Piezoelectric device with piezoelectric ceramic layer having AG segregated in voids in sintered body of perovskite composition
US-9406866-B2 · Aug 2, 2016 · US
Piezoelectric ceramic composition constituted by Ag-segregated sintered body of zirconate-titanate type perovskite composition
US9614142B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9614142-B2 |
| Application number | US-201514973671-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 17, 2015 |
| Priority date | Dec 20, 2011 |
| Publication date | Apr 4, 2017 |
| Grant date | Apr 4, 2017 |
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Abstract
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A piezoelectric ceramic composition contains a perovskite composition which is represented by (Pba·Rex){Zr b ·Ti c , ·(Ni 1/3 Nb 2/3 ) d ·(Zn 1/3 Nb 2/3 ) e }O 3 (wherein Re represents La and/or Nd, and a-e and x satisfy the following conditions 0.95≦a≦1.05, 0≦x≦0.05, 0.35≦b≦0.45, 0.35≦c≦0.45, 0<d≦0.10, 0.07≦e≦0.20 and b+c+d+e=1) and 0.05-0.3% by mass of an Ag component in terms of oxides relative to the perovskite composition.
First claim
Opening claim text (preview).
What is claimed is: 1. A piezoelectric ceramic composition obtained by sintering a zirconate-titanate type perovskite composition expressed by Formula (1) below, as well as an Ag component, wherein the Ag component is contained by 0.05 to 0.3 parts by mass per 100 parts by mass of the zirconate-titanate type perovskite composition in terms of oxides: (Pb a ·Re x )(Zr b ·Ti c ·(Ni 1/3 Nb 2/3 ) d ·(Zn 1/3 Nb 2/3 ) e )O 3 (1) wherein Re represents at least one of La and Nd, and a to e and x meet the respective requirements below: 0.95≦a≦1.05 0≦x≦0.05 0.35≦b≦0.45 0.3≦c≦0.45 0<d≦0.10 0.07≦e≦0.20 b+c+d+= 1, wherein metal Ag is segregated in voids present in the sintered body of the perovskite composition. 2. A piezoelectric ceramic composition according to claim 1 , wherein a maximum grain size of the Ag component is 3 μm or less. 3. A piezoelectric ceramic composition according to claim 1 , wherein a grain size of metal Ag segregated in the voids present in the sintered body of the perovskite composition is 0.1 to 3 μm in d80 diameter.
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Micrometer sized grains, i.e. from 1 to 100 micron · CPC title
Lanthanum oxide or oxide-forming salts thereof · CPC title
Niobium oxides, niobates, tantalum oxides, tantalates, or oxide-forming salts thereof · CPC title
Lithium oxide or oxide-forming salts thereof · CPC title
Electricity · mapped topic
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- What does patent US9614142B2 cover?
- A piezoelectric ceramic composition contains a perovskite composition which is represented by (Pba·Rex){Zr b ·Ti c , ·(Ni 1/3 Nb 2/3 ) d ·(Zn 1/3 Nb 2/3 ) e }O 3 (wherein Re represents La and/or Nd, and a-e and x satisfy the following conditions 0.95≦a≦1.05, 0≦x≦0.05, 0.35≦b≦0.45, 0.35≦c≦0.45, 0<d≦0.10, 0.07≦e≦0.20 and b+c+d+e=1) and 0.05-0.3% by mass of an Ag component in terms of oxides rela…
- Who is the assignee on this patent?
- Taiyo Yuden Kk
- What technology area does this patent fall under?
- Primary CPC classification H01L41/1873. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Apr 04 2017 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).