| 发明名称 |
HEATING FURNACE FOR GLASS MATERIALS FOR OPTICAL FIBER AND METHOD OF MANUFACTURING SAME. |
| 摘要 |
<p>In heating furnace a porous glass material which consists of fine quartz glass particles, is heat-treated in a fluoride-contg. gaseous atmos. to add fluorine to it and make it transparent and obtain a glass material for optical fibre. Heating furnace has heating elements and a furnace core tube provided on the inner side of the heating elements to isolate the heat atmos. and heating elements from each other. At least the inner layer of the furnace core tube is formed of high-purity carbon.</p> |
| 申请公布号 |
EP0302121(A1) |
申请公布日期 |
1989.02.08 |
| 申请号 |
EP19880901646 |
申请日期 |
1988.02.16 |
| 申请人 |
SUMITOMO ELECTRIC INDUSTRIES LIMITED |
发明人 |
KYOTO, M. YOKOHAMA WORKS OF SUMITOMO EL. IND. LTD;ISHIGURO, Y. YOKOHAMA WORKS OF SUM. EL. IND. LTD.;TAUCHIYA, I. YOKOHAMA WORKS OF SUM. EL. IND. LTD. |
| 分类号 |
C03B37/014;F27B5/10;F27B17/00;F27D1/00 |
主分类号 |
C03B37/014 |
| 代理机构 |
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代理人 |
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| 地址 |
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