Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
권호 표지

A Study on the Preparation of $Al_2O_3-TiO_2$ Nanocomposite Powders

$Al_2O_3-TiO_2$계 Nanocomposite 분체의 합성에 관한 연구

  • 이홍림 (연세대학교 공과대학 세라믹공학과) ;
  • 이호순 (연세대학교 공과대학 세라믹공학과)
  • Published : 1993.02.01
Download PDF
⟨ Previous Next ⟩

Abstract

Transparent Al2O3 and TiO2 clear sols prepared by hydrolysis and subsequent peptization were mixed into wet gel. EDS analysis for this gel showed that wet gel was extremely homogeneous in chemical composition. Calcination of the wet gel at 120$0^{\circ}C$ for 50 minutes resulted in Al2O3-TiO2 nanocomposite powders where TiO2 particles of 101~102 nanometer were dispersed in the Al2O3 matrix. Both powders were sintered for 4 hours in the temperature range over 1500~1$650^{\circ}C$ with and without 5wt% MgO sintering aid. Among these sintered bodies, nanocomposite powder compacts sintered at 1$650^{\circ}C$ for 4 hours with 5wt% MgO showed the most dense structure with the grain size under 5${\mu}{\textrm}{m}$ and highest relative density of 98.2%.

Keywords

References

  1. Br. Ceram. Trans. J. v.88 Aluminium Titanate A Literature Review H.A.J. Thomas;R. Stevens
  2. J. Non. Crysl. Soc. v.100 Al₂O₃-TiO₂and $Al_2TiO_5$ Ceramic Materials by the Sol-Gel Process T. Woignier;P. Lespade;J. Phalippou;R. Rogier
  3. J. Am. Ceram. Soc. v.71 no.12 Correlation Between Grain Size and Thermal Expansion for Aluminum Titanate Materials Fred, J. Parker;Roy W. Rice
  4. J. Mater. Sci. v.25 Aluminium Titanate Formation by the Gas-phase Hydropyrolysis Method W.F. Klandig;H. Mayer
  5. J. Am. Ceram. Soc. v.75 no.6 Enhanced Densification by Seeding of Sol-Gel Derived Aluminum Titanate A.V. Prasadarao(et al.)
  6. J. Mater. Sci. Letters. v.6 Synthesis of Aluminium Titanate-Mullite Composite Having High Thermal Shock Resistance H. Morishima;Z. Kato;K. Uematsu;K.Saito
  7. J. Mater. Sci. v.21 Preparation of Composite Al₂O₃-TiO₂Particles from Organometallic Precursors and Transformation during Heating P.A. Brugger;A. Mocellin
  8. J. Mater. Sci. v.24 Preparation and Sintering of Narrow-Sized Al₂O₃-TiO₂Composite Powders Hiromichi Okamura;Eric A. Barringer;H. Kent Bowen
  9. J. Am. Ceram. Soc. v.74 no.8 Aluminium Titanate Powder Synthesis via Thermal Decomposiltion of Transparent Gels T.V. Mani;H.K. Varma;K.G. Warrier;A.D. Damodaran
  10. J. Mater Sci. v.27 Synthesis and Characterization of Primary Alumina, Titania and Binary Membranes V.T. Zaspalis;W. Van Praag;K. Keizer;J.R.H. Ross;A.J. Burggraaf
  11. J. Am. Ceram. Soc. v.54 no.3 Alumina Sol Preparation from Alkoxides B.E. Yoldas
  12. Ceramics Japan v.26 no.3 平野眞一
  13. J. Mater. Sci. v.20 Hydrous Zirconia Dioxide Interfacial Properties, the Formation of Mono-disperse Spherical Particles and Its Crystallization at High Temperatures M.A. Blesa;A.J.G. Maroto;S.I. Passagio;N.E. Figliolia;G. Rigotti
  14. J. Am. Ceram. Soc. v.70 no.1 Microstructure and Mechanical Properties of Mullite Prepared by the Sol-Gel Method M.G.M.U. Ismail;Z. Nakai;S. Somiya
  15. Surfaces, Interfaces, and Colloids D. Myers
  16. Ultrafine Grain Ceramics Superpasticity in Ceramics P.E.D. Morgan
  17. J. Am. Ceram. Soc v.68 no.9 Coupled Grain Growth Effects in Al₂O₃/10vol% ZrO₂ E.A. Pugar;P.E.D. Morgan
  18. 연세대학교 박사학위 논문 침전법에 의한 Al₂O₃-ZrO₂계 미분계 제조 및 그 소결체의 특성 홍기곤
  19. Mineral Mag. v.43 S.J. Wilson
  20. J. Coll and Inter. Sci. v.82 no.2 S.J. Wilson
  21. CERAMICS, TOWARD THE 21ST CENTURY Nanocomposites and Solid State Epitaxy Two Major Generic Advances in Material Synthesis R. Roy
  22. Ceramics Today-Tomorrow's Cenramics Aluminum titanate Preparation from Non Reactive Alumina G. Aliprandi(et al.)
  23. J. Am. Ceram. Soc. v.70 no.2 Synthesis and Thermal Stability of Aluminum Titanate Solid Solutions M. Ishitsuka;T. Sato;T. Endo;M. Shimata