Ceramic composition
US-9487445-B2 · Nov 8, 2016 · US
Piezoelectric composition and piezoelectric device
US9905749B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9905749-B2 |
| Application number | US-201514832309-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 21, 2015 |
| Priority date | Aug 29, 2014 |
| Publication date | Feb 27, 2018 |
| Grant date | Feb 27, 2018 |
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- Title
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Abstract
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The present invention aims to provide a piezoelectric composition which is free of lead based compounds and is represented by the following formula (1), (Bi 0.5x Na 0.5x Ba 0.7y+z Ca 0.3y ) a (Ti x+y+0.8z Hf 0.2z )O 3 (1), wherein, x, y, z and a in formula (1) meets the following conditions, 0.70 x 0.90, 0.02 y 0.28, 0.02 z 0.28, 0.90 a 1.10 and x+y+z=1. The present invention also provides a piezoelectric device having the piezoelectric composition mentioned above.
First claim
Opening claim text (preview).
What is claimed is: 1. A piezoelectric composition which is free of lead based compounds and is represented by the following formula (1), (Bi 0.5x Na 0.5x Ba 0.7y+z Ca 0.3y ) a (Ti x+y+0.8z Hf 0.2z )O 3 (1) x, y, z and a in formula (1) meeting the following conditions, 0.80 x 0.85, 0.10 y 0.13, 0.02 z 0.10, 0.90 a 1.10, x+y+z=1. 2. A piezoelectric device comprising the piezoelectric composition of claim 1 .
Assignees
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Classifications
Electricity · mapped topic
- H01L41/18Primary
Electricity · mapped topic
Electricity · mapped topic
- H10N30/8561Primary
Bismuth-based oxides · CPC title
having a stacked or multilayer structure · CPC title
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- What does patent US9905749B2 cover?
- The present invention aims to provide a piezoelectric composition which is free of lead based compounds and is represented by the following formula (1), (Bi 0.5x Na 0.5x Ba 0.7y+z Ca 0.3y ) a (Ti x+y+0.8z Hf 0.2z )O 3 (1), wherein, x, y, z and a in formula (1) meets the following conditions, 0.70 x 0.90, 0.02 y 0.28, 0.02 z 0.28, 0.90 a 1.10 and x+y+z=1. The present invention also provides a p…
- Who is the assignee on this patent?
- Tdk Corp
- What technology area does this patent fall under?
- Primary CPC classification H01L41/18. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Feb 27 2018 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).