Tightly agglomerated non-oxide particles and method for producing the same
AssigneeWashington Unniversity
InventorsLee J. Rosen, Richard L. Axelbaum, Zhen Sun, Douglas P. DuFaux
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Abstract
A non-oxide powder of which at least about 40% by mass is comprised of a plurality of tightly agglomerated compositions, each of the tightly agglomerated compositions comprising a plurality of primary particles agglomerated together. Suitable materials for the primary particles include metals, intermetallics, ceramics, MMCs, and non-metals. An encapsulation and scavenging process is used to create the agglomerated compositions wherein at least some of the agglomerated compositions are encapsulated in a secondary material such as a salt or a polymer.
Claims76
A non-oxide powder of which at least about 40% by mass is comprised of a plurality of tightly agglomerated compositions, each of said tightly agglomerated compositions comprising a plurality of primary particles tightly agglomerated together, wherein said primary particles have an average size in a range of about 1 nanometer to about 500 nanometers, wherein for each tightly agglomerated composition, at least about 60% of its constituent primary particles are within 2.25 dN1/3 nanometers of at least about 60% of its other constituent primary particles, wherein N represents the number of primary particles in the tightly agglomerated composition, and wherein d represents the average size of the primary particles in the tightly agglomerated composition.
A powder comprising:
- a plurality of primary particles, each primary particle having a size in the range of about 1 nanometer to about 500 nanometers;
- and
- a secondary material within which at least some of said primary particles are encapsulated;
- wherein a plurality of said primary particles are agglomerated together;
- wherein between about 10% and about 100% of said primary particles are encapsulated in said secondary material;
- wherein said primary particles are selected from the group consisting of metals, intermetallics, metal matrix composites, ceramics, and non-metals;
- and
- wherein said secondary material is selected from the group consisting of salts and polymers.
A capacitor-grade powder of which at least about 40% by mass is comprised of a plurality of tight agglomerations of primary particles, each tight agglomeration comprising at least 20 primary particles, said primary particles having an average size in the range of about 1 nanometer to about 200 nanometers and being selected from the group consisting of valve metals, wherein for each of said tight agglomerations, at least about 60% of its constituent primary particles are within 2.25 dN1/3 nanometers of at least about 60% of its other constituent primary particles, wherein N represents the number of primary particles in the same tight agglomeration, and wherein d represents the average size of said primary particles.
A non-oxide powder of which at least about 40% by mass is comprised of a plurality of tightly agglomerated compositions, each of said tightly agglomerated compositions comprising a plurality of primary particles tightly agglomerated together, wherein said primary particles have an average size in a range of about 1 nanometer to about 100 nanometers, wherein said primary particles are selected from the group consisting of metals, intermetallics, metal matrix composites, ceramics, and non-metals, and wherein at least one of said tightly agglomerated compositions further comprises a secondary material within which the primary particles of said at least one agglomerated composition are encapsulated.
A non-oxide powder of which at least about 40% by mass is comprised of a plurality of tightly agglomerated compositions, each of said tightly agglomerated compositions comprising a plurality of primary particles tightly agglomerated together, wherein said primary particles have an average size in a range of about 1 nanometer to about 100 nanometers, wherein said primary particles are selected from the group consisting of intermetallics.
A non-oxide powder of which at least about 40% by mass is comprised of a plurality of tightly agglomerated compositions, each of said tightly agglomerated compositions comprising a plurality of primary particles tightly agglomerated together, wherein said primary particles have an average size in a range of about 1 nanometer to about 100 nanometers, wherein said primary particles are selected from the group consisting of metal matrix composites.
Dependencies are inferred from the claim text.