Batteries: thermoelectric and photoelectric – Thermoelectric – Having housing – mounting or support
Patent
1992-12-11
1994-03-29
Walsh, Donald P.
Batteries: thermoelectric and photoelectric
Thermoelectric
Having housing, mounting or support
136234, 136242, H01L 3502
Patent
active
052980847
ABSTRACT:
A high-voltage electrical insulator (21) for electrically insulating a thermoelectric module (17) in a spacecraft from a niobium-1% zirconium alloy wall (11) of a heat exchanger (13) filled with liquid lithium (16) while providing good thermal conductivity between the heat exchanger and the thermoelectric module. The insulator (21) has a single crystal alumina layer (SxAl.sub.2 O.sub.3, sapphire) with a niobium foil layer (32) bonded thereto on the surface of the alumina crystal (26) facing the heat exchanger wall (11), and a molybdenum layer (31) bonded to the niobium layer (32) to act as an oxygen permeation barrier to preclude the oxygen depleting effects of the lithium from causing undesirable niobium-aluminum intermetallic layers near the alumina-niobium interface.
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J. D. Selle and J. H. DeVan, "The Reduction of Al.sub.2 O.sub.3 in Niobium-Lithium Systems at 1000.degree. C." Oak Ridge National Laboratory report ORNL/TM-5828; Chem. Abst. 88:139, 927t (1977), published Jul. 1977, pp. 1-17.
Bond James A.
Van der Beck Roland R.
Carroll Chrisman D.
Gaither Roger S.
Moser William R.
The United States of America as represented by the United States
Valdes Miguel A.
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