公开(公告)号：US20210238465A1

公开(公告)日：2021-08-05

申请号：US16972307

申请日：2019-05-23

Applicant: SHOWA DENKO K.K.

Inventor： Yuki OTSUKA ,  Hidetoshi OKAMOTO

IPC: C09K5/14 ,  C09C1/40 ,  C08K9/02 ,  C08K3/28

Abstract: A method of producing glass-coated aluminum nitride particles which includes a first step of mixing, while applying a shearing force by a mechano-chemical method, a mixture of aluminum nitride particles, and a composition powder containing a glass component, a second step of heat treating the mixture at a temperature of the glass transition temperature of the glass component or more, and 2000° C. or less, and a third step of crushing the heat treated product.

公开(公告)号：US20200339419A1

公开(公告)日：2020-10-29

申请号：US16955493

申请日：2018-12-10

Applicant: SHOWA DENKO K.K.

Inventor： Yuki OTSUKA ,  Hidetoshi OKAMOTO

IPC: C01B21/072 ,  C09C1/00

Abstract: Glass-coated aluminum nitride particles and a method for producing the same. The glass-coated aluminum nitride particles include aluminum nitride particles and a glass phase which covers at least a part of the surface of each aluminum nitride particle. The glass phase is a composition which contains at least a glass component; and the proportion of the composition containing a glass component is 0.2 parts by weight to 5.0 parts by weight with respect to 100 parts by weight of the aluminum nitride particles. The composition containing the glass component further contains boron nitride particle; and the aluminum nitride particles have a volume cumulative d50 of from 10 μm to 200 μm.

公开(公告)号：US20220119619A1

公开(公告)日：2022-04-21

申请号：US17434578

申请日：2020-07-30

Applicant: SHOWA DENKO K.K.

Inventor： Hajime YUKUTAKE ,  Yuki OTSUKA ,  Naoki MINORIKAWA ,  Hidetoshi OKAMOTO ,  Toshihiro ARAI

IPC: C08K3/22 ,  C08K3/28 ,  C08L83/04 ,  C08K9/06

Abstract: An inorganic particle dispersion resin composition, containing: a resin; and inorganic particles, in which the inorganic particles include silica-covered aluminum nitride particles and alumina particles, and the silica-covered aluminum nitride particles include aluminum nitride particles and a silica film covering surfaces of the aluminum nitride particles. A total content of the inorganic particles is preferably in a range of greater than or equal to 60.0 volume % and less than or equal to 85.0 volume %.

公开(公告)号：US20210309861A1

公开(公告)日：2021-10-07

申请号：US17270202

申请日：2019-08-23

Applicant: SHOWA DENKO K.K.

Inventor： Yuki OTSUKA ,  Hidetoshi OKAMOTO ,  Naoki MINORIKAWA

IPC: C09C3/12 ,  C09C1/40

Abstract: A method of manufacturing a silicon-containing oxide-coated aluminum nitride particle; a method of manufacturing a heat dispersing resin composition containing the silicon-containing oxide-coated aluminum nitride particle; and the silicon-containing oxide-coated aluminum nitride particle. The method of manufacturing includes: a first step of covering the surface of the aluminum nitride particle with an organic silicone compound including a specific structure; and a second step of heating the aluminum nitride particle covered with the organic silicone compound at a temperature of 300° C. or more and less than 1000° C., wherein the content of carbon atoms in the silicon-containing oxide-coated aluminum nitride particle is less than 1000 ppm by mass.