C - Chemistry – Metallurgy – 03 – B
Patent
C - Chemistry, Metallurgy
03
B
C03B 37/012 (2006.01) C03B 5/06 (2006.01) C03B 19/02 (2006.01) C03B 37/023 (2006.01) C03C 3/32 (2006.01)
Patent
CA 2086540
Halide glass articles, e.g.rods, tubes and preforms for making fluoride glass fibres, are prepared by melting and/or casting the articles under a low pressure, e.g. 0.01 to 500 mbars and, during the low pressure regime, a gas flow rate of between 0.01 to 100 litres/min (measured at NTP) is maintained. It has been found that subjecting the melts to a low pressure reduces the attenuation of the fibre which eventually results from the melts.
Des articles de verre aux halogénures, p. ex. des tiges, des tubes et des préformes pour faire des fibres de verre aux fluorures, sont préparés par fusion et/ou moulage sous faible pression, p. ex. 0,01 à 500 mbars, et durant le régime à faible pression, on maintient un débit de gaz compris entre 0,01 et 100 litres par minute (mesuré à température et pression normales). On a constaté que de soumettre les produits de fusion à une faible pression réduisait l'atténuation de la fibre qui résulte éventuellement de la fusion.
Carter Steven Fitzgerald
France Paul William
Williams John Richard
British Telecommunications Public Limited Company
Gowling Lafleur Henderson Llp
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