Process and device for producing a quartz glass crucible by...

Details Process and device for producing a quartz glass crucible by... Process and device for producing a quartz glass crucible by...

2005-02-08

2005-02-08

Hoang, Tu (Department: 3742)

Industrial electric heating furnaces

Arc furnace device

Indirect

C373S027000

Reexamination Certificate

active

06853673

ABSTRACT:
The present invention provides a process and a device for producing a quartz glass crucible, which generates a stable ring-like arc and is suitable for the production of an excellent crucible having the large open diameter.In a production process and a device for producing a quartz glass crucible, wherein a quartz powder in a mould is heated to be fused by an arc discharge of the electrodes being positioned at around of a rotational axis of a mould,this invention is characterized by using an electrode structure, in which electrodes neighboring each other are positioned at regular intervals in the ring configuration, to form the stable ring-like arc being generated between the electrodes neighboring each other without generating an continuous arc between electrodes facing each other across a central portion of the ring, and heating and fusing a quarts powder.

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Kanda, et al. “Quartz Crucible Production in Mitsubishi Materials Quartz Akita Plant”, Metallurgical Review of MMIJ, vol. 17, No. 1, Jul. 2000.

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