Two chamber reaction furnace

Patent · Tue May 05 00:00:00 EDT 1998

OSTI ID:871523

Blaugher, Richard D ^[1]

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1. Evergreen, CO

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.

• Research Organization: Midwest Research Institute
• DOE Contract Number: AC36-83CH10093
• Assignee: Midwest Research Institute (Kansas City, MO)
• Patent Number(s): US 5747099
• Application Number: 08/583341
• OSTI ID: 871523
• Country of Publication: United States
• Language: English

Related Subjects

/427/118/505/
700
800
950
admitting
ambient
ambient atmosphere
annealing
annealing temperature
atmosphere
barium-calcium-copper
barium-calcium-copper oxide
bcco
chamber
chamber disposed
chamber reaction
comprises
continuously
continuously moving
conveyed
conveying
conveyor
copper oxide
create
degree
deposit
deposition
diffusion
disposed
effectuate
effectuates
furnace
furnace comprises
gas
gas inlet
heating
heating means
importance
independently
independently operable
inlet
inlet means
long-length
lost
means
moving
operable
oxide
particular
partition
permeable
precursor
process
product
production
provides
reactant
reaction
reaction furnace
replace
simultaneous
single-step
single-step process
step process
superconducting
tape
tapes
tbcco
temperature
thallinating
thallium
thallium oxide
thallium-barium-calcium-copper
thallium-barium-calcium-copper oxide
upper
upper chamber
vapor
vaporized
vertical
wire
wires