Tube furnace
    2.
    发明专利

    公开(公告)号:GB2192698A

    公开(公告)日:1988-01-20

    申请号:GB8617158

    申请日:1986-07-15

    Applicant: STC PLC

    Abstract: An induction furnace for drawing glass optical fibres from a preform has a R.F. powdered (7) susceptor element comprising a zirconia ring (1) within which the work if heated, located end wise between upper and lower rings (3), e.g. of silica, silicon carbide, alumina, titania, the zirconia ring (1) along its entire length reaching temperatures above any phase change so that the preform and fibre are not contaminated by zirconia particles. The three rings are located inside a tubular-zirconia support 4 and a silica "can" 6.

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