Nitride aluminum particle

Patent metadata

Field	Value
Publication number	US-11097948-B2
Application number	US-201716073608-A
Country	US
Kind code	B2
Filing date	Jan 25, 2017
Priority date	Jan 29, 2016
Publication date	Aug 24, 2021
Grant date	Aug 24, 2021

Abstract

To provide an aluminum nitride particle having a hexagonal columnar barrel part and bowl-like projection parts at both ends of the columnar part, wherein the long diameter (D) of the barrel part is 10 to 250 μm, the ratio (L1/D) of the distance (L1) between the apexes of the two projection pars to the long diameter (D) of the barrel part is 0.7 to 1.3, and the percentage of the length or thickness (L2) of the barrel part to the distance (L1) between the apexes of the two projection parts is 10 to 60%. The aluminum nitride particle can provide high heat conductivity and excellent electric insulation to a resin when it is filled into the resin.

First claim

The invention claimed is:

1. An aluminum nitride particle comprising:
a hexagonal columnar barrel part, and
two convex projection parts,

wherein:
one of the two convex projection parts is located at one end of the columnar barrel part, and another one of the two convex projection parts is located at an opposite end of the columnar barrel part,
a long diameter (D) of the columnar barrel part is 10 to 250 μm,
a ratio (L 1 /D) of a distance (L 1 ) between apexes of the two projection parts to the long diameter (D) of the columnar barrel part is 0.7 to 1.3, and
a percentage of a length or thickness (L 2 ) of the columnar barrel part to the distance (L 1 ) between the apexes of the two projection parts is 10 to 60%.

2. The aluminum nitride particle according to claim 1 , wherein part of each of the projection parts has a flat portion at a center of a top portion of the projection part.

3. The aluminum nitride particle according to claim 2 , wherein the particle has 5 or less voids having a diameter of 2 μm or more.

4. An aluminum nitride powder containing not less than 40 vol % of the aluminum nitride particle of claim 2 .

5. A resin composition comprising the aluminum nitride particle of claim 2 and a resin, wherein the amount of the aluminum nitride particle in the resin composition is 300 to 1,000 parts by weight based on 100 parts by weight of the resin.

6. The aluminum nitride particle according to claim 1 , wherein the particle has 5 or less voids having a diameter of 2 μm or more.

7. An aluminum nitride powder containing not less than 40 vol % of the aluminum nitride particle of claim 6 .

8. A resin composition comprising the aluminum nitride particle of claim 6 and a resin, wherein the amount of the aluminum nitride particle in the resin composition is 300 to 1,000 parts by weight based on 100 parts by weight of the resin.

9. An aluminum nitride powder containing not less than 40 vol % of the aluminum nitride particle of claim 1 .

10. A resin composition comprising the aluminum nitride particle of claim 1 and a resin, wherein the amount of the aluminum nitride particle in the resin composition is 300 to 1,000 parts by weight based on 100 parts by weight of the resin.

11. The resin composition according to claim 10 , wherein the resin is a thermoplastic resin or thermosetting resin.

12. A molded body formed from the resin composition of claim 11 .

13. A molded body formed from the resin composition of claim 10 .

Assignees

• Tokuyama Corp

Inventors

• Kuramoto Akimasa
• Yamamoto Kikuo
• Ou Mou
• Fujii Saiko
• Kanechika Yukihiro
• Nawata Teruhiko

Classifications

• C01B21/072 Primary

  with aluminium · CPC title

• C09C1/40

  Compounds of aluminium {(C09C1/0009, C09C1/0015, C09C1/0078, C09C1/32 take precedence)} · CPC title

• C01P2004/30

  extending in three dimensions · CPC title

• C01P2004/61

  Micrometer sized, i.e. from 1-100 micrometer · CPC title

• C08L101/00

  Compositions of unspecified macromolecular compounds · CPC title