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Devitrification and dilatometric properties of low T-g unleaded silicate glasses
Linnaeus University, Faculty of Technology, Department of Building and Energy Technology.
Glafo, SE-35196 Vaxjo, Sweden.
2013 (English)In: European Journal of Glass Science and Technology. Part A: Glass Technology, ISSN 1753-3546, Vol. 54, no 3, 108-110 p.Article in journal (Refereed) Published
Abstract [en]

Candidate lead free glass enamels have been sought within the glass system described in general terms by the mole fractions 0.25R(2)O center dot 0.16(R'O,R-2 '' O-3)center dot 0.59SiO(2) where R=Li, Na, K; R'=Ba, Zn and R ''=B, Bi. Glass compositions containing high mole fractions of Li2O were found to devitrify when they were heated to temperatures up to 530 degrees C typical for the procedure used when fusing enamels to tableware glasses. The devitrification characteristics are complex and several peaks attributed to crystallisation were found by DSC characterisation. The thermal expansion coefficient (alpha) within the system ranges from 11-14x10(-6) K-1 and the glass transition temperatures (T-g) between 410-460 degrees C. The measured data could be fitted to the chemical composition by multiple regression analysis with a general equation of the form: (alpha,T-g)=K((alpha/Tg))+Sigma(cRxfR) in which K is a constant, c is the oxide mole fraction and f is an oxide specific factor. The statistical analysis correlation coefficients (r(2)) were around 0.9.

Place, publisher, year, edition, pages
2013. Vol. 54, no 3, 108-110 p.
National Category
Materials Engineering
Research subject
Technology (byts ev till Engineering), Glass Technology
Identifiers
URN: urn:nbn:se:lnu:diva-28364ISI: 000321155700003Scopus ID: 2-s2.0-84881186967OAI: oai:DiVA.org:lnu-28364DiVA: diva2:642628
Available from: 2013-08-22 Created: 2013-08-22 Last updated: 2017-12-06Bibliographically approved

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Jonson, Bo

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CiteExportLink to record
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