Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Synthesis of Mullite Powder from Alkoxides and Its Properties

알콕사이드로부터 Mullite분말의 합성 및 그 특성

  • 이홍림 (연세대학교 공과대학 요업공학과) ;
  • 함종근 (한국과학기술연구원 무기재료연구실a)
  • Published : 1989.06.01
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Abstract

A very fine and pure mullite powder of the stoichiometric composition was prepared from aluminium isopropoxide and tetraethylorthosilicate by an alkoxide hydrolysis method using NH4OH as a catalytic agent. The gel powder obtained from the hydrolysis was calcined at 80$0^{\circ}C$ and 125$0^{\circ}C$. The average particle sizes of the powders calcined at 80$0^{\circ}C$ and 125$0^{\circ}C$ were 0.19${\mu}{\textrm}{m}$ and 0.25${\mu}{\textrm}{m}$, respectively. The specific surface areas of the powders calcined at 80$0^{\circ}C$ and 125$0^{\circ}C$ were 114.7$m^2$/g and 20.6$m^2$/g, respectively. The bending strength and fracture toughness of the mullite ceramics sintered at 1$650^{\circ}C$ were 263.1MPa and 2.30MPa.m1/2 respectively.

Keywords

References

  1. J. Am. Ceram. Soc. v.68 no.1 Sintering and Mechanical Properties of Stoichiometric Mullite S. Kanzaki;H. Tabata;T. Kumazawa;S. Ohta
  2. Yogyo-Kyokai-Shi v.93 no.7 Dependency of Mechanical Property of Sintered Mullite on Chemical Composition S. Kanzaki;T. Kumazawz;J. Asami;O. Abe;H. Tabata
  3. J. Am. Ceram. Soc. v.65 no.9 Development of Low-Thermal Expansion Mullite Bodies Martin H. Leipold;Jack D. Sibold
  4. Introduction to Ceramics W.D. Kingery;H.K. Bowen;D.R. Uhlman
  5. J. Am. Ceram. Soc. v.58 no.3-4 Creep of Polycrystalline Mullite P.A. Lessing;R.S. Gordon;K.S. Mazdiyasni
  6. J. Am. Ceram. Soc. v.60 no.3-4 High-Temperature Mechanical Properties of Mullite under Compression P.C. Dokko;J.A. Pask;K.S. Mazdiyasni
  7. Yogyo-Kyokai-Shi v.93 no.9 Preparation of Fine SiO₂-Al₂O₃ Powders by Hydrolysis of Mixed Alkoxides Y. Hirata;K. Sakeda;Y. Matsushita;K. Shimada
  8. Yogyo-Kyokai-Shi v.96 no.1 Preparation of Ultra-Fine Mullite Powder from Metal Alkoxides H. Suzuki;Y. Tomokiyo;Y. Suyama;H. Saito
  9. J. Am. Ceram. Soc. v.70 no.10 Effect of Sol-Gel Mixing on Mullite Microstructure and Phase Equilibria in α-Al₂O₃-SiO₂ System J.A. Pask;X.W. Zhang;A.P. Tomsia;B.E. Yoldas
  10. Yogyo-Kyokai-Shi v.96 no.6 Preparation of Mullite Powders from Metal Alkoxides by Ultrasonic Spray Pyrolysis O. Sakurai;N. Mizutani;M. Kato
  11. Yogyo-Kyokai-Shi v.71 no.11 Synthesis and 980℃ Phase Development of Some Mullite Gels A.K. Chakravorty;D.K. Ghosh
  12. Am. Ceram. Soc. Bull. v.64 no.12 Sol-Gel Processing of Ceramics and Glass D.W. Johnson
  13. J. Kor. Ceram. Soc. v.24 no.1 Synthesis of Powder of the System Si-Al-O-N from Alkoxides H.L. Lee;Y.C. Yoo
  14. J. Non-Crystalline Solids v.48 History and Principles of the Sol-Gel Process, and Some New Multicomponent Oxide Coatings H. Dislich;P. Hinz
  15. J. Am. Ceram. Soc. v.59 no.7-8 Fracture Toughness Determination by Indentation A.G. Evans;E.A. Charles
  16. J. Am. Ceram. Soc. v.62 no.3-4 Formation of Silicon Aluminium Spinel A.K. Chakraborty
  17. J. Am. Ceram. Soc. v.55 no.2 Infrared Frequency Calculations for Ideal Mullite(3Al₂O₃·2SiO₂) K.J.D. Mackenzie
  18. Ceramic Materials and Components for Engines Mechanical Properties of Pressureless Sintered Mullite Ceramics S. Kanzaki;O. Abe;M. Ohashi;H. Tabata;W. Bunk;H. Hausner
  19. Yogyo-Kyokai-Shi v.96 no.1 Influence of Chemical Composition on the Mechanical Properties of SiO₂-Al₂O₃ Ceramics T. Kumazawa;S. Kanzai;S. Ohta;H. Tabata