Dielectric material

Patent metadata

Field	Value
Publication number	US-10529471-B2
Application number	US-201716334140-A
Country	US
Kind code	B2
Filing date	Sep 19, 2017
Priority date	Sep 20, 2016
Publication date	Jan 7, 2020
Grant date	Jan 7, 2020

Abstract

Provided are a novel dielectric material and a novel electrostrictive material. The dielectric material or electrostrictive material comprises a charge-separation type non-coulombic ionic solid in which complex cations each composed of a metal element and a ligand are aggregated to form cation clusters, the cation clusters are arranged in a closest packed structure, and anions are aggregated to form anion clusters in interstices of the closest packed structure.

First claim

The invention claimed is:

1. A dielectric material, comprising:
a charge-separation type non-coulombic ionic solid in which complex cations each composed of a metal element and a ligand are aggregated to form cation clusters, the cation clusters are arranged in a closest packed structure, and anions are aggregated to form anion clusters in interstices of the closet packed structure.

2. The dielectric material according to claim 1 , wherein the charge-separation type non-coulombic ionic solid is a charge-separation type non-coulombic ionic solid in which multinuclear complex cations each composed of two metal elements and two ligands are aggregated to form cation clusters, the cation clusters are arranged in a face-centered cube, and inorganic anions serving as counter anions are aggregated to form anion clusters in tetrahedral interstices of the face-centered cube.

3. The dielectric material according to claim 1 , wherein the cation cluster is an M 1 M 2 hexa- to deca-nuclear complex cation cluster in which an element (M 1 ) selected from the group consisting of elements of Group 10 and Group 11 and an element (M 2 ) selected from the group consisting of elements of Group 6, Group 9, and Group 13 are linked via two ligands (X 1 and X 2 ).

4. The dielectric material according to claim 1 , wherein the charge-separation type non-coulombic ionic solid is a charge-separation type non-coulombic ionic solid of formula (1):
(M 1 ) l (M 2 ) m (X 1 ) n (X 2 ) o (X 3 ) p .q H 2 O  (1), wherein:

M 1 represents an element selected from the group consisting of elements of Group 10 and Group 11;
M 2 represents an element selected from the group consisting of elements of Group 6, Group 9, and Group 13;
X 1 represents a ligand having at least two phosphino groups;
X 2 represents a ligand having at least one thiol group and at least one carboxyl group;
X 1 represents an anion;
l and m each represent a number from 2 to 6, wherein a sum of l and m is 6 to 10; and
n represents a number from 1 to 2, o represents a number from 2 to 6, and p and q each represent a number from 1 to 16.

5. The dielectric material according to claim 3 , wherein X 1 is a ligand having at least two diarylphosphino groups.

6. The dielectric material according to claim 3 , wherein X 2 is a ligand having a hydrogen-bonding functional group in addition to the at least one thiol group and the at least one carboxyl group.

7. The dielectric material according to claim 1 , wherein the charge-separation type non-coulombic ionic solid undergoes a decrease in electrical resistance value to 1/100,000 or less with a temperature change from 100 K to 450 K.

8. A thermometer, comprising:
the dielectric material according to claim 1 .

9. A thermistor, comprising:
the dielectric material according to claim 1 .

10. A device protection circuit configured to operate in response to temperature increase, the device protection circuit comprising a thermostat using the dielectric material according to claim 1 .

11. An electrostrictive material comprising a charge-separation type non-coulombic ionic solid in which complex cations each composed of a metal element and a ligand are aggregated to form cation clusters, the cation clusters are arranged in a closest packed structure, and anions are aggregated to form anion clusters in interstices of the closest packed structure.

12. The electrostrictive material according to claim 11 , wherein the charge-separation type non-coulombic ionic solid is a charge-separation type non-coulombic ionic solid in which multinuclear complex cations each composed of two metal elements and two ligands are aggregated to form cation clusters, the cation clusters are arranged in a face-centered cube, and inorganic anions serving as counter anions are aggregated to form anion clusters in tetrahedral interstices of the face-centered cube.

13. The electrostrictive material according to claim 11 , wherein the cation cluster is an M 1 M 2 hexa- to deca-nuclear complex cation cluster in which an element (M 1 ) selected from the group consisting of elements of Group 10 and Group 11 and an element (M 2 ) selected from the group consisting of elements of Group 6, Group 9, and Group 13 are linked via two ligands (X 1 and X 2 ).

14. The electrostrictive material according to claim 11 , wherein the charge-separation type non-coulombic ionic solid is a charge-separation type non-coulombic ionic solid of formula (1):
(M 1 ) l (M 2 ) m (X 1 ) n (X 2 ) o (X 3 ) p .q H 2 O  (1), wherein:

M 1 represents an element selected from the group consisting of elements of Group 10 and Group 11;
M 2 represents an element selected from the group consisting of elements of Group 6, Group 9, and Group 13;
X 1 represents a ligand having at least two phosphino groups;
X 2 represents a ligand having at least one thiol group and at least one carboxyl group;
X 3 represents an anion;
l and m each represent a number from 2 to 6, wherein a sum of l and m is 6 to 10; and
n represents a number from 1 to 2, o represents a number from 2 to 6, and p and q each represent a number from 1 to 16.

15. The electrostrictive material according to claim 11 , wherein X 1 is a ligand having at least two diarylphosphino groups.

16. The electrostrictive material according to claim 11 , wherein X 2 is a ligand having a hydrogen-bonding functional group in addition to the at least one thiol group and the at least one carboxyl group.

17. The electrostrictive material according to claim 11 , wherein the charge-separation type non-coulombic ionic solid isotropically shrinks upon voltage application.

18. An actuator comprising the electrostrictive material according to claim 11 .

19. A multinuclear metal complex of formula (1a):
(M 1 ) l (M 2 ) m (X 1 ) n (X 2a ) o .(X 3 ) p .q H 2 O  (1a), wherein:

M 1 represents an element selected from the group consisting of elements of Group 10 and Group 11;
M 2 represents an element selected from the group consisting of elements of Group 6, Group 9, and Group 13;
X 1 represents a ligand having at least two phosphino groups;
X 2a represents a ligand having at least one thiol group and at least one carboxyl group, wherein the ligand is other than penicillamine;
X 3 represents an anion;
l and m each represent a number from 2 to 6, wherein a sum of l and m is 6 to 10; and
n represents a number from 1 to 2, o represents a number from 3 to 6, and p and q each represent a number from 1 to 16.

20. The multinuclear metal complex according to claim 19 , wherein X 1 is a ligand having at least two diarylphosphino groups.

21. The multinuclear metal complex according to claim 19 , wherein X 2a is a ligand having a hydrogen-bonding functional group in addition to the at least one thiol group and the at least one carboxyl group.

Assignees

• Japan Science & Tech Agency

Inventors

• Konno Takumi
• Yamashita Satoshi

Classifications

• H01G4/18

  of synthetic material, e.g. derivatives of cellulose (H01G4/16 takes precedence) · CPC title

• H01C7/049 Primary

  mainly consisting of organic or organo-metal substances · CPC title

• H01C7/028

  consisting of organic substances · CPC title

• H01G4/33

  Thin- or thick-film capacitors {(thin- or thick-film circuits; capacitors without a potential-jump or surface barrier specially adapted for integrated circuits, details thereof, multistep manufacturing processes therefor)} · CPC title

• H01C17/0658

  composed of inorganic material · CPC title