Zirconia induction furnace

Details Zirconia induction furnace Zirconia induction furnace

C - Chemistry, Metallurgy

03

B

49/8

C03B 37/027 (2006.01) C03B 5/02 (2006.01) C03B 37/029 (2006.01) H05B 6/02 (2006.01)

Patent

CA 1187290

-10- ZIRCONIA INDUCTION FURNACE Abstract A high frequency induction furnace for reflowing a portion of a lightguide preform in order to draw a fiber therefrom. The furnace has a centrally located tubular susceptor therein having a thin coating of the preform material (e.g., silica) on at least a portion of the inside surface thereof. A cylinder is positioned in concentric, spaced relation about the susceptor and is surrounded by an insulating grain. A high frequency coil is energized to couple its electromagnetic field to the susceptor to heat and reflow a portion of the preform in order to draw the fiber therefrom. The thin coating prevents contaminating particulates from migrating from small cracks in the inside surface of the susceptor onto the preform while the cylinder prevents small particulate emanating from the insulating grain from being drawn through larger cracks in the susceptor and onto the preform and/or the fiber 52.

426827

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