锰锌铁氧体制备工艺及其对磁性玻璃陶瓷性能的影响

Effect of Mn-Zn ferrite synthesized by different method on magnetic glass-ceramics

采用氧化物煅烧法、共沉淀法和溶胶-凝胶法制备锰锌铁氧体前驱体,并将其与生物玻璃陶瓷复合,制备磁性玻璃陶瓷。研究了不同工艺制备的铁氧体对材料磁性、生物活性和细胞亲和性的影响。结果表明,充磁至7.96×105 A/m,材料的饱和磁化强度在7.49～6.46A.m2/kg之间,矫顽力在9.95×103～1.60×104 A/m之间。其中使用共沉淀法制备铁氧体前驱体使复合材料磁滞回线包围面积最大,预期有最好的生热能力。而各铁氧体的掺入均导致材料生物活性下降,但在浸泡入模拟体液21d后,各材料表面均能生成类磷灰石层。将ROS17/2.8细胞与共沉淀法制备的铁氧体复合材料共同培养7d,材料显示出良好的细胞亲和性。

In present research,Mn-Zn ferrite precursor was synthesized by sol-gel,cooperation and oxides calcining method,respectively.The effect of different Mn-Zn ferrite precursor on the magnetic property and bioactivity of magnetic bioactive glass-ceramics was studied.The results show that the doping ferrites result in a magnetic behavior of the composites.Under a magnetic field of 7.96×105A/m,the saturation magnetization of materials lies in the range 7.49-6.46A·m2/kg,and the coercive force lies in the range 9.95×103-1.60×104A/m.The saturation magnetization and coercive force of the composite containing ferrite synthesized from cooperation are relatively high,and the hysteresis loop aera is the max.Thus this composite is expected to have the best heat generating ability.The doping ferrite leads to the decrease of bioactivity.But after soaking in simulated body fluid for 21d,the surfaces of all composites are coated by an apatite like layer.After co-culturing with ROS17/2.8 cells for 7d,material containing ferrite synthesized from cooperation shows good cell affinity.