Ferroelectric glass-ceramics from the PbO-Bi2O 3-GeO2 system

The glass ceramics from the PbO-Bi3O2-GeO2 system have been investigated. An excellent transparent glass can be obtained from the stoichiometric (S) composition, Pb3Bi2(GeO 4)3, but only by rapid-quenching to give very thin samples. This glass could not therefore be used to make good glass-ceramic s...

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Main Authors: Munpakdee A., Pengpat K., Tunkasiri T., Holland D.
Format: Conference or Workshop Item
Language:English
Published: 2014
Online Access:http://www.scopus.com/inward/record.url?eid=2-s2.0-62949106225&partnerID=40&md5=b5019416204165ec34becc7325be2f2d
http://cmuir.cmu.ac.th/handle/6653943832/5360
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Institution: Chiang Mai University
Language: English
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spelling th-cmuir.6653943832-53602014-08-30T02:56:27Z Ferroelectric glass-ceramics from the PbO-Bi2O 3-GeO2 system Munpakdee A. Pengpat K. Tunkasiri T. Holland D. The glass ceramics from the PbO-Bi3O2-GeO2 system have been investigated. An excellent transparent glass can be obtained from the stoichiometric (S) composition, Pb3Bi2(GeO 4)3, but only by rapid-quenching to give very thin samples. This glass could not therefore be used to make good glass-ceramic samples for measuring the dielectric properties. The A-composition (34.50%PbO :11.49%Bi2O3: 54.01%GeO2) and B-composition (25.90%PbO: 8.63%Bi2O3: 65.47%GeO2) have been prepared to form more stable glasses. These two compositions gave good transparent and thick glass samples. DTA analysis has been used to examine the crystallisation temperatures of all glasses. The controlled heat treatment process has been applied to all crystallisation temperatures and glass-ceramic samples were obtained. It was found that S glassceramic contained Pb 3Bi2(GeO4)3 and Bi 2GeO5 while A glass-ceramic contained only Pb 3Bi2(GeO4)3 and was suitable for using in dielectric measurement. B glass-ceramic gave difficulty in identifying the phases. However, it was concluded that the glass-ceramic from this composition had three phases, which are PbGe4O9, PbGeO5 and Bi4(GeO4)3. Since this glass gave no PbO-Bi2O3-GeO2 ternary phase, the dielectric measurement concentrates only on the A glassceramic. The frequency dependence of ε" for the A glass-ceramic sample gave a loss peak at low frequency. © 2008 Trans Tech Publications, Switzerland. 2014-08-30T02:56:27Z 2014-08-30T02:56:27Z 2008 Conference Paper 9780878493562 10226680 75596 http://www.scopus.com/inward/record.url?eid=2-s2.0-62949106225&partnerID=40&md5=b5019416204165ec34becc7325be2f2d http://cmuir.cmu.ac.th/handle/6653943832/5360 English
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
language English
description The glass ceramics from the PbO-Bi3O2-GeO2 system have been investigated. An excellent transparent glass can be obtained from the stoichiometric (S) composition, Pb3Bi2(GeO 4)3, but only by rapid-quenching to give very thin samples. This glass could not therefore be used to make good glass-ceramic samples for measuring the dielectric properties. The A-composition (34.50%PbO :11.49%Bi2O3: 54.01%GeO2) and B-composition (25.90%PbO: 8.63%Bi2O3: 65.47%GeO2) have been prepared to form more stable glasses. These two compositions gave good transparent and thick glass samples. DTA analysis has been used to examine the crystallisation temperatures of all glasses. The controlled heat treatment process has been applied to all crystallisation temperatures and glass-ceramic samples were obtained. It was found that S glassceramic contained Pb 3Bi2(GeO4)3 and Bi 2GeO5 while A glass-ceramic contained only Pb 3Bi2(GeO4)3 and was suitable for using in dielectric measurement. B glass-ceramic gave difficulty in identifying the phases. However, it was concluded that the glass-ceramic from this composition had three phases, which are PbGe4O9, PbGeO5 and Bi4(GeO4)3. Since this glass gave no PbO-Bi2O3-GeO2 ternary phase, the dielectric measurement concentrates only on the A glassceramic. The frequency dependence of ε" for the A glass-ceramic sample gave a loss peak at low frequency. © 2008 Trans Tech Publications, Switzerland.
format Conference or Workshop Item
author Munpakdee A.
Pengpat K.
Tunkasiri T.
Holland D.
spellingShingle Munpakdee A.
Pengpat K.
Tunkasiri T.
Holland D.
Ferroelectric glass-ceramics from the PbO-Bi2O 3-GeO2 system
author_facet Munpakdee A.
Pengpat K.
Tunkasiri T.
Holland D.
author_sort Munpakdee A.
title Ferroelectric glass-ceramics from the PbO-Bi2O 3-GeO2 system
title_short Ferroelectric glass-ceramics from the PbO-Bi2O 3-GeO2 system
title_full Ferroelectric glass-ceramics from the PbO-Bi2O 3-GeO2 system
title_fullStr Ferroelectric glass-ceramics from the PbO-Bi2O 3-GeO2 system
title_full_unstemmed Ferroelectric glass-ceramics from the PbO-Bi2O 3-GeO2 system
title_sort ferroelectric glass-ceramics from the pbo-bi2o 3-geo2 system
publishDate 2014
url http://www.scopus.com/inward/record.url?eid=2-s2.0-62949106225&partnerID=40&md5=b5019416204165ec34becc7325be2f2d
http://cmuir.cmu.ac.th/handle/6653943832/5360
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