Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Magnetic Properties of Co-substituted Ba-ferrite Powder by Sol-gel Method

졸-겔법에 의한 Cobalt 치환된 Ba-ferrite 분말의 자기적 특성

  • Choi, Hyun-Seung (School of Materials Science and Engineering, Pusan National University) ;
  • Park, Hyo-Yul (Korea Electrotechnology Research Institute) ;
  • Yoon, Seog-Young (School of Materials Science and Engineering, Pusan National University) ;
  • Shin, Hak-Gi (Devision of Food Chemicla Engineering, Kyungnam Colloge of Information and Technology) ;
  • Kim, Tae-Ok (School of Materials Science and Engineering, Pusan National University)
  • 최현승 (부산대학교 무기재료공학과) ;
  • 박효열 (한국전기연구원) ;
  • 윤석영 (부산대학교 무기재료공학과) ;
  • 신학기 (경남정보대학 식품화공학부) ;
  • 김태옥 (부산대학교 무기재료공학과)
  • Published : 2002.01.01
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Abstract

In this study, nano-sized Si-C-N precursor powders were synthesized by Chemical Vapor Condensation Method(CVC) using TMS(Tetramethylsilane: $Si(CH_3)_4$), $NH_3$ and $H_2$ gases under the various reaction conditions of the reaction temperature, TMS/$NH_3$ ratio and TMS/$H_2$ ratio. XRD and FESEM were used to analysis the crystalline phase and the average particle size of the synthesized powders. It was found that the obtained powders under the considering conditions were all spherical amorphous powder with the particle size of 87∼130 nm. The particle size was decreased as the reaction temperature increased and TMS/$NH_3$ and TMS/$H_2$ ratio decreased. As the results of EA analysis, it was found that the synthesized powders had been formed the powders composed of Si, N, C and H. Through FT-IR results, it was found that the synthesized powders were Si-C-N precursor powders with Si-C, Si-N and C-N bonds.

본 연구에서는 TMS[Tetramethylsilane:$Si(CH_3)_4$], $NH_3$와 $H2$를 이용하여 나노크기의 Si-C-N precursor 분말을 합성하기 위하여 CVC법을 이용하였으며 반응온도, TMS/$NH_3$ 비 그리고 TMS/$H_2$ 비를 변화시켰다. XRD와 FESEM 분석을 통해서 결정상과 입자의 크기 그리고 입자의 형태를 관찰하고자 하였으며, 그 결과 제조된 분말은 모든 실험 조건하에서 87∼130 nm 크기를 지닌 균일한 구형의 비정질 분말이 얻어졌다. 입자 크기는 반응온도의 감소에 따라 감소하였으며, 또한 TMS/$NH_3$, TMS/$H_2$ 비가 작아질수록 감소하였다. EA 분석 결과 제조된 분말은 Si, N, C, H로 이루어졌음을 알 수 있었으며 FT-IR를 통하여 Si-N, C-N, Si-C 결합을 가진 Si-C-N precursor 분말이 제조되었다.

Keywords

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