	US 12,281,010 B2
	Aluminum nitride-based powder and method for producing same
Takamasa Tanaka, Osaka (JP); Jun Kusui, Osaka (JP); Katsumi Nakashima, Osaka (JP); Kazuya Higashimura, Osaka (JP); and Shuhei Kanno, Osaka (JP)
Assigned to Toyo Aluminium Kabushiki Kaisha, Osaka (JP)
Appl. No. 16/615,498
Filed by Toyo Aluminium Kabushiki Kaisha, Osaka (JP)
PCT Filed May 17, 2018, PCT No. PCT/JP2018/019074 § 371(c)(1), (2) Date Jan. 21, 2020, PCT Pub. No. WO2018/216591, PCT Pub. Date Nov. 29, 2018.
Claims priority of application No. 2017-101283 (JP), filed on May 22, 2017.
Prior Publication US 2020/0140276 A1, May 7, 2020
Int. Cl. C01B 21/072 (2006.01); C08K 3/28 (2006.01)

CPC C01B 21/072 (2013.01) [C08K 3/28 (2013.01); C01P 2004/03 (2013.01); C01P 2004/60 (2013.01); C08K 2003/282 (2013.01)]

11 Claims

1. An aluminum nitride-based powder comprising aluminum nitride-based particles, wherein

(1) an average particle diameter D50 is 15 to 200 μm;

(2) a content of particles having a particle diameter of 5 μm or less is not more than 60% on a particle number basis;

(3) a content of an alkaline earth metal element and a rare-earth element is not more than 0.1 weight %;

(4) a content of oxygen is not more than 0.2 weight %;

(5) a content of silicon is not more than 1000 ppm by weight, and a content of iron is not more than 1000 ppm by weight, and

(6) a BET specific surface area of the aluminum nitride-based powder is 0.05 to 0.1 m²/g.