摘要
用普通陶瓷工艺制备了掺Co2+及Sn4+的MnZn功率铁氧体材料,研究了Co2+及Sn4+杂质掺入对MnZn功率铁氧体磁性能的影响。研究结果表明,由于Co2+具有大的正的磁晶各向异性常数K1,所以可与MnZn功率铁氧体负的K1进行补偿。当CoO掺入量为2×10-3时,可得到在20～120℃温度范围内具有非常平坦功率损耗 温度特性的MnZn功率铁氧体。Co2+的掺入还可以大大改善MnZn功率铁氧体的起始磁导率的温度特性。由于Sn4+掺入MnZn功率铁氧体时,Sn4+进入晶格中,减少了Fe3+ Fe2+之间的电子跳跃,提高了材料电阻率。当SnO2掺入量为4×10-4时,可得到具有很低功率损耗的MnZn功率铁氧体材料。
MnZn power ferrites materials were prepared using the conventional ceramic technology. The effects of Co^(2+) or Sn^(4+) addition on the magnetic properties of MnZn power ferrites were investigated. The results showed that Co^(2+) has positive magnetocrystalline anisotropy constant _K__1, which can compensate with negative _K__1 of MnZn ferrites. When additive content was 2×10^(-3), very flat power loss dependence with temperature can be obtained at the range of 25～120℃. Additive Co^(2+) can remarkably improve initial permeability temperature dependence. When Sn^(4+) was adulterated to MnZn power ferrites, it comes into grain, which can decrease the Fe^(3+)Fe^(2+) electrons jump and improve the electrical resistivity. As a result, when addition content of SnO_2 was 4×10^(-4), MnZn power ferrites with very low loss can be obtained.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2003年第6期649-651,共3页
Journal of Functional Materials
