Understanding the crystallization behavior of bioactive glass S53P4 powder compacts under various heating conditions

•S53P4 bioactive glass powder sinters partially without devitrification.•Increased heating rates and temperatures favor sintering over crystallization.•Optimized conditions result in fully amorphous compacts of moderate densification.•Mapping densification and surface crystallization allows assessin...

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Bibliographic Details
Published in:Journal of non-crystalline solids 2024-11, Vol.644, p.123178, Article 123178
Main Authors: Stiller, Adrian, Engblom, Markus, Vainio, Emil, Hupa, Leena
Format: Article
Language:English
Subjects:
Bioactive glass
Crystallization
Microstructure
Powder
S53P4
Sintering
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Summary:•S53P4 bioactive glass powder sinters partially without devitrification.•Increased heating rates and temperatures favor sintering over crystallization.•Optimized conditions result in fully amorphous compacts of moderate densification.•Mapping densification and surface crystallization allows assessing sinterability.•Sintering is inhibited by formation of a compact crystalline surface layer. Different heating conditions markedly affected the competing processes of densification and crystallization of bioactive glass (BAG) S53P4 powder compacts. BAG S53P4, known for its osteostimulative and bacterial growth-inhibiting properties, is a promising material for 3D scaffolds for bone repair and tissue engineering. However, due to its crystallization tendency, the impact of different heat treatments on the glass's sinterability must be better understood. The densification and crystallization of S53P4 powder (
ISSN:0022-3093
DOI:10.1016/j.jnoncrysol.2024.123178