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Piezoelectric composition and piezoelectric element
US11005028B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11005028-B2 |
| Application number | US-201916357864-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 19, 2019 |
| Priority date | Mar 19, 2018 |
| Publication date | May 11, 2021 |
| Grant date | May 11, 2021 |
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Abstract
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A piezoelectric composition including copper, germanium and a complex oxide represented by a compositional formula K m NbO 3 and having a perovskite structure, in which m in the compositional formula satisfies 0.970≤m≤0.999, and with respect to 1 mol of the complex oxide, x mol % of copper in terms of a copper element and y mol % of germanium in terms of a germanium element are contained, wherein x satisfies 0.100≤x≤1.000 and y satisfies 0.000<y≤1.500.
First claim
Opening claim text (preview).
What is claimed is: 1. A piezoelectric composition comprising copper, germanium and a complex oxide represented by a compositional formula K m NbO 3 and having a perovskite structure, in which m in the compositional formula satisfies 0.970≤m≤0.999, and with respect to 1 mol of the complex oxide, x mol % of copper in terms of a copper element and y mol % of germanium in terms of a germanium element are contained, wherein x satisfies 0.100≤x≤1.000 and y satisfies 0.000<y≤1.500. 2. The piezoelectric composition according to claim 1 , wherein m satisfies 0.991≤m≤0.999. 3. The piezoelectric composition according to claim 1 , wherein x is 0.200≤x≤1.000. 4. The piezoelectric composition according to claim 1 , wherein x is 0.600≤x≤1.000. 5. The piezoelectric composition according to claim 1 , wherein y is 0.100<y≤1.500. 6. The piezoelectric composition according to claim 1 , wherein y is 1.000<y≤1.500. 7. A piezoelectric composition comprising copper, germanium and a complex oxide represented by a compositional formula K m NbO 3 and having a perovskite structure, in which m in the compositional formula satisfies 0.970≤m≤0.999, the piezoelectric composition comprises crystal grains having a perovskite structure and a grain boundary, and germanium is distributed at the grain boundary. 8. The piezoelectric composition according to claim 7 , wherein the grain boundary distributes one or more elements selected from a group consisting of potassium, niobium and copper. 9. A piezoelectric element including the piezoelectric composition according to claim 1 . 10. A piezoelectric element including the piezoelectric composition according to claim 7 .
Assignees
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Classifications
Copper · CPC title
Polyvinylalcohols [PVA]; Polyvinylacetates · CPC title
Treatment time · CPC title
Metals · CPC title
Copper oxides, cuprates or oxide-forming salts thereof, e.g. CuO or Cu2O · CPC title
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- What does patent US11005028B2 cover?
- A piezoelectric composition including copper, germanium and a complex oxide represented by a compositional formula K m NbO 3 and having a perovskite structure, in which m in the compositional formula satisfies 0.970≤m≤0.999, and with respect to 1 mol of the complex oxide, x mol % of copper in terms of a copper element and y mol % of germanium in terms of a germanium element are contained, wher…
- Who is the assignee on this patent?
- Tdk Corp
- What technology area does this patent fall under?
- Primary CPC classification C04B35/495. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue May 11 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). 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).