Vertical two chamber reaction furnace

Details Vertical two chamber reaction furnace Vertical two chamber reaction furnace

1998-01-13

1999-03-16

Bueker, Richard

Coating apparatus

Gas or vapor deposition

Running length work

118719, 118724, 118725, C23L 1600

Patent

active

058824120

ABSTRACT:
A vertical two chamber reaction furnace. The furnace comprises a lower chamber having an independently operable first heating means for heating the lower chamber and a gas inlet means for admitting a gas to create an ambient atmosphere, and an upper chamber disposed above the lower chamber and having an independently operable second heating means for heating the upper chamber. Disposed between the lower chamber and the upper chamber is a vapor permeable diffusion partition. The upper chamber has a conveyor means for conveying a reactant there through. Of particular importance is the thallinating of long-length thallium-barium-calcium-copper oxide (TBCCO) or barium-calcium-copper oxide (BCCO) precursor tapes or wires conveyed through the upper chamber to thereby effectuate the deposition of vaporized thallium (being so vaporized as the first reactant in the lower chamber at a temperature between about 700.degree. and 800.degree. C.) on TBCCO or BCCO tape or wire (the second reactant) at its simultaneous annealing temperature in the upper chamber of about 800.degree. to 950.degree. C. to thereby replace thallium oxide lost from TBCCO tape or wire because of the high annealing temperature or to deposit thallium on BCCO tape or wire. Continuously moving the tape or wire provides a single-step process that effectuates production of long-length TBCCO superconducting product.

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patent: 5175140 (1992-12-01), Fujita
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patent: 5360646 (1994-11-01), Morita
patent: 5403819 (1995-04-01), Makamura
patent: 5480861 (1996-01-01), Tanaka

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