Method and transferred arc plasma system for production of fine and ultrafine powders
US6379419B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 1998 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Aug 18, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2999/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention is concerned with a method for the production of fine and ultrafine powders of various materials such as metals, alloys, ceramics, composites etc., through a transferred arc plasma system. The method comprises vaporizing or decomposing the material in the plasma reactor, condensing the vapor in a quench tube comprising two sections, the first one for indirectly cooling or heating the vapor, and the second one for directly cooling the vapor. The powder is recovered in a conventional collection unit. The two step condensation in the quench tube allows a substantial control of powder properties like crystallinity, size distribution and mean particle size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.