Rare earth or yttrium, transition metal oxide thermistors

Details Rare earth or yttrium, transition metal oxide thermistors Rare earth or yttrium, transition metal oxide thermistors

1977-12-05

1979-07-31

Gorenstein, Charles

Measuring and testing

Gas analysis

Moisture content or vapor pressure

252521, 338 22R, G01K 718, H01B 106

Patent

active

041626311

ABSTRACT:
Thermistors comprising transition metal such as iron, rare earth of the lanthanide series or yttrium, and oxygen exhibit sufficient independence to variation in oxygen partial pressure over a range of exhaust gas conditions of internal combustion engines as to make them particularly suitable for temperature compensation of oxygen sensors such as those derived from titania as well as temperature sensing in other oxygen varying environments.

REFERENCES:
patent: 3681734 (1972-08-01), Brown
patent: 3950273 (1976-04-01), Jones
patent: 4010118 (1977-03-01), Walch
patent: 4010119 (1977-03-01), Walch
patent: 4010120 (1977-03-01), Walch
patent: 4010121 (1977-03-01), Walch
patent: 4010122 (1977-03-01), Walch
patent: 4013592 (1977-03-01), Matsuoka et al.
patent: 4014822 (1977-03-01), Fujikawa
patent: 4033906 (1977-07-01), Nagasawa et al.
patent: 4038217 (1977-07-01), Nambu et al.
Rao et al., "Electrical Transport in Rare Earth Ortho-Chromites, -Manganites and -Ferrites", Phys. Chem. Solids, vol. 32, pp. 345-358, 1971.
Ganguly et al., "Electron Transport & Magnetic Properties of Rare Earth Ortho-Titanites and -Vanadites, LnTiO.sub.3 and LnVO.sub.3 ", Indian Inst. of Tech., 1976.

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