Dielectric material and functional element

Patent metadata

Field	Value
Publication number	US-2025069773-A1
Application number	US-202418947897-A
Country	US
Kind code	A1
Filing date	Nov 14, 2024
Priority date	May 17, 2022
Publication date	Feb 27, 2025
Grant date	—

Abstract

A dielectric material 1 a includes a metal oxide including: Zn; a rare-earth element; and Mn.

First claim

What is claimed is:

1 . A dielectric material comprising a metal oxide including: Zn; a rare-earth element; and Mn.

2 . The dielectric material according to claim 1 , wherein the metal oxide is ferroelectric.

3 . The dielectric material according to claim 1 , wherein the rare-earth element is at least one selected from the group consisting of Nd and Y.

4 . The dielectric material according to claim 1 , wherein the rare-earth element is Nd.

5 . The dielectric material according to claim 1 , wherein
the metal oxide has a composition represented by Zn 1-x-y A x Mn y O z , in the composition, A is the rare-earth element, in the composition, z is for electroneutrality of the metal oxide, and the composition satisfies requirements 0.025≤x≤0.05 and 0.7≤y/x≤1.5.

6 . The dielectric material according to claim 1 , wherein the metal oxide has a wurtzite structure.

7 . The dielectric material according to claim 1 , comprising:
a plurality of crystal grains including the metal oxide; and a filler including an inorganic oxide different from the metal oxide, the filler filling a space between the crystal grains.

8 . A functional device comprising:
a dielectric including the dielectric material according to claim 1 ; and a pair of electrodes.

9 . The functional device according to claim 8 , being at least one selected from the group consisting of a capacitor, an electro-optic device, a memory device, a transistor, a ferroelectric data storage, a piezoelectric device, and a pyroelectric device.

10 . The functional device according to claim 8 , being configured to be mounted in at least one selected from the group consisting of an actuator, an inkjet head, a gyroscope sensor, a vibration energy harvester, a surface acoustic wave resonator, a film bulk acoustic resonator, a piezoelectric mirror, and a piezoelectric sensor.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Takeuchi Hiroki
• Morimoto Kota
• Kikuchi Ryosuke
• Adachi Hideaki

Classifications

• H01B3/10 Primary

  metallic oxides (ceramics H01B3/12) · CPC title

• H01B3/12

  ceramics · CPC title

• H10N30/30

  with mechanical input and electrical output, e.g. functioning as generators or sensors · CPC title

• H10N30/853

  Ceramic compositions · CPC title

• H10N30/20

  with electrical input and mechanical output, e.g. functioning as actuators or vibrators · CPC title