Aluminum nitride-based powder and method for producing same
US12281010B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 2018 |
| Grant date | Apr 22, 2025 |
| Priority date | — |
| Expiry date | Aug 16, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K2201/005
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
To provide an aluminum nitride-based powder that includes less amount of fine powder that is hard to be completely removed, has superior filling performance for a polymeric material, and also has thermal conductivity. The present invention relates to an aluminum nitride-based powder comprising aluminum nitride-based particles, wherein (1) the average particle size D50 is 15 to 200 μm; (2) a content of particles having a particle size of at most 5 μm is at most 60% on a particle number basis; (3) a content of an alkaline earth metal element and a rare-earth element is at most 0.1 weight %; (4) a content of oxygen is at most 0.5 weight %; and (5) a content of silicon is at most 1000 ppm by weight, and a content of iron is at most 1000 ppm by weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.