하소분체의 입도조절에 따른 $BaTiO_3$ 요업체의 비정상 입성장거동

Abnormal Grain Growth Behaviors of $BaTiO_3$ Ceramics with Controlling of Particle Size Distributjion of Calcined Powder

  • 이태헌 (경북대학교 무기재료공학과) ;
  • 김정주 (경북대학교 무기재료공학과) ;
  • 김남경 (경북대학교 무기재료공학과) ;
  • 조상희 (경북대학교 무기재료공학과)
  • 발행 : 1995.02.01

초록

Abnormal grain growth behavior of BaTiO3 ceramics with controlling of particle size distribution of calcined powder was investigated. The particle size distribution was controlled by changing the calcining temperature or by using of classification and regrinding process. With broadening of the normallized size distribution in calcined powder, it showeda normal grain growth behavior in sintered body due to an increase of volume fraction of seed grain in the calcined powder. It was supposed that the seed grains could easily contact each other for the rapid grain growth during sintering process and resulted in fast switching-over from abnormal to normal grain growth stage.

키워드

참고문헌

  1. Electronic Ceramics Positive Temperature Coefficient Resistors W. Heywang;H. Thomann;B.C.H. Steele(ed.)
  2. J Am. Ceram Soc. Bull v.72 no.3 Process Continues in Capacitor Technology Laurel Sheppard
  3. Int. J. High Technology Ceramics v.3 Barium Titanate Based Ceramic Materials for Dielectric Use Detlew Hennings
  4. Philps tech. Rev. v.31 no.3;4 Controlling the properties of electroceramic materials through their microstructure G.H. Jonker;A.L. Stuijts
  5. J Appl. Phys. v.47 no.1 Grain-size effects on dielectric properties in barium titanate ceramics Kyoichi Kinoshita;Akihiko Yamaji
  6. Introduction to Ceramics(2nd Edition) W.D. Kingery(et al.)
  7. J. Am. Ceram. Soc. v.54 Exaggerated Grain Growth in Liquid-Phase Sintering of BaTiO₃ Yoshihiro Matsuo;Hiromu Sasaki
  8. Ceramic Transactions;Sintering of Advanced Ceramics v.7 Discontinuous Grain Growth in Multiphase Ceramics D. Kolar;C.A. Handwerker(et al. ed.)
  9. J. Am. Ceram. Soc. v.73 no.8 Role of Grain Size in the Strength and R-curve Properties of Alumina P. Chantikul;S.J. Bennison;B.R. Lawn
  10. J. Am. Ceram. Soc. v.73 no.3 Grain Size Control in Low-Voltage Varistors Detlew F.K. Hennings;Ruediger Hartung;Piet J.L. Reijnen
  11. Ceramics and Glasses;Engineered Materials Handbook v.4 Grain Growth S.J. Bennison;S.R. Lampman(etc. ed.)
  12. Acta Metall. v.13 no.3 On the Theory of Normal and Abnormal Grain Growth M. Hillert
  13. J. Am. Ceram. Soc. v.54 no.1 Influence of Milled Powder Particle Size Distribution on the Microstructure and Electrical Properties of Sintered Mn-Zn Ferrites G.R. Chol
  14. Advances in Ceramics;Structure and Properties of MgO and Al₂O₃ Ceramics v.10 Processing of Narrow Distribution Alumina T.R. Gattuso;H.K. Bowen;W.D. Kingery(ed.)
  15. J Am. Ceram. Soc. v.66 no.6 Investigation of Twin in BaTiO₃ Ceramics H. Oppolzer;H. Schmelz
  16. cfi/Ber. DKG v.61 Twinning in BaTiO₃ Ceramics Helmut Schmelz;Helmut Thomann
  17. Science of Ceramics v.12 Anomalous Grain Growth in BaTiO₃ ceramics H. Schmelz;P. Vincenzini(ed.)
  18. J Am. Ceram. Soc. v.52 no.1 Pore-Grain Boundary Interactions and Grain Growth R.J. Brook
  19. Ceramic Microstructure Grain Growth J.E. Burke;R.M. Fulrath(etc. ed.)
  20. J. Appl. Phys v.51 no.11 Microstructure and Normal Grain Growth in Metals and Ceramics. Part 1. Theory S.K. Kurtz;F.M.A. Carpay
  21. J. Am. Ceram. Soc. v.70 no.1 Control of Liquid-Phase-Enhanced Discontinuous Grain Growth in Barium Titanate Detlew F.K. Hennings;R. Janssen;P.J.L. Reynen
  22. Ceramics Today-Tomorrow's Ceramics, part B Materials Science Monographs v.66B Control of Microstructure with Seed Grains D. Hennings;P Vincenzim(ed.)
  23. Introduction to the Principle of Ceramic Processing J.S. Reed
  24. J. Solid State Chem. v.9 Subsolidus Phase Relations in the BaTiO₃-TiO₂ System T. Negas;R.S. Roth;H.S. Parker;D. Minor