Production of nanocrystalline metal powders via combustion reaction synthesis
US9802834B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 2010 |
| Grant date | Oct 31, 2017 |
| Priority date | — |
| Expiry date | Nov 2, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N23/20075
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Nanocrystalline metal powders comprising tungsten, molybdenum, rhenium and/or niobium can be synthesized using a combustion reaction. Methods for synthesizing the nanocrystalline metal powders are characterized by forming a combustion synthesis solution by dissolving in water an oxidizer, a fuel, and a base-soluble, ammonium precursor of tungsten, molybdenum, rhenium, or niobium in amounts that yield a stoichiometric burn when combusted. The combustion synthesis solution is then heated to a temperature sufficient to substantially remove water and to initiate a self-sustaining combustion reaction. The resulting powder can be subsequently reduced to metal form by heating in a reducing gas environment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.