Thermally stable quartz glass

Details Thermally stable quartz glass Thermally stable quartz glass

1978-03-16

1979-12-25

Vertiz, O. R.

Compositions: coating or plastic

Coating or plastic compositions

Marking

106 50, 106 52, C03C 1300, C03C 322, C03C 304

Patent

active

041804090

ABSTRACT:
Quartz glass of high thermal stability is produced from a SiO.sub.2 solution or sol which is substantially free of alkali and alkaline earth metal oxides and contains chromium and/or manganese in about 0.05 to 20% by weight of the SiO.sub.2 expressed as Cr.sub.2 O.sub.3 and Mn.sub.2 O.sub.3. The quartz glass upon heating above 1100.degree. C. forms cristobalite having an average crystallite size of about 100 to 500 A. Articles therefrom retain their physical and mechanical properties at high temperatures. The materials are suited for producing fibers by the usual methods of spinning from solutions or sols and, as such, or as fibers they are suited for use in reinforcement and insulation and in making flameproof textiles.

REFERENCES:
patent: 3007806 (1961-11-01), Hartwig
patent: 3385915 (1968-05-01), Hamling
patent: 3776809 (1973-12-01), Baumler
patent: 3821070 (1974-06-01), Mansmann et al.
patent: 3846527 (1974-11-01), Winter et al.
patent: 4010233 (1977-03-01), Winter et al.

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