钴铁氧体的溶胶凝胶燃烧法制备及其物性检测  

Dielectric and Magnetic Properties of Synthesized Cobalt Ferrite Derived from Sol-gel Combustion Method

作　　者：叶有祥[1] 周盛华 

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093 [2]中国计量大学光学与电子科技学院,杭州310018

出　　处：《有色金属材料与工程》2017年第6期331-333,共3页Nonferrous Metal Materials and Engineering

基　　金：浙江省科技厅公益项目(2017C33005)

摘　　要：通过溶胶凝胶燃烧法制备了钴铁氧体(CoFe_2O_4)纳米颗粒,并通过压片退火成型.XRD图谱显示样品成分无杂相.通过介电测试仪和振动样品磁强计测试了样品在室温下的介电性能和磁性能.试验结果表明,其介电常数和损耗都随着频率的变化而变化并展现出频散的行为,在低频范围内随着频率的增加而急剧减小,在高频范围内减小不明显.此外,其磁滞回线显示该类材料的饱和磁化强度、剩余磁化强度和矫顽力场分别为81.8emu·g^(-1),29.4emu·g^(-1)和834.9Oe.样品展现出良好的磁性能.A kind of Cobalt ferrite nanocrystalline powders was successfully prepared by using sol-gel combustion method.The sample was formed by pressing and annealing.The X-diffraction diagram demonstrated the sample has no impurity phase.The dielectric and magnetic properties of the sample were measured at room temperature by the dielectric tester and vibrating sample magnetometer.The relative dielectric constant and loss tangent of the sample changed along with frequency and showed the behavior of frequency dispersion,which decreased rapidly with frequency increasing in the lower frequency region but decreased slowly with a very low value at higher frequencies.In addition,the hysteresis loops displayed is kind of material＇s saturation magnetization,residual magnetization and coercivity field was 81.8 emu·g^-1,29.4 emu·g^-1 and 834.9 Oe respectively.The sample exhibited good magnetic characteristics.

关 键 词：钴铁氧体 溶胶凝胶燃烧法 介电性 磁性能 

分 类 号：TM277[一般工业技术—材料科学与工程]