Modified zirconia induction furnace
US4533378A · kind A · utility
10Cited by
6References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 28, 1982 |
| Grant date | Aug 6, 1985 |
| Priority date | — |
| Expiry date | May 28, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B2205/70
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A high temperature induction furnace (10) for drawing lightguide fiber (52) from a silica preform (44) has an axially located tubular zirconium dioxide susceptor (34) therein. Prior to use, at least a portion of the inside surface of the susceptor (34) is coated with a vapor deposited silica "soot" (54). The silica soot (54) is then consolidated at an elevated temperature. Surprisingly, such a technique substantially eliminates migration of zirconium dioxide particles from the susceptor (34) to the preform (44) and/or the fiber 52 without deleteriously affecting the susceptor (34) and/or the operation of the furnace (10).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.