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Journal of the Korean Ceramic Society 1997;34(3): 289. |
| 제조 공정이 Mn-Zn 페라이트의 미세구조와 전기적 특성에 미치는 영향 |
| 박형률, 김진호1 |
삼성코닝 세라믹 사업팀
1경북대학교 무기재료공학과 |
| Effects of Ceramic Processing on the Microstructure and Electronic Properties of Low Loss Mn-Zn Ferrite |
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| ABSTRACT |
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Effect of ceramic processing was investigated on the microstructure and electronic properties of low loss Mn-Zn ferrite. Addition of CaO and SiO2 to calcined powder rather than to raw materials mixtured resulted in finer-grained microstructure. Higher oxygen pressure during sintering caused microstructural inhomogeneity and the increase in power loss and disaccommodation factor. Relatively low power loss was found for sintering up to 130$0^{circ}C$ from powders calcined at high temperature and milled shortly. It was caused by slow densification rate and normal grain growth up to 130$0^{circ}C$. Calcination at low temperature and prolonged milling enhanced den-sification, which gave a fine grained microstructure and low powder loss at sintering temperture below 120$0^{circ}C$. Sintering temperature above 125$0^{circ}C$, however, showed abnormal grain growth. |
| Key words:
Low Loss Mn-Zn Ferrite, Equilibrium Po2, Ceramic processing, Electronic properties, Microstructure |
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