Effect of Mn–Zn ferrite on apatite–wollastonite glass-ceramic (A–W GC)
| Autor: | Mao Mao, Tao Hua Pan, Guang Da Li, Guo Sheng Chen, Da Li Zhou, Yun Lin, Guo Yan |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Ceramics
Time Factors Materials science Simulated body fluid Biomedical Engineering Mineralogy Biocompatible Materials Bioengineering engineering.material Ferric Compounds Wollastonite Apatite law.invention Biomaterials Magnetics X-Ray Diffraction law Apatites Materials Testing Glass-ceramic Silicates Fluorapatite Doping Calcium Compounds Body Fluids visual_art Microscopy Electron Scanning visual_art.visual_art_medium engineering Ferrite (magnet) Powders Powder diffraction Nuclear chemistry |
| Zdroj: | Biomedical Materials. 4:045001 |
| ISSN: | 1748-605X 1748-6041 |
| DOI: | 10.1088/1748-6041/4/4/045001 |
| Popis: | Magnetic bioactive glass-ceramics (M GC) were prepared by doping apatite-wollastonite glass-ceramic (A-W GC) with Mn-Zn ferrite. The effect of different contents of Mn-Zn ferrite on the phase structure, magnetic property and bioactivity of A-W GC was investigated. X-ray powder diffraction results showed that A-W GC exhibited apatite, fluorapatite and wollastonite as the main phases. The doping of Mn-Zn ferrite caused the formation of a new phase Zn(0.75)Mn(0.75)Fe(1.5)O(4) in M GC. The amount of this new phase increased with increasing content of Mn-Zn ferrite. Under a magnetic field of 7.96 x 10(5) A m(-1), the saturation magnetization of M GC increased from 4.63 to 9.7 A m(2) kg(-1), but the coercive forces of M GC decreased from 2.39 x 10(4) to 7.56 x 10(3) A m(-1) as the Mn-Zn ferrite content increased from 5% to 20% in the material. The bioactivity of samples was evaluated by soaking in simulated body fluid (SBF). The results showed that the doping of Mn-Zn ferrite decreased the bioactivity of A-W GC dramatically. It took 7 days for an apatite layer to form on the surface of A-W GC, while at least 30 days was needed for an apatite layer forming on the surface of M GC. |
| Databáze: | OpenAIRE |
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