Highly transparent aluminum nitride single crystalline layers and devices made therefrom
US-9840790-B2 · Dec 12, 2017 · US
Process for producing spherical aluminum nitride powder and spherical aluminum nitride powder produced by the same process
US9199848B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9199848-B2 |
| Application number | US-201113516268-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 31, 2011 |
| Priority date | Jan 29, 2010 |
| Publication date | Dec 1, 2015 |
| Grant date | Dec 1, 2015 |
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Abstract
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To provide a process capable of efficiently producing a spherical aluminum nitride powder having a size most suited for use as a filler, and having a high sphericalness and a large particle strength. A spherical aluminum nitride powder is produced by using a spherical granulated product of an alumina powder or an alumina hydrate powder as a starting material, and feeding the spherical granulated product to the step of reductive nitrogenation so as to be reductively nitrogenated.
First claim
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The invention claimed is: 1. A process for producing a spherical aluminum nitride powder by using a spherical granulated product of an alumina powder or an alumina hydrate powder as a starting material, and feeding said spherical granulated product to the step of reductive nitrogenation so as to be reductively nitrogenated; wherein said spherical granulated product of said alumina powder or said alumina hydrate powder has a BET specific surface area of 30 to 500 m 2 /g; further…
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Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
- C01B21/072Primary
Chemistry & Metallurgy · mapped topic
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- What does patent US9199848B2 cover?
- To provide a process capable of efficiently producing a spherical aluminum nitride powder having a size most suited for use as a filler, and having a high sphericalness and a large particle strength. A spherical aluminum nitride powder is produced by using a spherical granulated product of an alumina powder or an alumina hydrate powder as a starting material, and feeding the spherical gra…
- Who is the assignee on this patent?
- Watanabe Kazutaka, Yoneda Takehiko, Tokuyama Corp
- What technology area does this patent fall under?
- Primary CPC classification C01B21/072. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Dec 01 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).