Method for producing aluminum nitride powder, aluminum nitride powder, and package
AssigneeTokuyama Corporation
InventorsYasuyuki Yamamoto, Hideki Satou
Life of this patent
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Abstract
To produce aluminum nitride in the form of a lump that can easily be broken down by light pulverization, which could not be obtained by a conventional combustion synthesis method. A method for producing aluminum nitride powder by a combustion synthesis method using a metallic aluminum powder, characterized in that a powder mixture in which an aluminum nitride powder having an average primary particle diameter of 3 μm or less as a diluent is mixed with a metallic aluminum powder in a ratio of 150 to 400 parts by mass of the aluminum nitride powder relative to 100 parts by mass of the metallic aluminum powder, is ignited to combust in a nitrogen atmosphere.
Claims5
A method for producing an aluminum nitride powder by a combustion synthesis method, the method comprising:
- mixing an aluminum nitride powder having an average primary particle diameter of 3 μm or less as a diluent with a metallic aluminum powder in a ratio of 150 to 400 parts by mass of the aluminum nitride powder relative to 100 parts by mass of the metallic aluminum powder to form a powder mixture,
- igniting the powder mixture to combust in a nitrogen atmosphere to obtain an aluminum nitride lump,
- disaggregating the aluminum nitride lump to form the aluminum nitride powder, wherein the aluminum nitride powder comprises aggregated particles of aluminum nitride primary particles having an average primary particle diameter of 3 μm or less, wherein the aggregated particles have an average particle diameter that exceeds the average primary particle diameter but is 4 μm to 20 μm,
- wherein a part of the aluminum nitride powder obtained after disaggregating is used as the diluent when the process is repeated.
Dependencies are inferred from the claim text.