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Devitrification and dilatometric properties of low T-g unleaded silicate glasses
Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för bygg- och energiteknik (BE).
Glafo, SE-35196 Vaxjo, Sweden.
2013 (Engelska)Ingår i: European Journal of Glass Science and Technology. Part A: Glass Technology, ISSN 1753-3546, Vol. 54, nr 3, s. 108-110Artikel i tidskrift (Refereegranskat) 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.

Ort, förlag, år, upplaga, sidor
2013. Vol. 54, nr 3, s. 108-110
Nationell ämneskategori
Materialteknik
Forskningsämne
Teknik, Glasteknologi
Identifikatorer
URN: urn:nbn:se:lnu:diva-28364ISI: 000321155700003Scopus ID: 2-s2.0-84881186967OAI: oai:DiVA.org:lnu-28364DiVA, id: diva2:642628
Tillgänglig från: 2013-08-22 Skapad: 2013-08-22 Senast uppdaterad: 2017-12-06Bibliografiskt granskad

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Jonson, Bo

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European Journal of Glass Science and Technology. Part A: Glass Technology
Materialteknik

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