Ceramic composition for thermistor and thermistor element

Electrical resistors – Resistance value responsive to a condition – Current and/or voltage

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

338 22R, H01C 710

Patent

active

055681166

ABSTRACT:
A ceramic composition for a thermistor of the formula (M.sup.1.sub.1-x.N.sup.1.sub.x)(P.sup.2.sub.1-y-z.N.sup.2.sub.y.Al.sub.z)O .sub.3 where M.sup.1 is one or more elements selected from the group 3A elements of the Periodic Table excluding La, N.sup.1 is one or more selected from the group 2A elements of the Periodic Table, P.sup.2 is one or more selected from the elements of the groups 4A, 5A, 6A, 7A and 8 of the Periodic Table whose oxides exhibit p-type characteristics, and N.sup.2 is one or more selected from the elements of the groups 4A, 5A, 6A, 7A and 8 whose oxides exhibit n-type characteristics,
wherein x, y and z are larger than 0 and smaller than 1 and 0.001.ltoreq.x/(1-y-z)<0.20, 0.05.ltoreq.y/(1-y-z).ltoreq.0.80 and 0<z/(1-y-z).ltoreq.0.90. Thermistor elements are usable within a broad temperature range of 300.degree.-1100.degree. C., have a stable resistance in oxidizing and reducing atmospheres, can prevent deterioration of lead wires, and have superior stability at high temperatures.

REFERENCES:
patent: 2981699 (1961-04-01), Ichikawa
patent: 3975307 (1974-10-01), Matsuo et al.
patent: 4156661 (1979-05-01), Brodmann et al.
patent: 4229322 (1980-10-01), Marchant et al.
patent: 4743881 (1988-05-01), Howng
patent: 4840925 (1989-06-01), Rousset et al.
patent: 4891158 (1990-01-01), Hata
patent: 4952902 (1990-08-01), Kawaguchi et al.
Communication from European Patent Office dated Aug. 22, 1994.
Yano, K., "Fine Ceramic Handbook" published by Asakura Shoten.
Nakahara, K., "Automobile Combustion Control Sensors", vol. 30. No. 382 (1991), pp. 95-103.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Ceramic composition for thermistor and thermistor element does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ceramic composition for thermistor and thermistor element, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ceramic composition for thermistor and thermistor element will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2361831

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.