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Journal of the Korean Ceramic Society 1998;35(10): 1055. |
| 입자분포가 Mn-Zn Ferrite의 전자기적 물성에 미치는 경향 |
| 강남규, 서정주, 신명승1, 한명호 |
성균관대학교 재료공학과
1이수세라믹(주) |
| The Effects of Particle Size Distribution on Electromagnetic Properties of Mn-Zn Ferrites |
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| ABSTRACT |
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The effects of particle size distribution have been investigated on the high frequency low loss Mn-Zn fer-rites. The particle size distribution was controlled by milling time. Zirconia ball and engineering plastic jar were employed to avoid iron contamination from the milling media. As increasing the milling time BET value was increased from 0.55 to 3.21m2/g and mean particle size was decreased from 2.1 $mutextrm{m}$ to 1.0$mutextrm{m}$ The large specific surface area of initial powder resulted in the high density of sintered core. However starting powders with high BET lead to inhomogeneous grain growth as well as poor electromagnetic pro-perties at sintering temperature above 1300$^{circ}C$ |
| Key words:
Mn-Zn Ferrites, Particle size, BET, Powder loss, Permeability |
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