Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Dispersion of Silicon Nitride Particles and Sintering Additives of AlN and Nd$_2$O$_3$ in Nonaqueous Suspending Media

비수계분산매체에서 질화규소와 소결첨가제 AlN 및 Nd$_2$O$_3$의 분산

  • 김재원 (창원대학교 세라믹공학과) ;
  • 백운규 (창원대학교 세라믹공학과) ;
  • 윤경진 (표준과학연구원 소재특성평가센터)
  • Published : 1999.02.01
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Abstract

The fundamental dispersion property of Si2N4 and a combination of AlN and Nd2O3 as sintering additives in a variety of organic solvents such as alcohols, hydrocarbons, ketones, and ethers was investigated. The stabilization mechanism and interaction between organic functional groups of the various organic additives were studied to clarify the dispersibility of the ceramic particles in the nonaqueous suspending medium. characterization of the suspensions was based mainly on electrokinetic sonic amplitude(ESA) measurements and the flow curves obtained from the rheological studies as well as estimated Hamaker constants. It was found that the contribution of electrostatic repulsive forces to the Si3N4, AlN and Nd2O3 stabilization in organic media is appreciably greater than anticipated and is dependent on the physicochemical properties of organic solvents.

Alcohols, hydrocarbons, ketones 그리고 ethers와 같은 다양한 유기용매에서 질화규소 및 소결첨가제로 사용되는 AlN, Nd2O3 입자의 분산특성을 연구하였다. 분산안정화기구 및 유기공정첨가제와의 상호작용에 관한 연구를 수행하여 비수계 시스템에서 세라믹 입자의 분산성을 규명하였다. 현탁액의 물성특성은 산술된 Hamaker 상수 뿐 아니라 electrokinetic sonic amplitude 측정 및 유동학적 결과로부터 얻어진 흐름곡선을 이용하여 평가하였다. 유기용매 내에서 Si3N4, AlN 그리고 Nd2O3 분산안정화에 기여하는 정전기적 척력은 예상보다 컸으며, 이것은 유기용매의 물리화학적 특성에 의존함을 알 수 있었다.

Keywords

References

  1. Nitrogen Ceramics F. L. Riley(Ed.)
  2. J. of Mat. Sci. v.32 Study on the Structure of N-containing Melilite $Y_2Si_3O_3N_4\;and\;Nd_2Si_25Al0.5O_35N_35$ P. L. Wang;P. E. Werner
  3. J. of Am. Ceram. Soc. v.78 no.3 Reaction Densification of α‘-SiAlON;Ⅰ, Acid-Base Reactions M. Menon;I-Wei Chen
  4. J. Am. Ceram. Soc. v.66 no.6 Processing-Rclated Fracture Origins;Ⅱ. Agglomerate Motion and Cracklike Internal Surfaces Caused by Differential Sintering F. F. Lange;M. Metcalf
  5. J. Am. Ceram. Soc. v.80 no.7 Aqueous Processing of Sintered Reaction-Bonded Silicon Nitride. Ⅰ. Dispersion Properties of Silicon Powder V. A. Hackley;U. Paik;B. Kim;S. G. Malghan
  6. J. Mat. Sci. v.22 Organotitanate Dispersants for BaTiO₃and Al₂O₃ R. R. Landham;M. V. Parish;H. K. Bowen
  7. Ceram. Int. v.19 Dispersion of Alumina and Silica Powders in Non-aqueous Media;Mixed Solvent Effects B. I. Lee;U. Paik
  8. Advances in Ceramics v.21 Ceramic Powder Dispersion in Non-aqueous Systems R. E. Johnson, Jr.;W. H. Morrison, Jr;G. L. Messing(ed.);K. S. Mazdiyasni(ed.);J. W. McCauley(ed.);R. A. Haber(ed.)
  9. Am. ceram. Soc. Bull v.65 Fish Oil and Triglyeerides as Dispersant for Alumina P. D. Calvert;E. S. Tormey;R. L. Pober
  10. Colloids Surf. A. v.135 The Effect of Electrostatic Repulsive Forces on the Stability of BaTiO₃ Particles Suspened in Non-aqueous Media U. Paik;V. A. Hackley;S Choi;Y. Jung
  11. Colloids Surf. v.29 Non-aqueous dispersion properties of pure barium titanate for tape casting K. Mikcska;W. R. Cannon
  12. J. Am. Ceram. Soc. v.72 no.1 Powder Processing Science and Technology for Increased Reliability F.F. Lange
  13. J. Mat. Sci. v.27 Effect of Aminosilane on the Rheology of Silica Powders in Nonaqueous Media B. I. Lee;U. Paik
  14. Am. Ceram. Soc. Bull. v.65 Making Thin, Flat Ceramics;A Review E. P. Hyatt
  15. Stabilization of Colloidal Dispersion by Polymer Adsorption T. Sato;R. Ruch
  16. J. Coll. Inter. Sci. v.68 Non-aqueous Silica Dispersions Stabilized by Terminally-Grafted Polystyrene Chains K. Bridges;D. Fairburst;B. Vincent
  17. Ind. Eng. Chem., Prod. Res. Dev. v.17 Acid-Base Interactions in Polymer Adsorption F. M. Fowkes;M. A. Mostafa
  18. Handbook on Ultrasonic and Dielectric Characterization Techniques for Suspended Particulates Electroacoustic Analysis in Processing of Advanced Ceramics V. A. Hackley;U. Paik;V. A. Hackley(ed.);J. Texter(ed.)