Aluminum nitride synthesis from nut shells

Patent metadata

Field	Value
Publication number	US-11602158-B2
Application number	US-202017081216-A
Country	US
Kind code	B2
Filing date	Oct 27, 2020
Priority date	Nov 16, 2016
Publication date	Mar 14, 2023
Grant date	Mar 14, 2023

Abstract

Nano-structures of Aluminum Nitride and a method of producing nano-structures of Aluminum Nitride from nut shells comprising milling agricultural nuts into a fine nut powder, milling nanocrystalline Al 2 O 3 into a powder, mixing, pressing the fine nut powder and the powder of nanocrystalline Al 2 O 3 , heating the pellet, maintaining the temperature of the pellet at about 1400° C., cooling the pellet, eliminating the residual carbon, and forming nano-structures of AlN. An Aluminum Nitride (AlN) product made from the steps of preparing powders of agricultural nuts using ball milling, preparing powders of nanocrystalline Al 2 O 3 , mixing the powders of agricultural nuts and the powders of nanocrystalline Al 2 O 3 forming a homogenous sample powder of agricultural nuts and Al 2 O 3 , pressurizing, pyrolyzing the disk, and reacting the disk and the nitrogen atmosphere and forming AlN.

First claim

What we claim is:

1. A method of producing nano-structures of Aluminum Nitride from nut shells comprising:
milling agricultural nuts into a fine nut powder;
milling nanocrystalline Al 2 O 3 into a powder;
mixing the fine nut powder with the powder of nanocrystalline Al 2 O 3 ;
pressing the fine nut powder and the powder of nanocrystalline Al 2 O 3 into a pellet;
providing a nitrogen atmosphere;
heating the pellet to a temperature of about 1400° C.;
maintaining the temperature of the pellet at about 1400° C.;
cooling the pellet in air to a temperature of about 670° C.;
eliminating the residual carbon; and
forming nano-structures of AlN.

2. The method of producing nano-structures of Aluminum Nitride from nut shells of claim 1
wherein the step of maintaining the temperature of the pellet at about 1400° C. comprises an interval of 5-6 hours.

Assignees

• Us Gov Sec Navy

Inventors

• Qadri Syed B
• Rath Bhakta B
• Gorzkowski Iii Edward P

Classifications

• B02C17/20

  Disintegrating members · CPC title

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title

• C01P2002/82

  by IR- or Raman-data · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• C01P2004/04

  obtained by TEM, STEM, STM or AFM · CPC title