Characterisation of glasses in the TeO2-WO3-PbO system

As potential candidates for photonic devices, non-linear materials and coatings, 22 glasses in the TeO2-WO3-PbO system have been formulated and prepared by conventional melting at temperatures ranging between 710 and 750 °C. The glass forming area has been determined for a wide region of the corresp...

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Autores: Muñoz-Martín, David, Villegas Broncano, María Ángeles, Gonzalo de los Reyes, J., Fernández Navarro, José María
Tipo de recurso: artículo
Estado:Versión enviada para evaluación y publicación
Fecha de publicación:2009
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/88075
Acceso en línea:http://hdl.handle.net/10261/88075
Access Level:acceso abierto
Palabra clave:Thermal properties
Tellurite glasses
Structure
Optical spectroscopy
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spelling Characterisation of glasses in the TeO2-WO3-PbO system Muñoz-Martín, David Villegas Broncano, María Ángeles Gonzalo de los Reyes, J. Fernández Navarro, José María Thermal properties Tellurite glasses Structure Optical spectroscopy As potential candidates for photonic devices, non-linear materials and coatings, 22 glasses in the TeO2-WO3-PbO system have been formulated and prepared by conventional melting at temperatures ranging between 710 and 750 °C. The glass forming area has been determined for a wide region of the corresponding ternary diagram. Structural characterisation of the glasses was conducted through FTIR spectrometry and the variation of density values, which allowed calculation of the glass molar volume and the oxygen molar volume. UV-VIS spectra were recorded to determine optical absorption/transmission and energy gap values. Likewise, such results were correlated with the glasses composition and their ability for optical materials. DTA curves yielded data of transition temperature (Tg), onset crystallisation temperature (Tc) and the thermal stability range of glasses. Crystalline phases formed in devitrified and partially devitrified glasses were detected by X-ray diffraction. The properties and structural features of glasses were discussed in terms of their relative proportion of former/modifier oxides. The main glass former oxide is TeO2, which arranges [TeO4] groups with tetrahedral coordination, while PbO plays as glass modifier oxide. Tungsten oxide is incorporated as network former, alternating with TeO2 and forming mixed linkages Te-O-W and W-O-W. WO3 is the component that contributes most to increase the glass transition temperature, and to decrease both the oxygen molar volume and the thermal expansion coefficient. © 2009 Elsevier Ltd. All rights reserved. Authors wish to thank the financial support of Spanish Ministry of Education and Science (Projects MAT2005-06508-C02-01 and TEC2005-00074/MIC) and the technical support of Dr. C. Gil (National Glass Centre Foundation, Royal Glass Works. La Granja, Spain) and Mr. F. Agua (Centre for Human and Social Sciences, CSIC. Madrid, Spain). No Peer Reviewed Elsevier http://hdl.handle.net/10261/88075
title Characterisation of glasses in the TeO2-WO3-PbO system
spellingShingle Characterisation of glasses in the TeO2-WO3-PbO system
Muñoz-Martín, David
Thermal properties
Tellurite glasses
Structure
Optical spectroscopy
title_short Characterisation of glasses in the TeO2-WO3-PbO system
title_full Characterisation of glasses in the TeO2-WO3-PbO system
title_fullStr Characterisation of glasses in the TeO2-WO3-PbO system
title_full_unstemmed Characterisation of glasses in the TeO2-WO3-PbO system
title_sort Characterisation of glasses in the TeO2-WO3-PbO system
author Muñoz-Martín, David
author_facet Muñoz-Martín, David
Villegas Broncano, María Ángeles
Gonzalo de los Reyes, J.
Fernández Navarro, José María
author_role author
author2 Villegas Broncano, María Ángeles
Gonzalo de los Reyes, J.
Fernández Navarro, José María
author2_role author
author
author
topic Thermal properties
Tellurite glasses
Structure
Optical spectroscopy
topic_facet Thermal properties
Tellurite glasses
Structure
Optical spectroscopy
description As potential candidates for photonic devices, non-linear materials and coatings, 22 glasses in the TeO2-WO3-PbO system have been formulated and prepared by conventional melting at temperatures ranging between 710 and 750 °C. The glass forming area has been determined for a wide region of the corresponding ternary diagram. Structural characterisation of the glasses was conducted through FTIR spectrometry and the variation of density values, which allowed calculation of the glass molar volume and the oxygen molar volume. UV-VIS spectra were recorded to determine optical absorption/transmission and energy gap values. Likewise, such results were correlated with the glasses composition and their ability for optical materials. DTA curves yielded data of transition temperature (Tg), onset crystallisation temperature (Tc) and the thermal stability range of glasses. Crystalline phases formed in devitrified and partially devitrified glasses were detected by X-ray diffraction. The properties and structural features of glasses were discussed in terms of their relative proportion of former/modifier oxides. The main glass former oxide is TeO2, which arranges [TeO4] groups with tetrahedral coordination, while PbO plays as glass modifier oxide. Tungsten oxide is incorporated as network former, alternating with TeO2 and forming mixed linkages Te-O-W and W-O-W. WO3 is the component that contributes most to increase the glass transition temperature, and to decrease both the oxygen molar volume and the thermal expansion coefficient. © 2009 Elsevier Ltd. All rights reserved.
publishDate 2009
format article
status_str submittedVersion
url http://hdl.handle.net/10261/88075
eu_rights_str_mv openAccess
publisher Elsevier
institution Consejo Superior de Investigaciones Científicas (CSIC)
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
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publishDateSort 2009
author_browse Fernández Navarro, José María
Gonzalo de los Reyes, J.
Muñoz-Martín, David
Villegas Broncano, María Ángeles
publisherStr Elsevier
score 6.9303427

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