Structural transformations of bioactive glass 45S5 with thermal treatments
L Lefebvre, J Chevalier, L Gremillard, R Zenati… - Acta Materialia, 2007 - Elsevier
Acta Materialia, 2007•Elsevier
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 …
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 …
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.
Elsevier
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