Abnormal Grain Growth Behavior of $BaTiO_3$ Ceramics with Addition of Seed Grains

Seed 입자 첨가에 따른 $BaTiO_3$ 요업체의 비정상 입성장거동

  • 이태헌 (경북대학교 무기재료공학과) ;
  • 김정주 (경북대학교 무기재료공학과) ;
  • 김남경 (경북대학교 무기재료공학과) ;
  • 조상희 (경북대학교 무기재료공학과)
  • Published : 1995.05.01

Abstract

Abnomal grain growth behavior of BaTiO3 ceramics was investigated with addition of seed grains. It was foudn that the nucleation rate of abnormal grain was constant and growth of abnormal grain was linearly increased with sitnering time, regardless of amount of seed grains. These facts were also confirmed by fitting of the volume fraction of abnormal grain vs. sintering time using Avrami type equation (n=4). It was suggested that seed grains did not change the nucleation rate or growth mechanism of abnormal grain but increase the number of abnormal grains at initial stage of sintering and then it led to fine microstructure of BaTiO3 ceramics.

Keywords

$BaTiO_3$ ceramics;Seed grain;Abnormal grain growth;Avrami equation

References

  1. Int. J. High Theh. Ceram. v.3 Barium Titanate Based Ceramic Materials for Dielectric Use Detlew Hennings
  2. Philps Tech. Rev. v.32 no.3/4 Controlling the properties of Electroceramic Materials Through Their Microstructure G.H. Jonker;A.L. Stuijts
  3. 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
  4. 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
  5. Ceramics Today-Tomorrow's Ceramics, par B Materials Science Monographs v.66B Control of Microstructure with Seed Grains D. Hennings;P. Vincenzini(ed.)
  6. 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
  7. Ceramic Transactions;Sintering of Advanced Ceramics v.7 Discontinuous Grain Growth in Multiphase Ceramics D. Kolar;C.A.Handwerker(et.al.)(ed.)
  8. Introduction to Ceramics(2nd Edition) W.D. Kingery(et al.)
  9. 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
  10. J. Am. Ceram. Soc. v.52 no.1 Pore-Grain Boundary Interactions and Grain Growth R.J. Brook
  11. Rates of Phase Transformation R.H. Doremus
  12. Acta Metall. v.13 no.3 On the Theory of Normal and Abnomal Grain Growth M. Hillert
  13. J. Am. Ceram. Soc. v.49 no.7 Numerical Data for Some Commonly Used Solid State Reaction Equation J.H. Sharp;G.W. Brindley;B.N.N. Achar
  14. J. Chem. Phys. v.7 Kinetics of Phase Change. I General Theory M. Avrami
  15. Transformation in Metals serise in Material Science and Engineering P.G. Shewmon
  16. Ceramics and Glasses;Engineered Materials Handbook v.4 Grain Growth S.J. Bennison;S.R. Lampman(etc.)(ed.)
  17. Quantitative Stereology E.E. Underwood
  18. J. Am. Ceram. Soc. v.54 no.471 Exaggerated Grain Growth in Liquid-Phase Sintering of BaTiO₃ Yoshihiro Matsuo;Hiromu Sasaki
  19. J. Solid State Chem. v.9 Subsolidus Phase Relations in the BaTiO₃-TiO₂ System T. Negas;R.S. Roth;H.S. Parker;D. Minor
  20. Advances in Ceramics v.4 Devitrification Kinetics and Microstructures of Rapidly Crystallizing CdGeAs₂Glasses;Nucleation and Crystallization in Glasses R.F. Speyer;S.H. Risbud;J.H. Simmons(etc.)(ed.)
  21. J. Am. Ceram. Soc. v.66 no.6 Investigation of Twin in BaTiO₃ Ceramics H. Oppolzer;H. Schmelz