碳纤维添加对低温固相反应法合成锰锌铁氧体微粉结构和性能的影响

摘要

Mn-Zn ferrite powder was synthesized at 900℃without pulverization by adding hydrophilic carbon fiber in the mixture of the raw material. The structure and morphology of the samples were characterized by X-ray diffraction and scanning electron microscopy, respectively. Effect of carbon fiber adding on the magnetic property of the samples was investigated by vibrating sample magnetometer. The particle diameter gets bigger with the increase of carbon amount. However, too much carbon fiber adding would deteriorate the magnetic performance of the ferrite powder. With the addition of 0.5wt%carbon, content of spinel phase reach the highest. With the addition of 0.64wt%, powders with highest specific saturation magnetization can be obtained.%通过在锰锌铁氧体原料粉末中添加适量的亲水碳纤维，在900℃反应合成了不经粉碎即可使用的锰锌铁氧体微粉。利用 SEM、XRD、VSM 等手段观测粉体的形貌、结构、性能，确定了热处理的工艺条件，并分析了碳纤维添加量对样品磁性能的影响。结果表明，粉体粒径随碳纤维添加量的增加而增大，当碳纤维添加过量时则会损害样品的磁性能。对于本实验的铁氧体组成，碳纤维的添加为0.5wt%时所得锰锌铁氧体微粉的尖晶石相含量最高，添加量为0.64wt%时饱和磁化率Ms最高。