High temperature furnace

Details High temperature furnace High temperature furnace

1975-09-15

1976-08-03

Envall, Jr., R. N.

Electric heating

Microwave heating

Tunnel furnace

13 25, 13 24, 219121EB, H05B 716

Patent

active

039730751

ABSTRACT:
A high temperature furnace for use above 2000.degree.C is provided that features fast initial heating and low power consumption at the operating temperature. The cathode is initially heated by joule heating followed by electron emission heating at the operating temperature. The cathode is designed for routine large temperature excursions without being subjected to high thermal stresses. A further characteristic of the device is the elimination of any ceramic components from the high temperature zone of the furnace.

REFERENCES:
patent: 2971039 (1961-02-01), Westeren
patent: 3368022 (1968-02-01), Mescher et al.
patent: 3621324 (1971-11-01), Fink
patent: 3644655 (1972-02-01), Vollmer
patent: 3668293 (1972-06-01), Hellwig

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