Batteries: thermoelectric and photoelectric – Thermoelectric – Having housing – mounting or support
Patent
1985-09-12
1988-01-26
Yasich, Daniel M.
Batteries: thermoelectric and photoelectric
Thermoelectric
Having housing, mounting or support
136232, 428403, 374163, 374179, G01K 112, H01L 3502
Patent
active
047215348
ABSTRACT:
A protective sheath for a temperature sensing device for use in determining the temperature of molten metals. The temperature sensing device, such as a thermocouple, is encased in a molybdenum tube which is coated with successive porous layers of molybdenum, a plurality of layers of Al.sub.2 O.sub.3 --Cr.sub.2 O.sub.3 --Mo in a decreasing concentration of Mo in proceeding from the inner to the outer layers, and a layer of substantially pure Al.sub.2 O.sub.3 --Cr.sub.2 O.sub.3. The Al.sub.2 O.sub.3 --Cr.sub.2 O.sub.3 layer may be covered with an outer coating of a material, such as boron nitride, to protect the Al.sub.2 O.sub.3 --Cr.sub.2 O.sub.3 layer from attack by slag. Alternating layers of Al.sub.2 O.sub.3 --Cr.sub.2 O.sub.3 and boron nitride may be applied as outermost sacrificial layers.
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Bush James R.
Drzewiecki Tadeusz M.
Ellis Richard T.
Greenspan David C.
Negas Taki
System Planning Corporation
Yasich Daniel M.
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