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¸Õ²Å²éѯÁË ÓÐEI¼Ç¼¡£¹§Ï²°¡ Accession number: 20115014602316 Title: Effect of Li2O on viscosity and thermal expansion of silicate glass Authors: Yang, Kun1 ; Zheng, Weihong1 ; Cheng, Jinshu1 Author affiliation: 1 Key Laboratory for Silicate Materials Science and Engineering, Ministry of Education, Wuhan University of Technology, Wuhan 430070, China Corresponding author: Yang, K. (34762900@163.com) Source title: Advanced Materials Research Abbreviated source title: Adv. Mater. Res. Volume: 403-408 Monograph title: MEMS, NANO and Smart Systems Issue date: 2012 Publication year: 2012 Pages: 70-74 Language: English ISSN: 10226680 ISBN-13: 9783037853122 Document type: Conference article (CA) Conference name: 2011 7th International Conference on MEMS, NANO and Smart Systems, ICMENS 2011 Conference date: November 4, 2011 - November 6, 2011 Conference location: Kuala Lumpur, Malaysia Conference code: 87709 Sponsor: Int. Assoc. Comput. Sci. Inf. Technol.; Singapore Institute of Electronics Publisher: Trans Tech Publications, P.O. Box 1254, Clausthal-Zellerfeld, D-38670, Germany Abstract: Viscosity, coefficient of thermal expansion, glass transition temperature and dilatometric softening temperature of soda-lime-silicate glass doped with Li2O were investigated by the rotating crucible viscometer and dilatometry, the melting temperature and activation energy for viscous flow of the studied melt were derived on the basis of Arrhenius Equation, in order to reveal the effects of Li2O on the properties of soda-lime-silicate glass. The results showed that the viscosity of soda-lime-silicate glass was effectively decreased and the melting temperature decreased from 1457¡ãC to 1420¡ãC with the increase of Li2O from 0 to 1.0wt%, furthermore, the Tg and Ts reduced 30∼40¡ãC. The ¦¤T responded to the range of viscosity of glass formation (¦Ç=10 3-107Pa&bulls) increased from 309.84¡ãC to 313.45¡ãC, and the activation energy for viscous flow decreased form 178.47 kJ&bullmol-1 to 168.34 kJ&bullmol-1. The CTE ¦Á (25∼400¡ãC) of specimen doped with 0.4% Li2O was 92.048¡Á10-6¡ãC-1 and the lowest of the samples. © (2012) Trans Tech Publications, Switzerland. Number of references: 13 Main heading: Thermal expansion Controlled terms: Activation energy - Expansion - Glass - Glass transition - Lime - Melting point - Metal melting - Silicates - Viscometers - Viscosity - Viscous flow Uncontrolled terms: Arrhenius equation - Dilatometric softening temperatures - Dilatometry - Glass formation - Silicate glass - Soda lime silicate glass Classification code: 951 Materials Science - 943.3 Special Purpose Instruments - 931.3 Atomic and Molecular Physics - 931.2 Physical Properties of Gases, Liquids and Solids - 815.1 Polymeric Materials - 812.3 Glass - 812 Ceramics, Refractories and Glass - 631.1 Fluid Flow, General - 531.1 Metallurgy - 414 Masonry Materials - 412 Concrete DOI: 10.4028/www.scientific.net/AMR.403-408.70 Database: Compendex [ Last edited by imyourkobe on 2011-12-26 at 21:54 ] |
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