Process and apparatus for the production of nanometer-sized powders
US6398125B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 2001 |
| Grant date | Jun 4, 2002 |
| Priority date | — |
| Expiry date | Feb 10, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/34
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A two-stage process and apparatus for producing nanometer-scaled powders from a metal, the process including (a) operating a first-stage heating and atomizing device to provide a stream of super-heated fine-sized metal liquid droplets into a chamber of a second-stage atomizing device; (b) operating this second-stage atomizing device by directing an atomizing fluid medium to impinge upon the stream of super-heated metal liquid droplets to further break up the metal liquid droplets into substantially nanometer-sized particles; and (c) cooling these particles to form nanometer-sized solid powders. The first-stage heating and atomizing device preferably includes a twin-wire arc spray device. The second-stage atomizing device preferably includes a vortex jet nozzle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.