Effect of Binder Addtion Method on Microstructure and Magnetic Prooperties of Sr-ferrite

결합체 첨가 방법이 Sr-ferrite의 미세구조와 자기적 성질에 미치는 영향

  • 이병교 (경북대학교 공과대학 무기재료공학과) ;
  • 김정주 (경북대학교 공과대학 무기재료공학과) ;
  • 조상희 (경북대학교 공과대학 무기재료공학과)
  • Published : 1990.04.01

Abstract

Effects of binder addition method during compacting on microstructural change and magnetic characteristics of Sr-ferrite system was investigated. Used binders were PVA and PEG, which were added separately or simultaneously. After compacts were heated at 50$0^{\circ}C$ for 3hr in air for burning out all the binders, they were sintered at 125$0^{\circ}C$ for 2h. Based on results, in the case of using the two binders simultaneously, comparing to single binder system, compacted density was somewhat higher but sintered density was rather lower, and abnormal grain growth was accelerated. According to these sintering characteristics, remanent magnetization and coercive force were also diminished.

Keywords

References

  1. J. Kor. Chem. Soc. v.25 no.5 Fe₂O₃Aggregation and Sintering of Ba-Ferrite H.D. Nam;S.H. Cho
  2. J. Am. Ceram. Soc. v.56 no.4 Charaterization and Sintering Behaviour of Ba and Sr Ferrite J.S. Reed(et al.)
  3. ファイソセラミシクス成形と 有機材料 K. Saitoh
  4. J. Appl. Phy. v.34 no.4 Modified Strontium Ferrites, A New Permanent Magnetic Materials A. Cochardt
  5. Ceramic Powders Formation of Crack-like Voids and Agglomerate Mobility due to Differential Sintering F.F. Lange;P. Vincenzini(ed.)
  6. J. Appl. Phys. v.40 no.3 Temperature Dependence of Ms and K₁, Ba$Fe_{12}O_{19}$ and Sr$Fe_{12}O_{19}$ Single Crystals B.T. Shirk;W.R. Bussem
  7. Ceramic Microstructure 76 Importance of Microstructure in Electromic Ceramics K. Okazaki;H. Igarashi;R.M. Fulrath(ed.);J.A. Pask(ed.)
  8. Trans. AIME v.3 Measurement of Particle Size in Opaque Bodies R.L. Fullmann
  9. セラミツクス v.18 no.2 セラミツクス 成形用の 有機材料 K. Saitoh
  10. J. Kor. Chem. Soc. v.27 no.3 Effects of Ball-Milling Time and on Formation and Magnetic Properties of Ba-Ferrite H.D. Nam;S.H. Cho
  11. J. Kor. Ceram Soc. v.25 no.4 Effects of Binder on the Sintering Characteristics of PZT Ceramics W.H. Jung;J.J. Kim;S.H. Cho
  12. Bull Inst. Chem Res Kyoto Univ. v.49 no.71 Condition for the Formation of Compounds Consisting of BaO and Fe₂O₃from Aqueous Suspensions M. Kiyama
  13. Am.Ceram. Bull. v.59 no.16 Binder System in Ferrites J.W. Harvey;D.W. Johnson JR.
  14. Ferrite Proc ICF v.3 The Preparation of Mn-Zn Ferrite by Co-Precipitation H Robbins