Ceramic composition for thermistor, thermistor element, and proc

Details Ceramic composition for thermistor, thermistor element, and proc Ceramic composition for thermistor, thermistor element, and proc

1995-12-18

1997-06-10

Bonner, Melissa

Compositions: ceramic

Ceramic compositions

Yttrium, lanthanide, actinide, or transactinide containing

501127, 501153, 501134, 252521, 252518, 252 623T, 338 22R, C04B 3512

Patent

active

056375433

ABSTRACT:
A ceramic composition for thermistor exhibiting stable resistance values over a wide temperature range and capable of being used for a prolonged time. The composition is represented by (M.sup.1 M.sup.2 O.sub.3).sub.1-x .multidot.(M.sup.1 AlO.sub.3).sub.x, wherein M.sup.1 is an element selected from the elements of the group 3A excluding La and M.sup.2 is an element of the groups 4A, 5A, 6A, 7A and 8, and wherein the mixing ratio between an electrically conductive substance stable at elevated temperatures and an insulating substance stable at elevated temperatures, may be adjusted. A thermistor formed of the composition is superior in high-temperature stability and can be used over a broad temperature range because its resistance value can be selected to an optimum value.

REFERENCES:
patent: 4156661 (1979-05-01), Brodmann et al.
patent: 4229322 (1980-10-01), Marchant et al.
patent: 5476822 (1995-12-01), Iwaya et al.

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