Rare earth or yttrium, transition metal oxide thermistors

Measuring and testing – Gas analysis – Moisture content or vapor pressure

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G01K 718

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active

042312540

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:
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patent: 4010121 (1977-03-01), Walch
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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 Orthochromites, -Manganites and -Ferrites", Phys. Chem. Solids, vol. 32, pp. 345-358, 1971.
Ganguly et al., "Electron Transport and 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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