Process for the production of an optical glass article

Details Process for the production of an optical glass article Process for the production of an optical glass article

1981-09-11

1984-03-13

Schor, Kenneth M.

Glass manufacturing

Processes

With shaping of particulate material and subsequent fusing...

65 17, 501 12, C03B 1906

Patent

active

044365420

ABSTRACT:
The present invention relates to a process for the production of an optical glass article, which comprises immersing a gelled body containing a compound capable of being converted into a dopant for increasing the refractive index of the glass, in a leaching liquor selected from the group consisting of water, aqueous solutions of weak acids, aqueous solutions of alkali metal salts, ketones and alcohols, leaching at least a part of the compound as ions out of the gelled body, optionally immersing the gelled body in an organic solvent, drying the body in a predetermined atmosphere, decomposing the compound, heating and firing the body at a high temperature and then heating and sintering it at a higher temperature.

REFERENCES:
patent: 3843228 (1974-10-01), Yoshiyagawa et al.
patent: 4059658 (1977-11-01), Shoup et al.
patent: 4220461 (1980-09-01), Samanta
patent: 4239519 (1980-12-01), Peall et al.
patent: 4278632 (1981-07-01), Yoldas
patent: 4302231 (1981-11-01), Macedo et al.
patent: 4326869 (1982-04-01), Kurosaki et al.

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