Nio Modification Using Zr4+ And Ca2+ For Dielectric Improvement

In this research, the effect of Zirconium ions (Zr4+) and Calcium ions (Ca2+) dopant on NiO was investigated. The electroceramic of Ni(1-x)ZrxO, Ni(1-x)CaxO and Ni0.95Zr0.02Ca0.01 was prepared by using solid state reaction method. Three main raw materials of NiO, ZrO2 and CaO were mixed for 24 hours...

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Main Author:	Syed Salim, Sharifah Aishah
Format:	Thesis
Language:	English
Published:	2013
Subjects:	TA404 Composite materials
Online Access:	http://eprints.usm.my/36879/1/SHARIFAH_AISHAH_BINTI_SYED_SALIM_24_Pages.pdf
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spelling	my-usm-ep.368792019-04-12T05:26:19Z Nio Modification Using Zr4+ And Ca2+ For Dielectric Improvement 2013 Syed Salim, Sharifah Aishah TA404 Composite materials In this research, the effect of Zirconium ions (Zr4+) and Calcium ions (Ca2+) dopant on NiO was investigated. The electroceramic of Ni(1-x)ZrxO, Ni(1-x)CaxO and Ni0.95Zr0.02Ca0.01 was prepared by using solid state reaction method. Three main raw materials of NiO, ZrO2 and CaO were mixed for 24 hours, then were calcined at 1000ºC. Ni(1-x)ZrxO and Ni(1-x)CaxO was sintered at 1280°C for 10 hours and 1250°C for 4 hours, respectively. Ni0.95Zr0.02Ca0.01 was sintered at 1200ºC, 1250ºC and 1300ºC for 5 hours. The 1250ºC for 5 hours was identified as optimum sintering profile for Ni0.95Zr0.02Ca0.01 formation. XRD analysis on sintered sample showed the single phase formation of Ni(1-x)ZrxO, Ni(1-x)CaxO and Ni0.95Zr0.02Ca0.01. FESEM observation on the Ni(1-x)ZrxO showed that grain size are bigger with increasing amount of dopant and Ni(1-x)CaxO shows that grain size are getting larger with increasing amount of dopant. Meanwhile the grain size of Ni0.95Zr0.02Ca0.01 are larger with the increasing sintering temperature. The densification of Ni(1-x)ZrxO, Ni(1-x)CaxO and Ni0.95Zr0.02Ca0.01 was improved using Zr4+ and Ca2+ doping and the porosity decrease at higher dopant concentration. The dielectric behavior of Ni(1-x)ZrxO with x = 0.02 mole % Zr4+ exhibited highest dielectric constant (700) with moderate dielectric loss (0.16). Meanwhile, the dielectric behavior of Ni(1-x)CaxO samples show that the sample doped with x = 0.01 mole % Ca2+ obtained the lowest dielectric loss (0.05) but moderate in dielectric constant (123), measured at 1 MHz. The combination of this two optimum dopant content, Zr4+ = 0.02 mole % and xix Ca2+ = 0.01 mole %, has been applied to produce Ni0.95Zr0.02Ca0.01. The dielectric behavior of Ni0.95Zr0.02Ca0.01 posses the highest dielectric constant (727) and lowest dielectric loss (0.04). 2013 Thesis http://eprints.usm.my/36879/ http://eprints.usm.my/36879/1/SHARIFAH_AISHAH_BINTI_SYED_SALIM_24_Pages.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Bahan dan Sumber Mineral
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	TA404 Composite materials
spellingShingle	TA404 Composite materials Syed Salim, Sharifah Aishah Nio Modification Using Zr4+ And Ca2+ For Dielectric Improvement
description	In this research, the effect of Zirconium ions (Zr4+) and Calcium ions (Ca2+) dopant on NiO was investigated. The electroceramic of Ni(1-x)ZrxO, Ni(1-x)CaxO and Ni0.95Zr0.02Ca0.01 was prepared by using solid state reaction method. Three main raw materials of NiO, ZrO2 and CaO were mixed for 24 hours, then were calcined at 1000ºC. Ni(1-x)ZrxO and Ni(1-x)CaxO was sintered at 1280°C for 10 hours and 1250°C for 4 hours, respectively. Ni0.95Zr0.02Ca0.01 was sintered at 1200ºC, 1250ºC and 1300ºC for 5 hours. The 1250ºC for 5 hours was identified as optimum sintering profile for Ni0.95Zr0.02Ca0.01 formation. XRD analysis on sintered sample showed the single phase formation of Ni(1-x)ZrxO, Ni(1-x)CaxO and Ni0.95Zr0.02Ca0.01. FESEM observation on the Ni(1-x)ZrxO showed that grain size are bigger with increasing amount of dopant and Ni(1-x)CaxO shows that grain size are getting larger with increasing amount of dopant. Meanwhile the grain size of Ni0.95Zr0.02Ca0.01 are larger with the increasing sintering temperature. The densification of Ni(1-x)ZrxO, Ni(1-x)CaxO and Ni0.95Zr0.02Ca0.01 was improved using Zr4+ and Ca2+ doping and the porosity decrease at higher dopant concentration. The dielectric behavior of Ni(1-x)ZrxO with x = 0.02 mole % Zr4+ exhibited highest dielectric constant (700) with moderate dielectric loss (0.16). Meanwhile, the dielectric behavior of Ni(1-x)CaxO samples show that the sample doped with x = 0.01 mole % Ca2+ obtained the lowest dielectric loss (0.05) but moderate in dielectric constant (123), measured at 1 MHz. The combination of this two optimum dopant content, Zr4+ = 0.02 mole % and xix Ca2+ = 0.01 mole %, has been applied to produce Ni0.95Zr0.02Ca0.01. The dielectric behavior of Ni0.95Zr0.02Ca0.01 posses the highest dielectric constant (727) and lowest dielectric loss (0.04).
format	Thesis
qualification_level	Master's degree
author	Syed Salim, Sharifah Aishah
author_facet	Syed Salim, Sharifah Aishah
author_sort	Syed Salim, Sharifah Aishah
title	Nio Modification Using Zr4+ And Ca2+ For Dielectric Improvement
title_short	Nio Modification Using Zr4+ And Ca2+ For Dielectric Improvement
title_full	Nio Modification Using Zr4+ And Ca2+ For Dielectric Improvement
title_fullStr	Nio Modification Using Zr4+ And Ca2+ For Dielectric Improvement
title_full_unstemmed	Nio Modification Using Zr4+ And Ca2+ For Dielectric Improvement
title_sort	nio modification using zr4+ and ca2+ for dielectric improvement
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Bahan dan Sumber Mineral
publishDate	2013
url	http://eprints.usm.my/36879/1/SHARIFAH_AISHAH_BINTI_SYED_SALIM_24_Pages.pdf
_version_	1747820649969090560

Nio Modification Using Zr4+ And Ca2+ For Dielectric Improvement

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