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Piezoelectric ceramic comprising an oxide and piezoelectric device
US9105845B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9105845-B2 |
| Application number | US-201213712426-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 12, 2012 |
| Priority date | Dec 26, 2011 |
| Publication date | Aug 11, 2015 |
| Grant date | Aug 11, 2015 |
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Abstract
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A piezoelectric ceramic with environmental friendliness including a composition as the main component composed of a composite oxide free from lead (Pb) as a constituent element, and with excellent piezoelectric characteristics such as the relative dielectric constant, the electromechanical coupling factor, and the piezoelectric constant, and a piezoelectric device using the piezoelectric ceramic, are provided. A piezoelectric ceramic including a composition represented by the following general formula as the main component: (K1-x-y-w-vNaxLiyBawSrv)m(Nb1-z-uTaz-Zru)O3 (wherein, x, y, z, w, v, u and m in the formula satisfy the following conditions respectively: 0.4<x≦0.7; 0.02≦y≦0.1; 0<z≦0.3; 0<w≦0.01; 0.04≦v≦0.07; 0.04≦u≦0.07; and 0.95≦m<1).
First claim
Opening claim text (preview).
What is claimed is: 1. A piezoelectric ceramic comprising a composition represented by the following general formula (1) as the main component, (K 1-x-y-w-v Na x Li y Ba w Sr v ) m (Nb 1-z-u Ta z -Zr u )O 3 (1) wherein, x, y, z, w, v, u and m in the formula (1) are satisfying the following conditions respectively, 0.4<x≦0.7, 0.02≦y≦0.1, 0<z≦0.3, 0<w≦0.01, 0.04≦v≦0.07, 0.04≦u≦0.07, and 0.95≦0.975. 2. A piezoelectric ceramic according to claim 1 , furth…
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Classifications
- C04B35/495Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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- What does patent US9105845B2 cover?
- A piezoelectric ceramic with environmental friendliness including a composition as the main component composed of a composite oxide free from lead (Pb) as a constituent element, and with excellent piezoelectric characteristics such as the relative dielectric constant, the electromechanical coupling factor, and the piezoelectric constant, and a piezoelectric device using the piezoelectric cerami…
- 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 Aug 11 2015 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).