Conductive sintered oxide, thermistor element including the same, and temperature sensor including the same
US8771559B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2011 |
| Grant date | Jul 8, 2014 |
| Priority date | — |
| Expiry date | Apr 16, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/80
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A conductive sintered oxide which includes: a conductive crystal phase having a perovskite structure represented by (RE1-cSrc)MdO3, in which RE is a group of elements consisting of Yb and/or Lu and at least one element selected from Group IIIA elements excluding Yb, Lu and La, and M is a group of elements consisting of Al and at least one element selected from Groups IVA, VA, VIA, VIIA and VIII, a first insulating crystal phase represented by RE2O3, and a second insulating crystal phase represented by SrAl2O4. The conductive crystal phase has a coefficient c satisfying 0.18<c<0.50 and has a coefficient d satisfying 0.67≦d≦0.93. A content of a third insulating crystal phase represented by RE4Al2O9, the content of which may be zero, is smaller than the content of each of the first and second insulating crystal phases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.