Wide-range type thermistor element and method of producing the same
US6261480A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Aug 25, 1999 |
| Grant date | Jul 17, 2001 |
| Priority date | — |
| Expiry date | Aug 25, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31522
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The thermistor element of the present invention is composed of a mixed sintered body aM.sup.1 M.sup.2 O.sub.3.bY.sub.2 O.sub.3 of a composition M.sup.1 M.sup.2 O.sub.3 (wherein M.sup.1 is Y, and M.sup.2 is at least one element selected from the elements such as Cr, Mn, Ti, etc.) as a perovskite compound and Y.sub.2 O.sub.3, wherein molar fractions a and b satisfy the relations 0.05.ltoreq.a<1.0, 0<b.ltoreq.0.95 and a+b=1. Another wide-range type thermistor element of the present invention is composed of a perovskite compound M.sup.1 (M.sup.2 M.sup.3)O.sub.3, wherein M.sup.1 is at least one element selected from the elements of the groups II and IIIA excluding La in the Periodic Table, and each of M.sup.2 and M.sup.3 is at least one element selected from the elements of the groups IIB, IIIB, IVA, VA, VIA, VIIA and VIII. a and b satisfy the relations a+b=1 and 0<b<0.1, where a is a molar fraction of M.sup.2 and b is a molar fraction of M.sup.3 in M.sup.1 (M.sup.2 M.sup.3)O.sub.3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.