Electric heating – Metal heating – By arc
Patent
1992-03-30
1993-10-26
Paschall, Mark H.
Electric heating
Metal heating
By arc
21912138, 21912152, 21912148, 423335, B23K 900
Patent
active
052568555
ABSTRACT:
Method for the production of fused silica in which a particulate silica feedstock material is passed from a silica feed tube through or near a plasma arc coupling zone in which at least two plasma arcs of opposite polarity are coupled, thereby raising the temperature of the feedstock material and collecting the material as fused silica.
REFERENCES:
patent: 3899573 (1975-08-01), Shaw et al.
patent: 3989512 (1976-11-01), Sayce
patent: 4048348 (1977-09-01), Bailey et al.
patent: 4481636 (1984-11-01), Curr et al.
Fukunishi Takumi
Heanley Charles P.
Matsuoka Takao
Williams John K.
Nippon Silica Glass Co., Ltd.
Paschall Mark H.
Tetronics Research & Development Co. Ltd.
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