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Structural transformations of bioactive glass 45S5next term with thermal treatments

Abstract : We report on the structural transformations of Bioglass® during thermal treatments. Just after the glassy transition, at 550 °C, a glassy phase separation occurs at 580 °C, with the appearance of one silicate- and one phosphate-rich phase. It is followed by the crystallization of the major phase Na2CaSi2O6, from 610 to 700 °C and of the secondary phase, silico-rhenanite, at 800 °C. The latter evolves from the phosphate-rich glassy phase, which is still present after the first crystallization. In order to control the processing of glass-ceramic products from Bioglass®, crystallization kinetics were studied via differential scanning calorimetry measurements in the range of 620–700 °C and temperature–time–transformation curves were established.
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Leila Lefebvre, Jérome Chevalier, Laurent Gremillard, Rachid Zenati, Gilbert Thollet, et al.. Structural transformations of bioactive glass 45S5next term with thermal treatments. Acta Materialia, Elsevier, 2007, 55 (10), pp.3305-3313. ⟨10.1016/j.actamat.2007.01.029⟩. ⟨emse-00508691⟩

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