Method and apparatus for producing AlN whiskers, AlN whisker bodies, AlN whiskers, resin molded body, and method for producing resin molded body

Patent metadata

Field	Value
Publication number	US-11939267-B2
Application number	US-202217734416-A
Country	US
Kind code	B2
Filing date	May 2, 2022
Priority date	Mar 17, 2017
Publication date	Mar 26, 2024
Grant date	Mar 26, 2024

Abstract

A method and apparatus for producing AlN whiskers includes reduced incorporation of metal particles, an AlN whisker body, AlN whiskers, a resin molded body, and a method for producing the resin molded body. The method for producing AlN whiskers includes heating an Al-containing material in a material accommodation unit to thereby generate Al gas; and introducing the Al gas into a reaction chamber through a communication portion while introducing nitrogen gas into the reaction chamber through a gas inlet port, to thereby grow AlN whiskers on the surface of an Al 2 O 3 substrate placed in the reaction chamber.

First claim

The invention claimed is:

1. An AlN whisker body comprising a carbon substrate, an AlN polycrystal or AlN particle formed on the surface of the carbon substrate, and an AlN whisker bonded to the surface of the AlN polycrystal or the AlN particle.

2. An AlN whisker comprising
a fibrous AlN single crystal,
an oxygen atom-containing layer covering the AlN single crystal, and
a hydrophobic layer covering the oxygen atom-containing layer, wherein
the oxygen atom-containing layer is formed through incorporation of at least oxygen atoms into the AlN single crystal, and
the hydrophobic layer comprises a hydrocarbon group.

3. An AlN whisker according to claim 2 , wherein
the oxygen atom-containing layer is bonded to the hydrophobic layer by means of an ester bond.

4. An AlN whisker according to claim 2 , wherein
the oxygen atom-containing layer comprises at least one of Al 2 O 3 , AlON, and Al(OH) 3 .

5. An AlN whisker according to claim 2 , wherein
the oxygen atom-containing layer has a thickness of 7 nm to 500 nm.

6. A resin molded body comprising an AlN whisker having a first end and a second end, and a resin material covering the AlN whisker; wherein
the resin molded body comprises a first surface and a second surface opposite the first surface;
the first end of the AlN whisker is exposed at the first surface, and
the second end of the AlN whisker is exposed at the second surface,
wherein
the AlN whisker comprises a fibrous AlN single crystal, an oxygen atom-containing layer covering the AlN single crystal, and a hydrophobic layer covering the oxygen atom-containing layer;
the oxygen atom-containing layer is formed through incorporation of at least oxygen atoms by the AlN single crystal; and
the hydrophobic layer comprises a hydrocarbon group.

7. A resin molded body, comprising
an insulating particle,
a plurality of AlN whiskers covering the insulating particle, and
a resin covering the AlN whiskers, wherein
the AlN whisker comprises a fibrous AlN single crystal, an oxygen atom-containing layer covering the AlN single crystal, and a hydrophobic layer covering the oxygen atom-containing layer;
the oxygen atom-containing layer is formed through incorporation of at least oxygen atoms into the AlN single crystal; and
the hydrophobic layer comprises a hydrocarbon group.

8. A sintered body comprising:
an AlN whisker comprising a fibrous AlN single crystal and an oxygen atom-containing layer covering the AlN single crystal, and
one or more species of insulating particles covering the AlN whisker, wherein
the oxygen atom-containing layer is formed through incorporation of at least oxygen atoms into the AlN single crystal.

9. A sintered body according to claim 8 , wherein
the oxygen atom-containing layer has a thickness of 7 nm to 500 nm.

10. A sintered body according to claim 8 , wherein
the oxygen atom-containing layer comprises at least one of Al 2 O 3 , AlON, and Al(OH) 3 .

11. A sintered body according to claim 8 , wherein
the one or more species of insulating particles comprise AlN polycrystalline particles.

Assignees

• Univ Nagoya Nat Univ Corp

Inventors

• Ujihara Toru
• Takeuchi Yukihisa
• SHIOJIRI Daishi
• Matsumoto Masaki
• Saito Hiroshi
• Hayashi Ikuo

Classifications

• C04B35/581 Primary

  based on aluminium nitride · CPC title

• C30B29/38

  Nitrides · CPC title

• C30B29/62

  Whiskers or needles · CPC title

• C30B29/403 Primary

  AIII-nitrides · CPC title

• C30B25/005

  Growth of whiskers or needles · CPC title