Sol-gel process for glass and ceramic articles

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65 17, C03C 300

Patent

active

050232088

ABSTRACT:
An improved sol-gel process is disclosed for fabricating large monoliths of silica or ceramic material, which are substantially free of cracks. Following formation of the gel, but before the gel is dried, the gel is subjected to a hydrothermal aging treatment, in which it is heated in an autoclave to a temperature of between 100.degree. and 300.degree. C., for a time duration of at least about one hour. This hydrothermal aging treatment causes silica (or ceramic) particles to migrate and fill small pores in the porous gel matrix, such that the average pore size increases and capillary forces encountered in the subsequent drying step are reduced to a point where cracking of the gel is substantially eliminated.

REFERENCES:
patent: Re32107 (1986-04-01), January
patent: 4680045 (1987-07-01), Osafune et al.
patent: 4680048 (1987-07-01), Motoki et al.
patent: 4681615 (1987-07-01), Toke et al.
patent: 4707174 (1987-11-01), Johnson, Jr. et al.
patent: 4738896 (1988-04-01), Stevens
patent: 4765818 (1988-08-01), Che et al.
patent: 4767429 (1988-08-01), Fleming et al.
patent: 4775401 (1988-10-01), Fleming et al.
patent: 4776867 (1988-10-01), Onorato et al.
patent: 4786302 (1988-11-01), Osafune et al.
patent: 4786618 (1988-11-01), Shoup
patent: 4801318 (1989-01-01), Toki et al.
patent: 4801399 (1989-01-01), Clark et al.
patent: 4829031 (1989-05-01), Roy et al.
patent: 4839402 (1989-06-01), Stevens
patent: 4840653 (1989-06-01), Rabinovich
patent: 4849378 (1989-07-01), Hench et al.
Iler, Ralph K., The Chemistry of Silica, John Wiley & Sons, 1979.

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