Title:
石英ガラス溶融用カーボン電極
Document Type and Number:
Japanese Patent JP4290291
Kind Code:
B2
Abstract:
The invention is to offer such a carbon electrode of less consumption and a long useful life and a method of fabricating the same which prevents particles from falling from carbon electrodes into a melting quartz glass, checks occurrence of bubbles in the quartz glass, and avoids lowering of single crystallizing yield by bubbles existing in a transparent layer formed in the vicinity of an inside surface of a quartz glass crucible when lifting silicon single crystal by using the quartz glass crucible made by using the carbon electrodes. The carbon electrode to be used for melting quartz glass by an arc discharge, is characterized in that an electrode material is composed of carbon of bulk density being 1.80 g/cm3 or higher and a three-point bending strength being 35 MPa or higher.
Inventors:
Hirotaka Hagiwara
Takamori Mori
Atsuro Miyao
Kiyoaki Misu
Shinya Agatsuma
Shunichi Suzuki
Takamori Mori
Atsuro Miyao
Kiyoaki Misu
Shinya Agatsuma
Shunichi Suzuki
Application Number:
JP27881399A
Publication Date:
July 01, 2009
Filing Date:
September 30, 1999
Export Citation:
Assignee:
Covalent Materials Co., Ltd.
International Classes:
C03B20/00; C03B19/09; C04B35/52; C04B35/532; C30B29/06; H05B3/03; H05B7/06; H05B7/07
Domestic Patent References:
| JP10203869A | ||||
| JP11236233A | ||||
| JP834628A | ||||
| JP1270577A | ||||
| JP2283667A | ||||
| JP5229810A | ||||
| JP4228412A |
Attorney, Agent or Firm:
Hisashi Hatano
Shunguchi Sekiguchi
Shunguchi Sekiguchi