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High frequency response to the impedance complex properties of Nb-doped CaCu3Ti4O12 electroceramics

Impedance analyses was performed on undoped and Nb-doped CaCu3Ti4O12 (CaCu3Ti4−xNbxO12+x/2; x = 0, 0.01, 0.03, 0.05, 0.1) to investigate their electrical properties. The pellet samples were prepared using the solid state reaction method. Silver electrode was deposited on both pellets’ surfaces for e...

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Main Authors: Sulaiman, Muhammad Azwadi, Hutagalung, Sabar Derita, Mohamed, Julie Juliewatty, Ahmad, Zainal Arifin, Ain, Mohd Fadzil, Ismail, Bakar
Format: Article
Published: Elsevier B.V. 2011
Subjects:
Q Science
Online Access:http://eprints.utm.my/id/eprint/29160/
http://dx.doi.org/10.1016/j.jallcom.2011.02.145
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spelling my.utm.291602019-03-17T03:03:11Z http://eprints.utm.my/id/eprint/29160/ High frequency response to the impedance complex properties of Nb-doped CaCu3Ti4O12 electroceramics Sulaiman, Muhammad Azwadi Hutagalung, Sabar Derita Mohamed, Julie Juliewatty Ahmad, Zainal Arifin Ain, Mohd Fadzil Ismail, Bakar Q Science Impedance analyses was performed on undoped and Nb-doped CaCu3Ti4O12 (CaCu3Ti4−xNbxO12+x/2; x = 0, 0.01, 0.03, 0.05, 0.1) to investigate their electrical properties. The pellet samples were prepared using the solid state reaction method. Silver electrode was deposited on both pellets’ surfaces for electrical measurement. The thermally etched samples showed tiny bumped domains within the grains. The existence of both domain and grain boundaries are believed to strongly influence the dielectric constant of CaCu3Ti4O12 (CCTO). Undoped CCTO showed two arcs of impedance complex plane while Nb-doped samples have three arcs. Each arc represents the constituent elements of the CCTO. The highest frequency arc is evidence that CCTO consists of conductive domains which measure about 1 Ω and are insulated by two types of barriers, i.e. domain boundary and grain boundary. Elsevier B.V. 2011-05 Article PeerReviewed Sulaiman, Muhammad Azwadi and Hutagalung, Sabar Derita and Mohamed, Julie Juliewatty and Ahmad, Zainal Arifin and Ain, Mohd Fadzil and Ismail, Bakar (2011) High frequency response to the impedance complex properties of Nb-doped CaCu3Ti4O12 electroceramics. Journal of Alloys and Compounds, 509 (18). pp. 5701-5707. ISSN 0925-8388 http://dx.doi.org/10.1016/j.jallcom.2011.02.145 DOI:10.1016/j.jallcom.2011.02.145
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic Q Science
spellingShingle Q Science
Sulaiman, Muhammad Azwadi
Hutagalung, Sabar Derita
Mohamed, Julie Juliewatty
Ahmad, Zainal Arifin
Ain, Mohd Fadzil
Ismail, Bakar
High frequency response to the impedance complex properties of Nb-doped CaCu3Ti4O12 electroceramics
description Impedance analyses was performed on undoped and Nb-doped CaCu3Ti4O12 (CaCu3Ti4−xNbxO12+x/2; x = 0, 0.01, 0.03, 0.05, 0.1) to investigate their electrical properties. The pellet samples were prepared using the solid state reaction method. Silver electrode was deposited on both pellets’ surfaces for electrical measurement. The thermally etched samples showed tiny bumped domains within the grains. The existence of both domain and grain boundaries are believed to strongly influence the dielectric constant of CaCu3Ti4O12 (CCTO). Undoped CCTO showed two arcs of impedance complex plane while Nb-doped samples have three arcs. Each arc represents the constituent elements of the CCTO. The highest frequency arc is evidence that CCTO consists of conductive domains which measure about 1 Ω and are insulated by two types of barriers, i.e. domain boundary and grain boundary.
format Article
author Sulaiman, Muhammad Azwadi
Hutagalung, Sabar Derita
Mohamed, Julie Juliewatty
Ahmad, Zainal Arifin
Ain, Mohd Fadzil
Ismail, Bakar
author_facet Sulaiman, Muhammad Azwadi
Hutagalung, Sabar Derita
Mohamed, Julie Juliewatty
Ahmad, Zainal Arifin
Ain, Mohd Fadzil
Ismail, Bakar
author_sort Sulaiman, Muhammad Azwadi
title High frequency response to the impedance complex properties of Nb-doped CaCu3Ti4O12 electroceramics
title_short High frequency response to the impedance complex properties of Nb-doped CaCu3Ti4O12 electroceramics
title_full High frequency response to the impedance complex properties of Nb-doped CaCu3Ti4O12 electroceramics
title_fullStr High frequency response to the impedance complex properties of Nb-doped CaCu3Ti4O12 electroceramics
title_full_unstemmed High frequency response to the impedance complex properties of Nb-doped CaCu3Ti4O12 electroceramics
title_sort high frequency response to the impedance complex properties of nb-doped cacu3ti4o12 electroceramics
publisher Elsevier B.V.
publishDate 2011
url http://eprints.utm.my/id/eprint/29160/
http://dx.doi.org/10.1016/j.jallcom.2011.02.145
_version_ 1643648237573242880
score 13.211869

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