Sol-Gel Production and Properties of Spherical Biomaterials for the System TiO2–SiO2 /CaO
| Autor: | Valentina V. Zharkova, Ekaterina S. Lyutova, V. V. Kozik, L. P. Borilo, Anton S. Brichkov |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Equilibrium conditions Oxide Spherical form 01 natural sciences 010309 optics chemistry.chemical_compound chemistry Chemical engineering Mechanics of Materials 0103 physical sciences Materials Chemistry Ceramics and Composites Selectivity Phosphoric acid Sol-gel |
| Zdroj: | Glass and Ceramics. 76:315-320 |
| ISSN: | 1573-8515 0361-7610 |
| DOI: | 10.1007/s10717-019-00191-6 |
| Popis: | The physicochemical properties of the carboxylic cationite Tokem-200 and the sulfo-cationite Tokem-140 as well as their Ca2+-ion selectivity under equilibrium conditions were investigated and Tokem-200 based biomaterials of spherical form were synthesized from solutions by the sol-gel method. The material frame is represented by TiO2–SiO2; the inner part is filled with the oxide Ca2+ (sample TiO2–SiO2 /CaO). Unlike Tokem-140, the carboxylic cationite Tokem-200 possesses the highest Ca2+-ion selectivity, which makes it promising for the development of biomaterials. The solutions were found to remain suitable for up to 5 days for obtaining materials. To obtain a homogeneous material stepped heat-treatment is required (after drying at 60°C) at 150, 250, and 350°C (30 min at each step) and at 600°C for 6 h. Additional post-drying immersion of the samples into phosphoric acid does not favorably affect the properties of the material. |
| Databáze: | OpenAIRE |
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