Title:
CARBON ELECTRODE AND PRODUCTION METHOD FOR QUARTZ GLASS CRUCIBLE
Document Type and Number:
WIPO Patent Application WO/2019/155837
Kind Code:
A1
Abstract:
The present invention provides a carbon electrode for use in arc discharge for the production of a quartz glass crucible, wherein a recess pattern and/or a protrusion pattern is formed on the surface of the carbon electrode in at least a range of, from a tip portion thereof at which the arc discharge is performed, 50 mm to 130 mm in the longitudinal direction of the carbon electrode. As a result, provided is a carbon electrode on which aggregation of silica fume can be inhibited during production of a quartz glass crucible.
Inventors:
TOMOKUNI KAZUKI (JP)
Application Number:
PCT/JP2019/001172
Publication Date:
August 15, 2019
Filing Date:
January 17, 2019
Export Citation:
Assignee:
SHIN ETSU QUARTZ PROD CO LTD (JP)
International Classes:
C30B29/06; C03B20/00
Foreign References:
| JP2002530258A | 2002-09-17 | |||
| JP2007273206A | 2007-10-18 | |||
| JPH0826759A | 1996-01-30 |
Other References:
See also references of EP 3750854A4
Attorney, Agent or Firm:
YOSHIMIYA Mikio et al. (JP)
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