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Investigation of Chemically Modified ICIE16 Bioactive Glass, Part II

F.J. Hmood, F. Schmidt, O. Goerke, J. Günster

Journal of Ceramic Science and Technology, Vol. 11, No. 1 (2020), pp. 1-10

DOI: 10.4416/JCST2019-00031

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Abstract

Chemically modified bioactive glasses based on ICIE16 were prepared with the melt-quenching method using water as a quenching medium. The sinterability of these bioactive glasses was investigated and is discussed in this article. The sintering experiments were conducted with different sintering temperatures, sintering times and heating rates. Those parameters are crucial for dense glass with an amorphous structure. The particle size (d50) of the starting glass powder was determined at 88 µm and kept constant. The pre-pressed glass pellets were cold-isostatically pressed at 300 MPa to a green density of around 63 %. Density development, phase identification, shrinkage behavior and the microstructure were investigated to determine the sinterability of the developed glasses. The glass powders were sintered at different temperatures inside the processing window while crystallization was monitored. The results have shown that the sinterability of the developed glasses strongly depends on the proposed chemical additions. The highest density reached was 96 %, which belongs to BP1 glass with sintering conditions of 20 K/min heating rate for 60 min at 750 °C.

Keywords

Bioactive glass, viscous sintering, crystallization, processing window, grain boundary

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