Synthesis of Silica Aerogel at Ambient Pressure and Characterization (II)

실리카 에어로겔의 상압합성 및 특성연구(II)

  • 권영근 (연세대학교 세라믹공학과) ;
  • 최세영 (연세대학교 세라믹공학과) ;
  • 강신규 (현대전자산업(주))
  • Published : 1999.11.01


Low-density silica gel monolith was synthesized at ambient pressure by surface modification with TMCS and sub-sequent heat treatment. The mechanical thermal and optical properties of gel were studied. Compressive strength and modulus of compression of 350$^{\circ}C$-heated gel with the density of 0.24g/cm3 were 250kPa and 0.2MPa respectively. The thermal conductivity of silica gels synthesized at ambient pressure exhibited 0.02 W/m$.$K for the density of 0.24g/cm3 which is similar to that of the gel via supercritical drying and their main thermal transfer mechanism is considered to be solid and radiation conduction at room temperature. Ambient-dried silica gels were transparent blue showing about 60% of transmittance in the wavelength of 1500-2100nm and typical absorption bands of existing bonds under heat treatment at 350$^{\circ}C$. Medium scale monolity(${\Phi}$=50mm) at ambient pressure could be successfully prepared through total 5-month process period.


  1. J. Am. Ceram. Soc. v.75 no.8 Aerogels J. Fricke;A. Emmerling
  2. Thin Solid Films v.297 no.212-223 Aerogels, Production. Characterization, and Applications J. Fricke;T. Tilotson
  3. 요업학회지 v.33 no.5 초임계 건조에 의한 실리카 에어로겔의 저압 합성 김동준;현상훈
  4. Mat. Res. Soc. Symp. Proc. v.271 no.567-572 Prepartion of Low-Density Aerogels at Ambient Pressure D.M. Smith;R. Deshpande;C.J. Brinker
  5. 요업학회지 v.33 no.12 실리카 에어로겔의 상압합성 및 특성 연구(I) 강신규;최세영
  6. J. Non-Cryst. Solids v.221 no.151-156 Ambient-Dried Low Dielecctric SiO₂Aerogel Thin Film H.S. Yang;S.Y. Choi;S.H. Hyun;H.H. Park
  7. Lett. to Nature v.374 no.439-443 Silica Aerogel Film Prepared at Ambient Pressure by Using Surface Derivatization to Induce Reversible Drying Shrinkage S.S. Prakash;C.J. Brinker
  8. 1st ISA Radiative Heat Transter in Silica Aerogel R. Caps;J. Fricke;J. Fricke(ed.)
  9. 1st ISA Thermal Conductivity of SiO₂-Aerogel Tiles D. Buttner;R. Caps;U. Heinemann;E. Hummer;A. Kadur;P. Scheuerpflug;J. Fricke(eds.)
  10. J. Non-Cryst. Solids. v.186 no.271-277 Theoretical Modeling of Carbon Content to Minimize Heat Transfel in Silica Aerogel S.Q. Zeng;A.J. Hunt;R. Grelf
  11. 과학기술 연구보고서 Thermal Conductivity Measurement Technology for Refractory Materials
  12. Conduction of Heat in Solids (2nd Edition) H.S. Carslaw;J.C. Jaeger
  13. The Structure and Properties of Materials v.3 Mechanical Behavior H.W. Hayden;W.G. Molfatt;J. Wulff
  14. Mat. Res. Soc. Symp. Proc. v.32 no.25-32 A Comparison between The Densification Kinetics of Colloidal and Polymeric Silica Gels C.J. Brinker;W.D. Drotning;G.W. Scherer
  15. J. Am. Ceram. Soc. v.72 no.6 Supereritical Fluid Technologies for Ceramic Processing Application D.W. Matson;R.D. Smith
  16. J. Non-Cryst Solids v.82 no.265-270 Preparation of Dried Monolithic SiO₂Gel Bodies by and Autoclave Process J.G. Van Lerop;A. Huizing
  17. J. Non-Cryst. Solids. v.186 no.321-327 Plastic Behavior of Aerogels under Isostatic Pressure L. Dulfours;T. Woignier;J. Phalippou
  18. J. Non-Cryst. Solids. v.186 no.316-320 Compression of Aerogels G.W. Scherer;D.M. Smith;X. Qiu;J.M. Anderson
  19. J. Non-Cryst. Solids v.125 no.67-75 Organic Aerogels: Microstructure Dependence of Mechanical Properties in Compression R.W. Pekela;C.T. Alviso;J.D. Lemay
  20. The Scattering of Light and Other Electromagnetic Radiation M. Kerker
  21. Light Scattering by Small Particles H.C. Van de Hurst
  22. J. Mater. Sci. v.25 no.3118-3126 Glasses from Aerogels T. Woignier;J. Phalippou;M. Prasas
  23. Sol-Gel Science : The Physics and Chemistry of Sol-Gel Processing C.J. Brinker;G.W. Scherer