gadgets. BaTiO3 was used in this study as it was reported to have a high dielectric constant (εr= 4000-10000) at Curie temperature (TC) around 110˚C. Furthermore, it was reported that by doping Erbium (Er) into BaTiO3, it can improve the dielectric properties of BaTiO3. BaTiO3 and Er-doped BaTiO3 with composition of Ba1-xErxTiO3 in the range of (0 ≤ x ≤ 0.01) have been synthesized via conventional solid state reaction method. The characterizations of these compositions were made using X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM) analysis and Impedance Analyzer analysis. XRD analysis shows that BaTiO3 and Er-doped BaTiO3 has phase pure after heating at 1400˚C. Both BaTiO3 and Er-doped BaTiO3 exhibit tetragonal structure with space group of P4mm. Solid solution limit of Er-doped BaTiO3 composition is beyond x=0.01. For structural analysis, Rietveld refinement analysis were done on BaTiO3 for 5 models (A, B, C, D and E) to find the suitable atomic position with low 2 value to be used as standard model to refine other Er-doped BaTiO3 samples. Model C is the best model with low 2 value of 3.808. With Rietveld refinement analysis, study on incorporation of Er into the A-site and B-site of perovskite ABO3 structure was done. The result indicates that Er can be at both side either A or B site because of the 2 value that is very similar. For microstructural analysis, SEM was used to study the grain size effect by doping Er into BaTiO3. The smallest grain size for Ba1-xErxTiO3 was 3.76 m at x=0.0075. For electrical properties, the composition of Ba1-xErxTiO3 at x=0.0075 has the highest dielectric constant value, εr= ~ 6500 as compared to pure BaTiO3 with dielectric constant value, εr= ~ 5200. Instead of that, the sample at x=0.0075 has low dielectric loss with value less than 0.1. The highest capacitance value for x=0.0075 at the highest dielectric constant value is C= ~4 x 10-9 Fcm-1 with total conductivity, ζ= 4 x 10-7Scm-1. The Capacitance-Voltage (C-V) characteristic were measured from 0 to 30 V and all the samples show a high capacitance by increasing the voltage up to 30 V with no signal of breakdown region. The sample with the highest dielectric constant, low loss and good C-V characteristic is the sample with x= 0.0075. 2018 2022-12-07T01:19:45Z 2022-12-07T01:19:45Z Thesis http://dspace.unimap.edu.my:80/xmlui/handle/123456789/77424 en Universiti Malaysia Perlis (UniMAP) Universiti Malaysia Perlis (UniMAP) School of Microelectronic Engineering
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Energy storage
Miniature electronic equipment
Capacitors
Dielectric devices
Barium metatitanate
spellingShingle Energy storage
Miniature electronic equipment
Capacitors
Dielectric devices
Barium metatitanate
Fatin Adila, Ismail
Synthesis and characterization of high dielectric constant material based on Er-doped BaTiO3 for capacitor applications
description Master of Science in Electronic Engineering
author2 Rozana Aina, Maulat Osman, Dr.
author_facet Rozana Aina, Maulat Osman, Dr.
Fatin Adila, Ismail
format Thesis
author Fatin Adila, Ismail
author_sort Fatin Adila, Ismail
title Synthesis and characterization of high dielectric constant material based on Er-doped BaTiO3 for capacitor applications
title_short Synthesis and characterization of high dielectric constant material based on Er-doped BaTiO3 for capacitor applications
title_full Synthesis and characterization of high dielectric constant material based on Er-doped BaTiO3 for capacitor applications
title_fullStr Synthesis and characterization of high dielectric constant material based on Er-doped BaTiO3 for capacitor applications
title_full_unstemmed Synthesis and characterization of high dielectric constant material based on Er-doped BaTiO3 for capacitor applications
title_sort synthesis and characterization of high dielectric constant material based on er-doped batio3 for capacitor applications
publisher Universiti Malaysia Perlis (UniMAP)
publishDate 2018
url http://dspace.unimap.edu.my:80/xmlui/handle/123456789/77424
_version_ 1753973028549558272
score 13.211869

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