Method for preparing spherical aluminum nitride powder with high flowability
AssigneeNational Chung Shan Institute of Science and Technology
InventorsJian-long Ruan, Cheng-hung Shih
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Abstract
A method for preparing spherical aluminum nitride powder with high flowability is provided and involves: (A) mixing aluminum nitride powder, a sintering aid, a dispersant, and a solvent through wet ball milling; (B) adding a binder and organic alcohol-based additive to form a mixed slurry via a second wet ball milling process; (C) atomizing the slurry into droplets; (D) drying the droplets to produce spherical granules; and (E) collecting granules with D50 of 60-90 μm, bulk density of 0.8-1.1 g/cm3, and an angle of repose <30°.
Claims7
A method for preparing spherical aluminum nitride powder with high flowability, comprising the steps of:
- (A) providing aluminum nitride powder, a sintering aid, a dispersant, and a solvent, and mixing them through a first wet ball milling process according to a first fixed weight ratio to obtain a mixture;
- (B) providing a binder and an organic alcohol-based additive, and adding them to the mixture obtained in step (A) according to a second fixed weight ratio, followed by a second wet ball milling process to form a mixed slurry;
- (C) atomizing the mixed slurry into droplets;
- (D) drying the atomized mixed slurry to obtain dried spherical aluminum nitride granules;
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- (E) collecting the dried spherical aluminum nitride granules to obtain spherical aluminum nitride powder with high flowability, characterized by an average particle size distribution D50 of 60-90 μm, a bulk density of 0.8-1.1 g/cm3, and an angle of repose of less than 30°.
Dependencies are inferred from the claim text.