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采用传统陶瓷工艺制备了Mn掺杂非正分Co铁氧体Co0.7MnxFe2.3-xO4粉体样品。用X射线衍射仪、振动样品磁强计及阻抗分析仪研究样品的结构、磁性能和介电性能。研究表明:样品均以单相尖晶石结构存在,掺Mn降低了材料Curie温度,也使矫顽力和饱和磁化强度减小,Mn掺量x=0.7时,材料的Curie温度、矫顽力和饱和磁化强度分别为314.5℃,6.9×103A/m和13.1×103A/m,均小于未掺Mn时的值;材料的介电性能也与Mn掺量有关,在一定的频率下,随Mn掺量的增加电阻率先减小后增大,而介电常数和介电损耗则先增大后减小。
Abstract：Mn-doped non-stoichiometric cobalt ferrite Co0.7MnxFe2.3-xO4 powders were prepared by traditional ceramic techniques.The structure,magnetic properties and dielectric properties were characterized using an X-ray diffractometer,a vibrating sample magnetometer and an impedance analyzer.The research revealed that all of the samples has a single spinel phase,Mn doping de-creased the Curie temperature of cobalt ferrite while reducing the coercivity and magnetization at the same time.With a dosage of Mn x=0.7,the Curie temperature,coercivity and magnetization were 314.5 ℃,6.9×103 A/m and 13.1×103 A/m,respectively,smaller than that of materials without Mn dosage.It also revealed that the dielectric properties of the material also change with Mn dosage;the resistivity first decreases and then increases with increasing Mn dosages under certain frequencies while the dielectric constant and dielectric loss are opposite.
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基本信息:
中图分类号:TM277
引用信息:
[1]金沈贤,钟智勇,张怀武.锰掺杂钴铁氧体粉体的磁性能和介电性能[J].硅酸盐学报,2007(07):838-842.
基金信息:
国家自然科学基金(60490296,60671029,90306015)资助项目
2007-07-15
2007-07-15