Composite particle and method of producing composite particle

Patent metadata

Field	Value
Publication number	US-12486176-B2
Application number	US-201917766306-A
Country	US
Kind code	B2
Filing date	Oct 9, 2019
Priority date	Oct 9, 2019
Publication date	Dec 2, 2025
Grant date	Dec 2, 2025

Abstract

The composite particle of the present invention includes an alumina particle having a card-house structure which is formed of three or more pieces of plate-like alumina and in which the pieces of plate-like alumina are fixed to each other; and an inorganic coating part provided on a surface of the plate-like alumina.

First claim

The invention claimed is:

1 . A composite particle comprising:
an alumina particle having a card-house structure which is formed of three or more pieces of plate-like alumina and in which the pieces of plate-like alumina are fixed to each other; and an inorganic coating part provided on a surface of the plate-like alumina, and wherein the average particle size of the alumina particle is 3 μm or more and 1,000 μm or less, wherein the alumina particle further comprise at least one of silicon and germanium, and wherein a content of silicon with respect to 100% by mass of the alumina particles, which is obtained by XRF analysis, is 0.5% by weight to 4% by weight in terms of silicon dioxide (SiO 2 ); and a content of germanium with respect to 100% by weight of the alumina particles is 0.01% by weight to 8% by weight in terms of germanium dioxide (GeO 2 ).

2 . The composite particle according to claim 1 ,
wherein the inorganic coating part is made of an oxide.

3 . The composite particle according to claim 2 ,
wherein the oxide includes one or more selected from the group consisting of titanium oxide, iron oxide, and silica.

4 . The composite particle according to claim 1 ,
wherein the inorganic coating part is made of a metal.

5 . The composite particle according to claim 4 ,
wherein the includes one or more selected from the group consisting of silver, nickel, copper, gold, and platinum.

6 . The composite particle according to claim 1 ,
wherein the alumina particle comprises mullite in a surface layer.

Assignees

• Dainippon Ink & Chemicals

Inventors

• Li Meng
• Takada Shingo
• Dohi Tomoki
• Yuan Jianjun
• Liu Cheng
• Zhao Wei
• Yang Shaowei

Classifications

• B32B5/16

  characterised by features of a layer formed of particles, e.g. chips, powder {or granules (layer formed of natural mineral particles B32B19/00; layer being formed of wood fibres, chips or particles B32B21/02)} · CPC title

• C01P2006/21

  Attrition-index or crushing strength of granulates · CPC title

• C01P2004/84

  one phase coated with the other · CPC title

• C01P2004/61

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

• C01P2004/54

  Particles characterised by their aspect ratio, i.e. the ratio of sizes in the longest to the shortest dimension · CPC title