发明名称 |
SPHERICAL BORON NITRIDE FINE PARTICLES AND PRODUCTION METHOD THEREOF |
摘要 |
A spherical boron nitride fine particle suited for use as a highly thermoconductive filler or the like has an average particle diameter of 0.01 to 1.0 μm, an orientation index of 1 to 15, a boron nitride purity of 98.0% by mass or greater, and an average circularity of 0.80 or greater. A method of producing a spherical boron nitride fine particle includes reacting ammonia with an alkoxide borate at an ammonia/alkoxide borate molar ratio of 1 to 10 in an inert gas stream at 750° C. or higher within 30 seconds, then applying heat treatment to a reaction product in an atmosphere of ammonia gas or a mixed gas of ammonia gas and an inert gas at 1,000 to 1,600° C. for at least 1 hour, and further firing the reaction product in an inert gas atmosphere at 1,800 to 2,200° C. for at least 0.5 hour. |
申请公布号 |
US2016368769(A1) |
申请公布日期 |
2016.12.22 |
申请号 |
US201515117853 |
申请日期 |
2015.02.09 |
申请人 |
DENKA COMPANY LIMITED ;NATIONAL INSTITUTE FOR MATERIALS SCIENCE |
发明人 |
KUROKAWA Fumihiro;KOBAYASHI Seitaro;KAWASAKI Takashi;TAKEDA Go;BANDO Yoshio;GOLBERG Dmitri |
分类号 |
C01B21/064 |
主分类号 |
C01B21/064 |
代理机构 |
|
代理人 |
|
主权项 |
1. A spherical boron nitride fine particle, characterized by having an average particle diameter of 0.01 to 1.0 μm, an orientation index of 1 to 15, a boron nitride purity of 98.0% by mass or greater, and an average circularity of 0.80 or greater. |
地址 |
Tokyo JP |