Magnetodielectric y-phase strontium hexagonal ferrite materials formed by sodium substitution
US-2019019605-A1 · Jan 17, 2019 · US
Piezoelectric composition and piezoelectric device
US2018261758A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018261758-A1 |
| Application number | US-201815914093-A |
| Country | US |
| Kind code | A1 |
| Filing date | Mar 7, 2018 |
| Priority date | Mar 9, 2017 |
| Publication date | Sep 13, 2018 |
| Grant date | — |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A piezoelectric composition comprises a plurality of crystal particles, wherein the piezoelectric composition includes bismuth, iron, barium, titanium, and oxygen; the crystal particles include a core and a shell covering the core; the average value of the contents of bismuth in the cores is expressed as CCORE % by mass, the average value of the contents of bismuth in the shells is expressed as CSHELL % by mass, and the CCORE is lower than the CSHELL; and the number of all the particles comprised in the piezoelectric composition is expressed as N, the number of the crystal particles including the core and the shell is expressed as n, and n/N is 0.10 to 1.00.
First claim
Opening claim text (preview).
What is claimed is: 1 . A piezoelectric composition comprising a plurality of crystal particles, wherein the piezoelectric composition includes bismuth, iron, barium, titanium, and oxygen; the crystal particle includes a core and a shell covering the core; an average value of contents of bismuth in the cores is expressed as C CORE % by mass, an average value of contents of bismuth in the shells is expressed as C SHELL % by mass, and the C CORE is lower than the C SHELL ; and a number of all particles comprised in the piezoelectric composition is expressed as N, a number of the crystal particles including the core and the shell is expressed as n, and n/N is 0.10 to 1.00. 2 . The piezoelectric composition according to claim 1 wherein the C CORE /C SHELL is 0.10 to 0.95. 3 . The piezoelectric composition according to claim 1 , wherein the piezoelectric composition is a sintered body. 4 . A piezoelectric device comprising the piezoelectric composition according to claim 1 . 5 . The piezoelectric device according to claim 4 , wherein a piezoelectric constant d 33 of the piezoelectric composition to which an electric field of 0.1 to 2.0 kV/mm is applied is 200 pC/N or more.
Assignees
Inventors
Classifications
Drying, e.g. freeze-drying, spray-drying, microwave or supercritical drying · CPC title
Treating the starting powders individually or as mixtures · CPC title
Bismuth oxides, bismuthates or oxide forming salts thereof, e.g. zinc bismuthate · CPC title
submicron sized, i.e. from 0,1 to 1 micron · CPC title
of calcined, sintered clinker or ceramics · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US2018261758A1 cover?
- A piezoelectric composition comprises a plurality of crystal particles, wherein the piezoelectric composition includes bismuth, iron, barium, titanium, and oxygen; the crystal particles include a core and a shell covering the core; the average value of the contents of bismuth in the cores is expressed as CCORE % by mass, the average value of the contents of bismuth in the shells is expressed as…
- Who is the assignee on this patent?
- Tdk Corp
- What technology area does this patent fall under?
- Primary CPC classification C04B35/2683. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Sep 13 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).