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Sintered electrically conductive oxide for oxygen sensor electrode, and oxygen sensor using the same
US2016334361A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016334361-A1 |
| Application number | US-201615152888-A |
| Country | US |
| Kind code | A1 |
| Filing date | May 12, 2016 |
| Priority date | May 13, 2015 |
| Publication date | Nov 17, 2016 |
| Grant date | — |
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Abstract
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A sintered electrically conductive oxide for an oxygen sensor electrode includes a crystal phase formed of a perovskite-type electrically conductive oxide containing at least La, Fe and Ni. The oxide has an absolute value of thermoelectromotive force at 770° C. of 21.0 μV/K or less.
First claim
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What is claimed is: 1 . A sintered electrically conductive oxide for an oxygen sensor electrode including a crystal phase formed of a perovskite-type electrically conductive oxide containing at least La, Fe and Ni, having an absolute value of thermoelectromotive force at 770 ° C. of 21.0 μV/K or less. 2 . The sintered electrically conductive oxide for an oxygen sensor electrode as claimed in claim 1 , wherein the crystal phase has a perovskite-type oxide crystal structure expressed by the compositional formula: La a Co b Fe c Ni d O x (where a +b +c +d =1, 1.25 ≦x ≦1.75), and a, b, c and d satisfy 0. 474 ≦a ≦0.512, 0 ≦b ≦0.225, 0 ≦c ≦0.300 and 0.200 ≦d ≦0.350. 3 . The sintered electrically conductive oxide for an oxygen sensor electrode as claimed in claim 2 , wherein a and b satisfy 0. 474 ≦a <0.512 and 0 ≦b <0.100. 4 . The sintered electrically conductive oxide for an oxygen sensor electrode as claimed in claim 1 , containing substantially no alkaline earth metal elements. 5 . A sintered electrically conductive oxide for an oxygen sensor electrode including a crystal phase having a perovskite-type oxide crystal structure expressed by the compositional formula: La a Co b Fe c Ni d O x (where a +b +c +d =1, 1.25 ≦x ≦1.75), and a, b, c and d satisfy 0. 474 ≦a ≦0.512, 0≦b≦0.225, 0 ≦c ≦0.300 and 0.200 ≦d ≦0.350. 6 . An oxygen sensor comprising an electrode formed of a sintered electrically conductive oxide for an oxygen sensor electrode as claimed in claim 1 . 7 . The oxygen sensor as claimed in claim 6 , wherein the electrode is a reference electrode. 8 . An oxygen sensor comprising an electrode formed of a sintered electrically conductive oxide for an oxygen sensor electrode as claimed in claim 5 . 9 . The oxygen sensor as claimed in claim 8 , wherein the electrode is a reference electrode.
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Classifications
Granulation or pelletising (devices for shaping artificial aggregates from ceramic mixtures B28B1/004) · CPC title
- C30B29/22Primary
Complex oxides · CPC title
Non-stoichiometric products, e.g. perovskites (ABO3) with an A/B-ratio other than 1 · CPC title
Cobalt oxides, cobaltates or cobaltites or oxide forming salts thereof, e.g. bismuth cobaltate, zinc cobaltite · CPC title
Nickel oxides, nickalates, or oxide-forming salts thereof · CPC title
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- What does patent US2016334361A1 cover?
- A sintered electrically conductive oxide for an oxygen sensor electrode includes a crystal phase formed of a perovskite-type electrically conductive oxide containing at least La, Fe and Ni. The oxide has an absolute value of thermoelectromotive force at 770° C. of 21.0 μV/K or less.
- Who is the assignee on this patent?
- Ngk Spark Plug Co
- What technology area does this patent fall under?
- Primary CPC classification C30B29/22. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Nov 17 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).