C - Chemistry – Metallurgy – 03 – B
Patent
C - Chemistry, Metallurgy
03
B
49/9, 49/78.1
C03B 37/00 (2006.01) C03B 19/01 (2006.01) C03B 19/12 (2006.01) C03B 37/014 (2006.01) C03B 37/016 (2006.01) C03C 1/00 (2006.01)
Patent
CA 1311127
-17- GLASS BODY FORMED FROM A VAPOR-DERIVED GEL AND PROCESS FOR PRODUCING SAME Abstract The disclosed simple, economical and rapid sol-gel process for forming a silica-based glass body, termed the "vapogel" process, comprises introduction of a silicon halide-containing gas (e.g.,SiCl4 + O2) into an aqueous medium. The thus formed sol can gel within minutes, resulting in a monolithic gel body. This gel body can be dried and consolidated into a glass body or, preferably, be partitioned into particles having a relatively narrow size distribution. The thus formed particles can be used to produce a glass body such as an opticalfiber preform, from which fiber can be drawn. Various techniques for forming theglass body from the gel are disclosed. Among the many advantages of the vapogel method are its ability to produce very homogeneous mixed oxide glasses of composition not obtainable by prior art sol-gel processes, and the advantageous mechanical properties of the gel produced by the method. The latter makes possible, inter alia, formation of particles having a relatively narrow size distribution.
554048
Fleming James William
Pardenek Sandra Alene
American Telephone And Telegraph Company
Kirby Eades Gale Baker
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