公开(公告)号：US11097948B2

公开(公告)日：2021-08-24

申请号：US16073608

申请日：2017-01-25

Applicant: TOKUYAMA CORPORATION

Inventor： Akimasa Kuramoto ,  Kikuo Yamamoto ,  Mou Ou ,  Saiko Fujii ,  Yukihiro Kanechika ,  Teruhiko Nawata

IPC: C01B21/072 ,  C08K3/28 ,  C08L101/00 ,  C09C1/40

Abstract: To provide an aluminum nitride particle having a hexagonal columnar barrel part and bowl-like projection parts at both ends of the columnar part, wherein the long diameter (D) of the barrel part is 10 to 250 μm, the ratio (L1/D) of the distance (L1) between the apexes of the two projection pars to the long diameter (D) of the barrel part is 0.7 to 1.3, and the percentage of the length or thickness (L2) of the barrel part to the distance (L1) between the apexes of the two projection parts is 10 to 60%. The aluminum nitride particle can provide high heat conductivity and excellent electric insulation to a resin when it is filled into the resin.

公开(公告)号：US11661494B2

公开(公告)日：2023-05-30

申请号：US17431966

申请日：2020-03-10

Applicant: TOKUYAMA CORPORATION

Inventor： Akimasa Kuramoto ,  Yukihiro Kanechika

IPC: C08K3/28 ,  C01B21/072

CPC classification number: C08K3/28 ,  C01B21/0726 ,  C01P2004/03 ,  C01P2006/12 ,  C08K2003/282 ,  C08K2201/006

Abstract: An aluminum nitride particle including at least a first truncated six-sided pyramid (1-a) and a second truncated six-sided pyramid (1-b), the aluminum nitride particle having a shape such that a lower base (3) of the first truncated six-sided pyramid (1-a) and a lower base (3) of the second truncated six-sided pyramid (1-b) face each other, the first truncated six-sided pyramid (1-a) and the second truncated six-sided pyramid (1-b) each having an upper base (2) with an area S1 of not less than 60 μm2 and not more than 4800 μm2, and each having a ratio (S1/S2) of the area S1 to an area S2 of the lower base (3) being not less than 0.5 and less than 1, the first truncated six-sided pyramid (1-a) and the second truncated six-sided pyramid (1-b) respectively having a height h1 and a height h2 each being not less than 5 μm and not more than 20 μm.

公开(公告)号：US11325830B2

公开(公告)日：2022-05-10

申请号：US16608576

申请日：2018-04-27

Applicant: TOKUYAMA CORPORATION

Inventor： Akimasa Kuramoto ,  Yukihiro Kanechika

IPC: C01B21/072 ,  C08K3/28

Abstract: An aluminum nitride particle including: a plurality of planes randomly arranged in a surface of the particle, the plurality of planes forming an obtuse ridge part or an obtuse valley part in the surface of the particle, the plurality of planes being observable in a scanning electron micrograph with 500 times magnification; wherein the particle has a longer diameter L of 20 to 200 μm; a ratio L/D of the longer diameter L (unit: μm) to a shorter diameter D (unit: μm) of the particle is 1 to 1.25; and the plurality of planes comprise a first plane, wherein an area S (unit: μm2) of the first plane satisfies S/L≥1.0 μm.