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Piezoelectric composition and piezoelectric element
US11659769B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11659769-B2 |
| Application number | US-201816497052-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 20, 2018 |
| Priority date | Mar 28, 2017 |
| Publication date | May 23, 2023 |
| Grant date | May 23, 2023 |
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Abstract
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A piezoelectric composition including manganese and a complex oxide having a perovskite structure represented by a general formula ABO 3 , wherein an A site element in the ABO 3 is potassium or potassium and sodium, a B site element in the ABO 3 is niobium, a concentration distribution of the manganese has a variation, and the variation shows a CV value of 35% or more and 440% or less.
First claim
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What is claimed is: 1. A piezoelectric composition comprising manganese and a complex oxide having a perovskite structure represented by compositional formula (K x , Na y )NbO 3 ,wherein x and y in the compositional formula satisfy 0.800≤x≤1.005, y≤0.190, and 0.980≤x+y≤1.005, a concentration distribution of the manganese has a variation, and the variation shows a CV value of 35% or more and 440% or less. 2. The piezoelectric composition according to claim 1 , wherein the manganese is included in z mol % in terms of MnO 2 with respect to 1 mol of the complex oxide, and z satisfies 0.50≤z≤2.50. 3. The piezoelectric composition according to claim 1 comprising copper, wherein the copper is included in n mol % in terms of CuO with respect to 1 mol of the complex oxide, and n satisfies 0.20≤n≤0.80. 4. A piezoelectric element including the piezoelectric composition according to claim 1 . 5. The piezoelectric composition according to claim 2 comprising copper, wherein the copper is included in n mol % in terms of CuO with respect to 1 mol of the complex oxide, and n satisfies 0.20≤n≤0.80. 6. A piezoelectric element including the piezoelectric composition according to claim 2 . 7. A piezoelectric element including the piezoelectric composition according to claim 3 . 8. A piezoelectric element including the piezoelectric composition according to claim 5 .
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Classifications
Carbonates · CPC title
Removal thereof · CPC title
by sintering · CPC title
Niobium oxides, niobates, tantalum oxides, tantalates, or oxide-forming salts thereof · CPC title
Alkali metal oxides or oxide-forming salts thereof · CPC title
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- What does patent US11659769B2 cover?
- A piezoelectric composition including manganese and a complex oxide having a perovskite structure represented by a general formula ABO 3 , wherein an A site element in the ABO 3 is potassium or potassium and sodium, a B site element in the ABO 3 is niobium, a concentration distribution of the manganese has a variation, and the variation shows a CV value of 35% or more and 440% or less.
- Who is the assignee on this patent?
- Tdk Corp
- What technology area does this patent fall under?
- Primary CPC classification H10N30/8542. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue May 23 2023 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).