Two-step sinter-crystallization of K2O–CaO–P2O5–SiO2 (45S5-K) bioactive glass
| Autor: | Laís D. Silva, Viviane Oliveira Soares, Francisco C. Serbena, Fernanda C. Puosso, Simone do R.F. Sabino, Oscar Peitl Filho, Edgar Dutra Zanotto, Murilo C. Crovace |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science Process Chemistry and Technology Sintering 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Indentation hardness Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Crystal Flexural strength law Bioactive glass 0103 physical sciences Materials Chemistry Ceramics and Composites Crystallization Composite material 0210 nano-technology Bone regeneration Elastic modulus |
| Zdroj: | Ceramics International. 47:18720-18731 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2021.03.207 |
| Popis: | Bioactive glasses and glass-ceramics (GCs) effectively regenerate bone tissue, however most GCs show improved mechanical properties. In this work, we developed and tested a rarely studied bioactive glass composition (24.4K2O-26.9CaO-46.1SiO2-2.6P2O5 mol%, identified as 45S5-K) with different particle sizes and heating rates to obtain a sintered GC that combines good fracture strength, low elastic modulus, and bioactivity. We analyzed the influence of the sintering processing conditions in the elastic modulus, Vickers microhardness, density, and crystal phase formation in the GC. The best GC shows improved properties compared with its parent glass. This glass achieves a good densification degree with a two-step viscous flow sintering approach and the resulting GC shows as high bioactivity as that of the standard 45S5 Bioglass®. Furthermore, the GC elastic modulus (56 GPa) is relatively low, minimizing stress shielding. Therefore, we unveiled the glass sintering behavior with concurrent crystallization of this complex bioactive glass composition and developed a potential GC for bone regeneration. |
| Databáze: | OpenAIRE |
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