Method of conforming clear vitreous gal of silica-titania materi

Details Method of conforming clear vitreous gal of silica-titania materi Method of conforming clear vitreous gal of silica-titania materi

1980-02-08

1981-07-14

McCarthy, Helen M.

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

65DIG14, 106 52, 264 61, C03C 304

Patent

active

042786320

ABSTRACT:
Method for forming clear vitreous material substantially comprising silica-titania binary which contains up to about 40 mole percent titania without melting the constituents used in forming the material. There is separately prepared a clear organic-solvent-solution of partially hydrolyzed alkoxide of one of the binary members. To this prepared solution is added the other binary member either in the form of alkoxide or a clear organic-solvent solution of partially hydrolyzed alkoxide of the other member. The mixed solutions are reacted and additional water is added as required to complete the hydrolysis of the alkoxide. The resulting product is dried and then heated at a relatively low temperature to evolve residual organic components. The binary vitreous material can be processed into monolithic silica-titania glass bodies, or silica-titania coatings for substrates, or into silica-titania vitreous powder which can be sintered into glass bodies or which can be melted at a lower temperature than normally required to form silica-titania glass.

REFERENCES:
patent: 3640093 (1972-02-01), Levene
patent: 3791808 (1974-02-01), Thomas
patent: 3811918 (1974-05-01), Levene
Yoldas, B. E. "Preparation of Glasses and Ceramics from Metal-Organic Compounds" J. of Mat. Sci.-12 (1977) pp. 1203-1208.

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