Method for the production of objects of quartz-glass by drawing

Details Method for the production of objects of quartz-glass by drawing Method for the production of objects of quartz-glass by drawing

1975-11-10

1977-03-22

Lindsay, Jr., Robert L.

Glass manufacturing

Processes

Operating under inert or reducing conditions

65134, 65136, C03B 516

Patent

active

040134369

ABSTRACT:
A method for the production of quartz glass objects starting from a melt of silicon dioxide in a helium-hydrogen atmosphere. Oxides, hydroxides or other compounds of K, Mg, Ca, Sr and/or Ba are added in a quantity of between 5 and 200.times.10.sup.-.sup.3 mol.%. The quartz glass obtained has consequently considerable fewer trapped gas bubbles.

REFERENCES:
patent: 3764286 (1973-10-01), Antczak et al.
patent: 3850602 (1974-11-01), Bruning

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