Method for manufacturing tube-shaped silica glass product
AssigneeSamsung Electronics Co., Ltd.
InventorsYoung-Sik Yoon, Young-Min Baik
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Abstract
A silica product, method and apparatus for manufacturing a tube-shaped silica glass product using a molded green body having a hollow rod structure. A molded green body having a hollow rod structure has a uniform outer diameter and has a bore having an inner diameter increasing gradually from one end to the other. When sintered in a vertically movable sintering furnace, a tube-shaped silica glass product having a longitudinal cross section distribution less than a tolerance limit may be obtained. Optical fiber manufactured using the silica glass tube according to the present invention may have a uniform longitudinal geometrical structure, thereby exhibiting superior transmission characteristics.
Claims11
A method of making a glass product, comprising the steps of:
- molding a silica sol in the form of a tube having a cylindrical outer surface and having a bore with an inner diameter which increases gradually from one end of the tube to the other end;
- gelating the sol and treating the gelated sol to form a molded green body;
- positioning the molded green body vertically with the end having the larger inner diameter downward;
- and
- zone-sintering the molded green body to yield the glass product by using a sintering furnace moving downward relative to the molded green body.
Dependencies are inferred from the claim text.