Predicting physical and chemical properties of bioactive glasses from chemical composition. Part 2: Devitrification characteristics

H Arstila, E Vedel, Leena Hupa, Mikko Hupa

    Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

    27 Citeringar (Scopus)

    Sammanfattning

    The tendency to devitrification was studied for 30 glass compositions in the range of interest for bioactivity (Na(2)O-K(2)O-MgO-CaO-B(2)O(3)-P(2)O(5)-SiO(2)). The glass transition and devitrification temperatures were determined by differential thermal analysis and hot stage microscopy. The crystal phases that formed were analysed by powder x-ray diffraction and SEM/EDXA. Depending on their alkaline oxide contents, the glasses tended to devitrify into wollastonite or sodium calcium silicate type crystals. The higher the alkaline oxide content, the lower was the devitrification temperature. Mathematical models describing the dependence of glass transition and devitrification temperatures on oxide composition were derived and successfully tested on four reference glass compositions. The models can be used to choose glass compositions with working properties suitable for specific high temperature processes.
    OriginalspråkOdefinierat/okänt
    Sidor (från-till)260–265
    Antal sidor6
    TidskriftEuropean Journal of Glass Science and Technology Part a Glass Technology
    Volym49
    Utgåva6
    StatusPublicerad - 2008
    MoE-publikationstypA1 Tidskriftsartikel-refererad

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