04221825 is referenced by 35 patents and cites 10 patents.

The present invention relates to a process for the continuous manufacture of vitreous synthetic silica doped with fluorine. This process consists of decomposing a silicon compound free of hydrogen in the flame of an inductive plasma burner, thereby forming silica upon reacting with the oxygen contained in the burner feed gas. A gaseous inorganic fluorine compound free of hydrogen, is sent into the flame preferably from outside the burner. Said fluorine compound simultaneously with the silicon compound decomposes whereby fluorine is introduced into the silica, lowering its index of refraction. The doped silica is then deposited on a heat-stable support in the form of a vitreous mass. The doped synthetic silica is particularly useful for making preforms for optical transmission fibers.

Title
Continuous production of synthetic silica doped with fluorine
Application Number
6/58471
Publication Number
4221825
Application Date
July 18, 1979
Publication Date
September 9, 1980
Inventor
Andre Ranson
Rueil-Malmaison
FR
Pierre Guerder
Pithiviers
FR
Agent
Pennie & Edmonds
Assignee
Saint Gobain
FR
IPC
G02B 1/10
C03C 25/02
C03C 17/02
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