Metal hydride nanoparticles

Patent metadata

Field	Value
Publication number	US-11939276-B2
Application number	US-202017110659-A
Country	US
Kind code	B2
Filing date	Dec 3, 2020
Priority date	Dec 2, 2016
Publication date	Mar 26, 2024
Grant date	Mar 26, 2024

Abstract

A nanoparticle of a decomposition product of a transition metal aluminum hydride compound, a transition metal borohydride compound, or a transition metal gallium hydride compound. A process of: reacting a transition metal salt with an aluminum hydride compound, a borohydride compound, or a gallium hydride compound to produce one or more of the nanoparticles. The reaction occurs in solution while being sonicated at a temperature at which the metal hydride compound decomposes. A process of: reacting a nanoparticle with a compound containing at least two hydroxyl groups to form a coating having multi-dentate metal-alkoxides.

First claim

What is claimed is:

1. A nanopowder made by a process comprising:
reacting Ti(BH 4 ) 3 with LiAlH 4 in an aprotic solvent while being sonicated to produce nanoparticles comprising titanium, boron, and hydrogen;
wherein the molar ratio of Ti(BH 4 ) 3 to LiAlH 4 is from 1:1 to 1,000,000:1; and

annealing the nanoparticles under a vacuum;
wherein the nanopowder comprises at least 90 wt. % elemental amorphous titanium and elemental amorphous boron.

2. The nanopowder of claim 1 , wherein the molar ratio of Ti(BH 4 ) 3 to LiAlH 4 is from 1:1 to 12:1.

3. The nanopowder of claim 1 , wherein the aprotic solvent is diethyl ether.

4. The nanopowder of claim 1 , wherein the sonication is performed at −15° C. to 97° C.

5. The nanopowder of claim 1 , wherein the annealing is from 50° C. to 2000° C.

6. The nanopowder of claim 1 , wherein the nanopowder comprises no more than 5 wt. % of total crystalline titanium or boron, alloyed titanium and boron, and titanium-boron compounds.

Assignees

• Us Gov Sec Navy

Inventors

• Epshteyn Albert
• Huba Zachary J

Classifications

• C06B43/00 Primary

  Compositions characterised by explosive or thermic constituents not provided for in groups C06B25/00 - C06B41/00 · CPC title

• C01B6/23 Primary

  Preparation of borohydrides of other metals, e.g. aluminium borohydride; Addition complexes thereof, e.g. Li[Al(BH4)3H] · CPC title

• C01B6/243

  containing only hydrogen, aluminium and alkali metals, e.g. Li(AlH4) · CPC title

• C01P2002/02

  Amorphous compounds · CPC title

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title