High temperature furnace muffle

Details High temperature furnace muffle High temperature furnace muffle

1976-05-24

1977-06-28

Camby, John J.

Heating

Work chamber having heating means

Work chamber having gaseous material supply or removal...

432208, 432242, F27B 518, F27B 502

Patent

active

040322904

ABSTRACT:
A muffle seal for a high temperature furnace in which a quartz or similar muffle is attached to an associated metal structure to provide substantial sealing of gas in the muffle even at extremely high operating temperatures. As employed in a multi-zone furnace having a high temperature quartz muffle section and a lower temperature metal muffle section joined thereto via a gas or gas and heat barrier, the quartz muffle is joined to the barrier by a peripheral chamber provided around the end of the quartz muffle confronting the barrier, the chamber being sealed to surfaces of the muffle and the barrier by porous gaskets. A sealing gas is introduced at above atmospheric pressure to the peripheral chamber, the gas being controllably transmitted through the porous gaskets to provide isolation against leakage of gas within the quartz muffle. The novel seal can also be employed to join quartz and metal muffle sections without a barrier therebetween.

REFERENCES:
patent: 3625496 (1971-12-01), Bornor

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