Sol-Gel Processing of Net Shape Silica Optics

  • L. L. Hench
  • J. L. Noguès
Part of the The Springer International Series in Engineering and Computer Science book series (SECS, volume 259)


The objective of this chapter is to summarize the advantages in sol-gel processing of net silica optics. The advantages discussed include: homogeneity, purity, coefficient of thennal expansion, optical transmission, as-cast shapes and surface features, and the unique properties of porous silica matrices used for doping applications and laser-enhanced densification.

The potential disadvantages of sol-gel processing are inherent to size scaleup. They can be overcome by well-defined processing steps including: control of gel texture through hydrolysis, condensation and aging reactions, control of drying, elimination of casting defects, and precise atmosphere control.


Fuse Quartz Silica Monolith Silicon Tetrachloride Binary Optic Silica Optic 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. [1]
    Bruckner, R., 1990, “Properties and Structure of Vitreous Silica,” J. NonCryst. Solids, 5, 123–175.CrossRefGoogle Scholar
  2. [2]
    Grayson, M., ed., 1985, Encyclopedia of Glass, Ceramics, Clays and Cement, Wiley, New York.Google Scholar
  3. [3]
    Hench, L. L., Wang, S., and Noguès, J. L., 1988, “Gel-Silica Optics,” Multifunctional Materials, Vol. 878, Robert L. Gunshor, ed., SPIE, Bellingham, WA, pp. 76–85.CrossRefGoogle Scholar
  4. [4]
    O’Shaughnessy, R. P., et al., 1987, “Joint Precision Optics Technical Group’s Final Report,” Department of Defense’s Joint Logistics Commands, Precision Optics Study.Google Scholar
  5. [5]
    Noguès, J. L. and LaPaglia, A. J., 1989, “Processing, Properties and Applications of Sol-Gel Silica Optics,” Current Developments in Optical Engineering and Commercial Optics, Vol. 1168, R. E. Fischer, H. M. Pollicove, and W. J. Smith, eds., SPIE, Bellingham, WA, pp. 61–73.CrossRefGoogle Scholar
  6. [6]
    Wolpert, H. D., 1990, “Optical Plastics: Properties and Tolerances,” The Photonics Design and Applications Handbook.Google Scholar
  7. [7]
    Hench, L. L. and West, J. K., 1990, “The Sol-Gel Process,” Chem. Rev., 90, 33–72.CrossRefGoogle Scholar
  8. [8]
    Shoup, R. D., 1988, “Complex Fused Silica Shapes by a Silica Gelation Process,” Ultrastructure Processing of Advanced Ceramics, J. D. Mackenzie and D. R. Ulrich, eds., Wiley, New York, pp. 347–354.Google Scholar
  9. [9]
    Vasconcelos, W. L., DeHoff, R. T. and Hench, L. L. (1990) “Structural Evolution During Sintering of Optical Sol-Gel Silica,” J. Non-Crystalline Solids 121, 124–127.CrossRefGoogle Scholar
  10. [10]
    Wilson, M.J.R. and Hench, L. L., 1992, “Real Time Monitoring of Silica Gel Drying Behavior,” Ultrastructure Processing of Advanced Materials, D. R. Uhlmann and D. R. Ulrich, eds., Wiley, New York, pp. 247–254.Google Scholar
  11. [11]
    Hench, L. L., Wilson, M.J.R., Balaban, C. and Noguès, J. L., 1992, “Sol-Gel Processing of Large Silica Optics,” Ultrastructure Processing of Advanced Materials, D. R. Uhlmann and D. R. Ulrich, eds., Wiley, New York, pp. 159–177.Google Scholar
  12. [12]
    West, J. K., Wallace, S, Hench, L. L. and Lishawa, C. R., 1992, “Quantum Calculations on Sol-Gel Silica Clusters,” Ultrastructure Processing of Advanced Materials, D. R. Uhlmann and D. R. Ulrich, eds., Wiley, New York, pp. 111–118.Google Scholar
  13. [13]
    Noguès, J. L. and Howell, R. L., 1992, “Fabrication of Pure Silica Micro-Optics by Sol-Gel Processing,” Proceedings of SPIE Sol-Gel Optics II Symposium, San Diego, CA.Google Scholar
  14. [14]
    Noguès, J. L. and Moreshead, W. V., 1990,J. Non-Cryst. Solids, 121, 136–142.CrossRefGoogle Scholar
  15. [15]
    Noguès, J. L., Majewsi, J. K., Walker, M., Bowen, R., Wojcik, R. and Moreshead, W. V., 1988, J. Am. Ceram. Soc., 71, 1159.CrossRefGoogle Scholar
  16. [16]
    Chia, T., West, J. K. and Hench, L. L., 1992, “Fabrication of Microlenses by Laser Densification on Gel-Silica Glasses,” Chemical Processing of Advanced Materials, L. L. Hench and J. K. West, eds., Wiley, New York, pp. 933–939.Google Scholar

Copyright information

© Springer Science+Business Media New York 1994

Authors and Affiliations

  • L. L. Hench
    • 1
    • 2
  • J. L. Noguès
    • 1
    • 2
  1. 1.Department of Materials Science and EngineeringUniversity of FloridaGainesville
  2. 2.Geltech IncTwo Innovation DriveAlachua

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