在磷灰石/硅灰石生物活性玻璃陶瓷(A-WGC)中掺杂锰锌铁氧体, 制备出一种新型的磁性生物活性玻璃陶瓷, 并研究了不同制备工艺对其磁性和生物活性的影响. 结果表明, 使用不同掺杂工艺制备的材料的主晶相均为硅灰石、磷灰石、氟磷灰石和分子式为Zn0.75Mn0.75Fe 1.5O4的锰锌铁氧体. 在充磁至7.96×105A·m-1时, 各材料的饱和磁化强度相差不大, 在5.4~5.9A·m2·kg-1之间. 材料的生物活性与烧结前和锰锌铁氧体前驱体复合的A-WGC原料的反应活性有关, A-WGC原料的反应活性越低, 材料的生物活性越好. 比较各材料, 采用将A-WGC前驱体高温煅烧后再与锰锌铁氧体前驱体固相混合的工艺制备的材料具有良好的磁性和较高的生物活性.
Novel magnetic bioactive glass-ceramics (MGC) in the system MgO-CaO-SiO2-P2O5-CaF2-MnO-ZnO-Fe2O3 were synthesized by doping Mn-Zn ferrite in apatite-wollastonite glass-ceramics (A-WGC). The effect of preparation methods on the magnetic performance and bioactivity of MGC was studied. The results show that apatite, wollastonite, flourapatite and Zn0.75Mn0.75Fe 1.5O4 are the main phases of MGC. Under a magnetic field of 7.96×105A·m-1, the saturation magnetization of MGC fabricated by different ways ranges from 5.4A·m2·kg-1 to 5.9A·m2·kg-1. Mn-Zn doping ferrite decreases the bioactivity of A-WGC. It takes at least 14d for a hydroxyapatite layer forming on the surface of MGC. Comparing with all the materials, the sample synthesized by mixing the heated A-WGC precursors with Mn-Zn ferrite precursor has proper magnetism and best bioactivity.
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