Effect of lanthanum additive on electrical and thermal properties of bismuth sodium titanate ceramics

This work investigated the preparation and properties of (Bi0. 5Na0.5)1-1.5xLaxTiO3 ceramics where x = 0, 0.05, 0.10, 0.15 and 0.20 mol fraction. The powders were fabricated by mixed oxide method and calcined at 800°C for 2 h. The ceramic pellets were prepared by uniaxial pressing method and being s...

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Main Authors: Eaksuwanchai P., Jiansirisomboon S., Watcharapasorn A.
Format: Article
Language:English
Published: 2014
Online Access:http://www.scopus.com/inward/record.url?eid=2-s2.0-84891813921&partnerID=40&md5=072a2a06d8ce688cf2208bf10da22be1
http://cmuir.cmu.ac.th/handle/6653943832/7285
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-72852014-08-30T03:51:47Z Effect of lanthanum additive on electrical and thermal properties of bismuth sodium titanate ceramics Eaksuwanchai P. Jiansirisomboon S. Watcharapasorn A. This work investigated the preparation and properties of (Bi0. 5Na0.5)1-1.5xLaxTiO3 ceramics where x = 0, 0.05, 0.10, 0.15 and 0.20 mol fraction. The powders were fabricated by mixed oxide method and calcined at 800°C for 2 h. The ceramic pellets were prepared by uniaxial pressing method and being sintered at various temperatures ranging from 1150-1200°C for 2 h. Bulk densities, phase, electrical and thermal properties were also measured using various techniques. The result showed that all ceramic samples possessed high density and XRD patterns indicated that all ceramics had a main phase of BNT-based composition with rhombohedral (or pseudocubic) structure. The formation of secondary phase was found for sample containing La greater than 0.10 mol fraction. Electrical resistivity measurements at low frequencies indicated a decreasing trend with increasing La addition indicating an increase in electronic conduction. The dielectric constant and thermal conductivity measurements also showed the effects of charged defects induced by La addition and macro defects present by the formed second phase in this material system. © 2013 Copyright Taylor and Francis Group, LLC. 2014-08-30T03:51:47Z 2014-08-30T03:51:47Z 2013 Article 10584587 10.1080/10584587.2013.853572 IFERE http://www.scopus.com/inward/record.url?eid=2-s2.0-84891813921&partnerID=40&md5=072a2a06d8ce688cf2208bf10da22be1 http://cmuir.cmu.ac.th/handle/6653943832/7285 English
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
language English
description This work investigated the preparation and properties of (Bi0. 5Na0.5)1-1.5xLaxTiO3 ceramics where x = 0, 0.05, 0.10, 0.15 and 0.20 mol fraction. The powders were fabricated by mixed oxide method and calcined at 800°C for 2 h. The ceramic pellets were prepared by uniaxial pressing method and being sintered at various temperatures ranging from 1150-1200°C for 2 h. Bulk densities, phase, electrical and thermal properties were also measured using various techniques. The result showed that all ceramic samples possessed high density and XRD patterns indicated that all ceramics had a main phase of BNT-based composition with rhombohedral (or pseudocubic) structure. The formation of secondary phase was found for sample containing La greater than 0.10 mol fraction. Electrical resistivity measurements at low frequencies indicated a decreasing trend with increasing La addition indicating an increase in electronic conduction. The dielectric constant and thermal conductivity measurements also showed the effects of charged defects induced by La addition and macro defects present by the formed second phase in this material system. © 2013 Copyright Taylor and Francis Group, LLC.
format Article
author Eaksuwanchai P.
Jiansirisomboon S.
Watcharapasorn A.
spellingShingle Eaksuwanchai P.
Jiansirisomboon S.
Watcharapasorn A.
Effect of lanthanum additive on electrical and thermal properties of bismuth sodium titanate ceramics
author_facet Eaksuwanchai P.
Jiansirisomboon S.
Watcharapasorn A.
author_sort Eaksuwanchai P.
title Effect of lanthanum additive on electrical and thermal properties of bismuth sodium titanate ceramics
title_short Effect of lanthanum additive on electrical and thermal properties of bismuth sodium titanate ceramics
title_full Effect of lanthanum additive on electrical and thermal properties of bismuth sodium titanate ceramics
title_fullStr Effect of lanthanum additive on electrical and thermal properties of bismuth sodium titanate ceramics
title_full_unstemmed Effect of lanthanum additive on electrical and thermal properties of bismuth sodium titanate ceramics
title_sort effect of lanthanum additive on electrical and thermal properties of bismuth sodium titanate ceramics
publishDate 2014
url http://www.scopus.com/inward/record.url?eid=2-s2.0-84891813921&partnerID=40&md5=072a2a06d8ce688cf2208bf10da22be1
http://cmuir.cmu.ac.th/handle/6653943832/7285
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