Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
권호 표지

A Study on the Preparation and Characterization of $TiO_2-SiO_2$ Aerogels by Supercritical Drying

Supercritical Drying에 의한 $TiO_2-SiO_2$ 이성분계 Aerogel의 제조 및 그 특성분석

  • 김창은 (연세대학교 세라믹공학과) ;
  • 이종혁 (연세대학교 세라믹공학과) ;
  • 김구대 (한국과학기술연구원 세라믹스연구부) ;
  • 이해욱 (가야요업대학 전자세라믹공학과)
  • Published : 1994.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

TiO2-SiO2 homogeneous sol was prepared by means of complexing titanium iso-propoxide with acetylacetone. Crack-free, monolithic binary TiO2-SiO2 aerogels were obtained by evacuating the solvent under the pressure of 2,200 psi at 28$0^{\circ}C$, which was determined as a supercritical condition. The microstructure of the binary aerogels was observed to be finer and more homogeneous as the Ti content decreased. The microstructure was related to the optical transition of aerogels from opaque to transluscent.

Keywords

References

  1. Better Ceramics Through Chemistry II Difference between Gel-derived Melts and those Produced by Batch Melting A.R Cooper;C.J. Brinker(ed.);D.E. Clark(ed.);D.R. Ulrich(ed.)
  2. Sol-Gel Science and Technology J. Livage;M.A. Aegerters;M. Jafel icci Jr.;D.F. Souza;E.D. Zomotto
  3. J. Non-Cryst. Solids v.100 Precursor for Sol-Gel Preparation M. Gulielmi;G. Carturan
  4. J Non-Cryst Solids Attempls to Avoid Cracks During Drying T Mizuno;H. Nagata;S. Manabe
  5. Electron. Lett. v.22 Radial Gradient Refractive-Index Glass Rods Prepared by a Sol-Gel Method K. Shingyouchi;S. Konishi;K. Susa;I. Matsuyama
  6. J. Non-Cryst Solids v.100 Gradient Index Glass Rods of $PbO-K_2O-B_2O_3-SiO_2$ System Prepared by the Sol-Gel Process M. Yamane;H. Kawazoe;A. Yasumori;T. Takaashi
  7. J. Non-Cryst. Solids v.121 Synthesis of Alumina Coating from Chelated Aluminium Alkoxide Rudiger Nass;Helmut Schmidt
  8. J. Non-Cryst. Solids v.100 r-GRIN Glass Rods Prepared by a Sol-gel Method S. Komishi;K. Shingyouchi;A. Makishima
  9. J Am. Cer. Soc. v.48 no.11 Infrared Absorption Spectrum of Silicon Dioxide R. Hanna
  10. J. Physical Chemistry v.61 The Infrared Spectra of Some Ti-O-Si, Ti-O-Ti and Si-O-Si Compounds V.A. Zeither;C.A. Brown
  11. J Non-Cryst. Solids v.145 Synthesis and Characterization of Mullite Aerogels T. Heinrich;F. Raether;W. Tappert;J. Fricke
  12. J. Am Chem Soc. v.62 On a Theory of Van der Waals Adsorption of Gases S. Brunauer;L.S. Deming;W.S. Deming;E. Teller
  13. Better Ceramics Trough Chemistry II Fluorine in Silica Gels C.C. Lin;J.D. Basil;C.J. Brinker(ed.);D.E. Clark(ed.);D.R. Ulrich(ed.)