Method for making amorphous particles using a uniform melt-state in a microwave generated plasma torch
US8951496B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2012 |
| Grant date | Feb 10, 2015 |
| Priority date | — |
| Expiry date | Mar 5, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/5481
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Feed material comprising uniform solution precursor droplets is processed in a uniform melt state using microwave generated plasma. The plasma torch employed is capable of generating laminar gas flows and providing a uniform temperature profile within the plasma. Plasma exhaust products are quenched at high rates to yield amorphous products. Products of this process include spherical, highly porous and amorphous oxide ceramic particles such as magnesia-yttria (MgO—Y2O3). The present invention can also be used to produce amorphous non oxide ceramic particles comprised of Boron, Carbon, and Nitrogen which can be subsequently consolidated into super hard materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.