Tightly agglomerated non-oxide particles and method for producing the same

• US 20030075011A1
• Filed: 10/09/2001
• Published: 04/24/2003
• Est. Priority Date: 10/09/2001
• Status: Active Grant

• Current Assignee: Washington University In St Louis
• Original Assignee: Washington University In St Louis
• Inventors: Sun, Zhen, Axelbaum, Richard L., Rosen, Lee J., DuFaux, Douglas P.
• Granted Patent: US 7,442,227 B2
• Time in Patent Office: Days
• US Class Current: 75/228
• CPC Class Codes: B01J 2/00 Processes or devices for granulating materials , e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
• CPC Class Codes: B22F 1/052 characterised by a mixture of particles of different sizes or by the particle size distribution
• CPC Class Codes: B22F 1/054 Nanosized particles
• CPC Class Codes: B22F 1/056 Submicron particles having a size above 100 nm up to 300 nm
• CPC Class Codes: B22F 1/148 Agglomerating
• CPC Class Codes: B22F 1/16 Metallic particles coated with a non-metal coated with lubricating or binding agents or with organic material B22F1/10
• CPC Class Codes: B22F 9/12 starting from gaseous material
• CPC Class Codes: B22F 9/28 starting from gaseous metal compounds
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: C22C 1/1031 starting from gaseous compounds or vapours of at least one of the constituents
• CPC Class Codes: H01G 9/0525 Powder therefor
• CPC Class Codes: Y10S 977/775 Nanosized powder or flake, e.g. nanosized catalyst
• CPC Class Codes: Y10S 977/776 Ceramic powder or flake
• CPC Class Codes: Y10S 977/777 Metallic powder or flake

Abstract

A non-oxide powder of which at least about 40% by mass is comprised of a plurality of tightly agglomerated compositions, each of the tightly agglomerated compositions comprising a plurality of primary particles agglomerated together. Suitable materials for the primary particles include metals, intermetallics, ceramics, MMCs, and non-metals. An encapsulation and scavenging process is used to create the agglomerated compositions wherein at least some of the agglomerated compositions are encapsulated in a secondary material such as a salt or a polymer.

Claims