公开(公告)号：US20180065852A1

公开(公告)日：2018-03-08

申请号：US15258707

申请日：2016-09-07

Applicant: NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： KUAN-TING LAI ,  CHI-SHIUNG HSI ,  MIN-YU YANG

IPC: C01B21/072

CPC classification number: C01B21/0726 ,  C01P2002/72 ,  C01P2004/04 ,  C01P2004/32 ,  C09K5/14

Abstract: A method for preparing a spherical aluminum nitride granule includes (A) providing an aluminum oxide powder and a resin, followed by dissolving the aluminum oxide powder and the resin in a solvent to form a mixed slurry; (B) performing spray drying on the mixed slurry to form a spherical granule; (C) performing carbonization on the spherical granule in an inert atmosphere to form a carbonized spherical granule; (D) performing carbothermic reduction on the carbonized spherical granule in a nitrogen atmosphere to form a spherical aluminum nitride granule; (E) performing a densification sintering thermal treatment continuously on the spherical aluminum nitride granule in a nitrogen atmosphere; and (F) performing decarbonization on the densified spherical aluminum nitride granule in a nitrogen atmosphere to form densified spherical aluminum nitride sintered particles of tens of micrometers. Accordingly, the manufacturing process is simple and energy-saving.