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Devitrification and dilatometric properties of low Tg unleaded silicate glasses
RISE., SP – Sveriges Tekniska Forskningsinstitut, Glafo Glasforskningsinstitutet.ORCID-id: 0000-0002-9173-0847
2013 (Engelska)Ingår i: Glass Technology: European Journal of Glass Science and Technology Part A, ISSN 1753-3554, 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 2O.0·16(R'O, R2"O3). 0·59SiO2 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°C typical for the procedure used when fusing enamels to tableware glasses. The devitrification characteristics are complex and several peaks atributed to crystallisation were found by DSC characterisation. The thermal expansion coefficient(α) within the system ranges from 11-14×10-6 K-1 and the glass transition temperatures(Tg) between 410-460°C. The measured data could be fitted to the chemical composition by multiple regression analysis with a general equation of the form:(α, Tg)=K(α/T g)+Σ(cR×fR) in which K is a constant, c is the oxide mole fraction and f is an oxide specific factor. The statistical analysis correlation coefficients(r2) were around 0·9.

Ort, förlag, år, upplaga, sidor
2013. Vol. 54, nr 3, s. 108-110
Nyckelord [en]
Chemical engineering
Nyckelord [sv]
Kemiteknik
Nationell ämneskategori
Kemiteknik
Identifikatorer
URN: urn:nbn:se:ri:diva-905Scopus ID: 2-s2.0-84881186967OAI: oai:DiVA.org:ri-905DiVA, id: diva2:958446
Tillgänglig från: 2016-09-07 Skapad: 2016-09-07 Senast uppdaterad: 2018-08-14Bibliografiskt granskad

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