A Study on the Magnetic Properties of Mn-Zn ferrite added on $V_2O_5$ and $CaCo_3$

$V_2O_5$$CaCo_3$를 첨가한 Mn-Zn Ferrite의 자기적 특성에 관한 연구

  • 권오흥 (관동대학교 정보통신공학과)
  • Published : 2002.10.01

Abstract

Recently in the progress of electronic equipment, power transformer was considered an important part. To make power transformer with miniaturization, lightening, low Power, we need a high efficiency core material. In this paper, we added $V_2$$O_{5}$ and $CaCo_3$ to Mn-Zn Ferrite to make a high efficiency, low loss core material. The compositions are MnO : ZnO : $Fe_2$$O_3$=37 : 11 : 52 mol%. They were sintered at 1250 for Three hours. Initial permeability was measured at 0.1 MHz. At 200 mT, Power loss was measured by temperature changing at 25 KHz, 50 KHz, 100 KHz. When we added $V_2$$O_{5}$ and $CaCo_3$, 0.08 wt%, 0.05 wt% respectively, we get 415 ㎾/㎥ at 200 mT, 100 KHz, $60^{\circ}C$. We can reduce eddy current loss as a main loss of high frequency by addition of a little mount of $V_2$$O_{5}$ $CaCo_3$. So we can decrease the power transformer's power loss.

최근의 전자기기 제품에서 전원 트랜스는 매우 중요한 비중을 차지하고 있다. 이러한 전원트랜스의 소형화, 경량화, 소전력화를얻기 위해서는, 고성능의 자심재료가 필요하다. 본 논문에서는 고성능, 저손실의 자심재료를 위해 Mn-Zn Ferrite에 $V_2$$O_{5}$$CaCo_3$를 첨가하였다. 조성은 MnO : ZnO : $Fe_2$$O_3$=37 : 11 : 52 mol%로 하였다. 이 시료를 $1250^{\circ}C$에서 3시간 소결하였다. 측정은 0.1 MHz에서 초투자율을 측정하였으며, 전력손실은 200 mT에서 25 KHz, 50 KHz, 100 KHz 및 온도를 변화시켜 측정하였다. $V_2$$O_{5}$$CaCo_3$이 각각 0.08 wt%, 0.05 wt% 첨가하였을 경우 측정조건 200 mT, 100 KHz, $^60^\circ}C$에서 415 ㎾/$m^2$의 값을 얻을수 있었다. 따라서$ V_2$$O_{5}$$CaCo_3$를 소량 첨가함으로써 고주파수에서의 주 손실인 와전류 손실을 줄여 전원 트랜스의 전력손실을 저하시킬 수 있었다.

Keywords

References

  1. E. C. Snelling, Soft Ferrite, Properties and Applications, 2nd Edition, Butterworth Co. Ltd., London (1988)
  2. A Goldman, Modern Ferrite Technology, Van NostrandReinhold, New York (1990)
  3. E. Otsuki, Proc. of The 6Th Inter. Conf. on Ferrites, 59(1992)
  4. Y. Matsuo and K. Ono, IEEE. Trans. Mag., 33(5), 3751(1997) https://doi.org/10.1109/20.619560
  5. R. Leburgeois, C. Delijune, J. P. Ganne, P. Perriant, B.Lloret, J. L. Rolland : 'New Mn-Zn Low-Loss PowerFerrite for up to 1 MHz', Proc. ofThe Sixth Int. Cont. onFerrites (ICF6) Tokyo and Kyoto, Japan 1169-1172(1992)
  6. A. Znidaisic et al. : 'Microstructure Control in Low-LossPower ferrites', Proc. of The Sixth int Conf. on Ferrites(ICF6), Tokyo and Kyoto, Japan, 333-336 (1992)
  7. T. Akahi: 'Effect of the Addition ofCaO and SiQ$_{2}$ on TheMangnetic Characteristics and Microstructure of Manganese-Zinc Ferrites' Trans. Jpn. Inst. Met, 2, 171-176 (1961) https://doi.org/10.2320/matertrans1960.2.171