Electrocaloric effect element

Patent metadata

Field	Value
Publication number	US-12467664-B2
Application number	US-202217831471-A
Country	US
Kind code	B2
Filing date	Jun 3, 2022
Priority date	Dec 23, 2019
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

An electrocaloric effect element includes a laminate including an electrode layer mainly including Pt and a ceramic layer that are stacked, in which the ceramic layer has a perovskite structure and mainly includes a ceramic including Pb, Sc, and Ta, where a content ratio of Sc is y, a content ratio of Ta is 1−y, and a range of the y is about 0.450≤y≤about 0.495.

First claim

What is claimed is:

1 . An electrocaloric effect element comprising:
a laminate including an electrode layer mainly including Pt and a ceramic layer that are stacked; wherein the electrode layer mainly includes Pt such that Pt has a largest % by mass in the electrode layer; the ceramic layer has a perovskite structure and mainly includes a ceramic including Pb, Sc, and Ta, a content ratio of Sc is y, a content ratio of Ta is 1-y, and a range of the y is about 0.450≤y≤about 0.495; and the ceramic layer mainly includes the ceramic such that the ceramic has a largest % by mass in the ceramic layer.

2 . The electrocaloric effect element according to claim 1 , wherein the ceramic layer in the laminate has a thickness of about 50 μm or less.

3 . An electronic component comprising the electrocaloric effect element according to claim 1 .

4 . The electronic component according to claim 3 , wherein the ceramic layer in the laminate has a thickness of about 50 μm or less.

5 . The electrocaloric effect element according to claim 1 , further comprising at least one external electrode connected to the electrode layer.

6 . The electrocaloric effect element according to claim 1 , wherein the electrode layer is an internal electrode layer provided in the laminate.

7 . The electrocaloric effect element according to claim 1 , wherein the Pt included in the electrode layer includes about 80% by mass or more of Pt.

8 . The electrocaloric effect element according to claim 1 , wherein the Pt included in the electrode layer includes about 95% by mass or more of Pt.

9 . The electrocaloric effect element according to claim 1 , wherein the Pt included in the electrode layer includes about 98% by mass or more of Pt.

10 . An electrocaloric effect element comprising:
a laminate including an electrode layer mainly including Pt and a ceramic layer that are stacked; wherein the electrode layer mainly includes Pt such that Pt has a largest % by mass in the electrode layer; the ceramic layer has a perovskite structure and mainly includes a ceramic represented by a formula Pb x Sc y Ta 1-y O 3-σ , where x satisfies about 0.97≤x≤about 1.03, y satisfies about 0.450≤y≤about 0.495, and σsatisfies −0.1≤σ≤0.1; and the ceramic layer mainly includes the ceramic such that the ceramic has a largest % by mass in the ceramic layer.

11 . The electrocaloric effect element according to claim 10 , wherein x satisfies 0.985≤x≤1.015.

12 . The electrocaloric effect element according to claim 10 , wherein the ceramic layer in the laminate has a thickness of about 50 μm or less.

13 . An electronic component comprising the electrocaloric effect element according to claim 10 .

14 . The electronic component according to claim 13 , wherein x satisfies 0.985≤x≤1.015.

15 . The electronic component according to claim 13 , wherein the ceramic layer in the laminate has a thickness of about 50 μm or less.

16 . The electrocaloric effect element according to claim 10 , further comprising at least one external electrode connected to the electrode layer.

17 . The electrocaloric effect element according to claim 10 , wherein the electrode layer is an internal electrode layer provided in the laminate.

18 . The electrocaloric effect element according to claim 10 , wherein the Pt included in the electrode layer includes about 80% by mass or more of Pt.

19 . The electrocaloric effect element according to claim 10 , wherein the Pt included in the electrode layer includes about 95% by mass or more of Pt.

20 . The electrocaloric effect element according to claim 10 , wherein the Pt included in the electrode layer includes about 98% by mass or more of Pt.

Assignees

• Murata Manufacturing Co

Inventors

• Hirose Sakyo

Classifications

• F25B2321/001

  by using electro-caloric effects · CPC title

• H10N15/15

  Thermoelectric active materials · CPC title

• C04B2235/81

  Materials characterised by the absence of phases other than the main phase, i.e. single phase materials · CPC title

• C04B2235/80

  Phases present in the sintered or melt-cast ceramic products other than the main phase · CPC title

• C04B2235/95

  Products characterised by their size, e.g. microceramics · CPC title