Dark red transparent refractory glass

Details Dark red transparent refractory glass Dark red transparent refractory glass

1975-06-17

1977-02-08

Lindsay, Jr., Robert L.

Compositions: coating or plastic

Coating or plastic compositions

Marking

65 33, 106 398, 106 52, C03B 3200, C03C 322

Patent

active

040070484

ABSTRACT:
Glass ceramic and the process for producing a dark red glass ceramic comprising the production of basic glass by melting at about 1620.degree. C a mixture of approximate percentages of sand 53.30%, hydrated alumina 27.15%, zirconium silicate 1.90%, titanium oxide 2.02%, lithium carbonate 7.49%, sodium carbonate 0.87%, potash 0.62%, dolomite 0.39%, barium carbonate 1.04%, barium nitrate 2.16%, zinc oxide 1.09%, manganese dioxide 0.56%, ferric oxide 0.21%, cobalt oxide 0.36%, nickel oxide 0.05% and antimony oxide 0.73%. After cooling to about 1480.degree. C, the glass is formed into articles, and the articles further cooled to at least 700.degree. C. The articles are then heat treated to 800.degree. C at about .ltoreq.10.degree. C/min., devitrifying the glass from 800.degree. C to 900.degree. C, at, for example, 0.5.degree. C/min and cooling the article from 890.degree. C to room temperature at, for example, 7.degree. C/min.

REFERENCES:
patent: 3617317 (1971-11-01), Sack et al.
patent: 3642504 (1972-02-01), Petzuld et al.
patent: 3677785 (1972-07-01), Horikawa et al.
patent: 3741740 (1973-06-01), Pirooz
patent: 3749561 (1973-07-01), Kuwayama
patent: 3788865 (1974-01-01), Babcock et al.
patent: 3926839 (1975-12-01), Reade
patent: 3962117 (1976-06-01), Reade

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