摘要
采用氧化物陶瓷工艺制备MnZn功率铁氧体。通过对铁氧体微结构的表征及电、磁性能的测试,研究了ZrO2对MnZn功率铁氧体起始磁导率（iμ）和损耗（Pcv）温度特性的影响。结果表明,随着ZrO2添加量的增加,室温下MnZn功率铁氧体的iμ及电阻率均先增大后减小,损耗则先减小后增大;当w（ZrO2）=0.02%时,iμ和电阻率达到最大值,损耗最低。此外,铁氧体的iμ-T曲线Ⅱ峰及损耗最低点所对应的温度随着ZrO2掺杂量的增加向低温移动。当w（ZrO2）=0.02%时,MnZn功率铁氧体在25~120℃的宽温范围内保持较低损耗。
The MnZn power ferrites were prepared by the conventional oxide ceramic process.The influence of ZrO2 addition on the temperature dependence of the initial permeability（μi） and losses（Pcv） of MnZn power ferrites were investigated by means of characterizing the microstructure and electrical and magnetic properties.The results indicated that at room temperature,both the initial permeability（μi） and electrical resistivity of MnZn power ferrites increased initially and then decreased with the increase of ZrO2 additive,while the losses changed conversely.When the mass fraction of the ZrO2 was w（ZrO2）=0.02%,the MnZn power ferrites showed the highest initial permeability and electrical resistivity,while the power losses was lowest.Meanwhile,both the temperature of secondary maximum peak of μi-T curve and the corresponding temperature of the minimum loss moved to the lower temperature with the ZrO2 additive increasing.Finally,when w（ZrO2） was 0.02%,the MnZn power ferrites had lower power losses within wide temperature from 25 ℃ to 120 ℃.
出处
《压电与声光》
CSCD
北大核心
2011年第2期258-263,共6页
Piezoelectrics & Acoustooptics
基金
国防预研基金资助项目(G02010301YL030403)
