CAJ | 학술논문

用低温烧结法制备NiCoCuZn尖晶石铁氧体,并研究了不同复合添加剂(Bi_2O_3-V_2O_5, Bi_2O_3-PbO)对其磁导率色散行为的影响.结果表明:在Bi_2O_3-V_2O_5复合掺杂时,晶粒尺寸随Bi_2O_3含量的增大而增大.微观结构的变化导致了材料初始磁导率和截止频率的变化.磁导率的色散机制主要以畴壁位移为主.然而在Bi_2O_3-PbO复合掺杂下,晶粒尺寸随Bi_2O_3含量的减小而增大,材料的初始磁导率较Bi_2O_3-V_2O_5复合掺杂更小,截止频率更高.
용저온소결법제비NiCoCuZn첨정석철양체,병연구료불동복합첨가제(Bi_2O_3-V_2O_5, Bi_2O_3-PbO)대기자도솔색산행위적영향.결과표명:재Bi_2O_3-V_2O_5복합참잡시,정립척촌수Bi_2O_3함량적증대이증대.미관결구적변화도치료재료초시자도솔화절지빈솔적변화.자도솔적색산궤제주요이주벽위이위주.연이재Bi_2O_3-PbO복합참잡하,정립척촌수Bi_2O_3함량적감소이증대,재료적초시자도솔교Bi_2O_3-V_2O_5복합참잡경소,절지빈솔경고.
NiCoCuZn spinel ferrites were prepared by a low-temperature sintering procedure with adding different composite additives, Bi_2O_3-V_2O_5 and Bi_2O_3-PbO. The effect of different composite additives on their magnetic permeability dispersion behaviors was investigated. Results show that for the samples with Bi_2O_3-V_2O_5 additive, the grain size increases with increasing of the Bi_2O_3 content in the composite additive. The microstructure change results in variations of initial magnetic permeability values and cutoff frequencies. Their permeability dispersion behaviors are ascribed to the domain wall movement mechanism. However, for the samples with Bi_2O_3-PbO additive, the grain size decreases with increasing of the Bi2O3 content in the composite additive. Compared with samples with Bi2O3-V2O5 additive, their initial magnetic permeability values are smaller, but the cutoff frequencies are higher.