Method for producing composite material
US-2024052186-A1 · Feb 15, 2024 · US
Methods for synthesizing high purity niobium or rhenium powders
US10934605B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10934605-B2 |
| Application number | US-201715786289-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 17, 2017 |
| Priority date | Feb 5, 2010 |
| Publication date | Mar 2, 2021 |
| Grant date | Mar 2, 2021 |
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- Title
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Abstract
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Methods are provided for synthesizing high purity niobium or rhenium powders by a combustion reaction. The methods can include: forming a combustion synthesis solution by dissolving in water an oxidizer, a fuel, and at least one base-soluble, ammonium salt of niobium or rhenium in amounts that yield a stoichiometric burn when combusted; and heating the combustion synthesis solution to a temperature sufficient to substantially remove the water and to initiate a self-sustaining combustion reaction.
First claim
Opening claim text (preview).
We claim: 1. A method for synthesizing rhenium powders by a combustion reaction, the method comprising: forming a combustion synthesis solution by dissolving in water an oxidizer, a fuel, and at least one base-soluble, ammonium salt of rhenium in amounts that yield a stoichiometric burn when combusted; and heating the combustion synthesis solution to a temperature sufficient to substantially remove the water and to initiate a self-sustaining combustion reaction and form a rhenium oxide intermediate; and heating the rhenium oxide intermediate for less than 6 hours in a reducing atmosphere at a temperature lower than 850° C. to form the rhenium powders; and cooling the rhenium powders to a temperature below 100° C. and then introducing an oxidizing gas to passivate the surface of the rhenium powders. 2. The method of claim 1 further comprising dissolving a nitrate reagent of an alloying metal in the combustion synthesis solution. 3. The method of claim 1 wherein the oxidizer comprises a nitrate reagent. 4. The method of claim 1 wherein the oxidizer comprises nitric acid. 5. The method of claim 1 wherein the oxidizer comprises ammonium nitrate. 6. The method of claim 1 wherein the fuel comprises glycine. 7. The method of claim 1 wherein the fuel comprises a complexing agent. 8. The method of claim 1 wherein the base-soluble ammonium salt of rhenium is ammonium perrhenate.
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Classifications
Alloys based on refractory metals · CPC title
- B22F9/24Primary
starting from liquid metal compounds, e.g. solutions · CPC title
Metallic powder characterised by particles having a nanoscale microstructure (nanosized particles B22F1/054) · CPC title
Oxides; Hydroxides · CPC title
having only one amino and one carboxyl group bound to the carbon skeleton · CPC title
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- What does patent US10934605B2 cover?
- Methods are provided for synthesizing high purity niobium or rhenium powders by a combustion reaction. The methods can include: forming a combustion synthesis solution by dissolving in water an oxidizer, a fuel, and at least one base-soluble, ammonium salt of niobium or rhenium in amounts that yield a stoichiometric burn when combusted; and heating the combustion synthesis solution to a tempera…
- Who is the assignee on this patent?
- Battelle Memorial Institute
- What technology area does this patent fall under?
- Primary CPC classification B22F9/24. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Mar 02 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).