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US 6,228,904 B1Granted
Nanostructured fillers and carriers
AssigneeNanomaterials Research Corporation
InventorsTapesh Yadav, Clayton Kostelecky, Evan Franke, Bijan Miremadi, Ming Au
Life of this patent
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Abstract
A nanocomposite structure comprising a nanostructured filler or carrier intimately mixed with a matrix, and methods of making such a structure. The nanostructured filler has a domain size sufficiently small to alter an electrical, magnetic, optical, electrochemical, chemical, thermal, biomedical, or tribological property of either filler or composite by at least 20%.
Claims26
A method of producing a composite material, comprising:
- providing a polymer matrix material;
- providing a nanostructured filler in powder form having a domain size of less than about 100 nanometers, wherein the nanostructured filler comprises a material selected from the group consisting of indium tin oxide, reduced indium tin oxide, dielectrics, ferrites, manganates;
- and
- mixing the nanostructured filler intimately with the matrix material at a filler loading selected to cause the composite material to have a resistivity that differs by more than 20% as compared with the resistivity exhibited by a composite material of similar composition with filler particles having a domain size of at least one micron;
- wherein the providing of the nanostructured filler includes applying a coating material to the exterior surface of the nanostructured filler and wherein the coating material comprises the matrix material.
2 more elements
A composite material, comprising:
- a solid matrix material;
- and
- a powder filler mechanically assembled with the matrix material such that the matrix material and the filler retain their identifying properties, wherein the filler comprises particles with a domain size less than about 100 nanometers, the particles comprising reduced indium tin oxide.
A composite material, comprising:
- a matrix material;
- and
- a nanostructured filler comprising manganate intimately mixed with the matrix material, wherein the nanostructured filler comprises particles with a domain size of less than about 100 nanometers and is selected to cause the composite material to have a resistivity that differs by more than 20% as compared with the resistivity exhibited by a composite material of similar composition with filler particles having a domain size of at least one micron.
A varistor device with a current-voltage response defined by a varistor power-law equation, I=n*Vα, where a is a voltage parameter, the varistor device comprising:
- a pair of electrodes;
- and
- a composite material interposed between the electrodes, the composite material including an matrix material intimately mixed with a nanostructured filler comprising particles having domain sizes of less than about 100 nanometers;
- wherein the nanostructured filler and a filler loading in the composite material are selected such that the voltage parameter, α, for the varistor device is at least 20 percent greater than a varistor device having a composite material of similar composition with filler particles having an average domain size of at least 1 micron.
1 more element
A battery, comprising:
- an anode;
- and
- a nanocomposite cathode comprising a composite material including a matrix and a nanostructured filler of particles having a domain size of less than about 100 nanometers;
- wherein the battery has a power density that is greater by more than 100 percent as compared with the power density exhibited by a battery having a cathode fabricated from composite materials of equivalent composition and average filler domain sizes greater than about 1 micron.
1 more element
A composite material, comprising:
- a solid matrix material;
- and
- a powder filler mechanically assembled with the matrix material such that the matrix material and the filler retain their identifying properties, wherein the filler comprises particles with a domain size less than about 100 nanometers, the particles comprising a material selected from the group consisting of multimetal oxide, hydroxides, borides, phosphides, and silicides and being coated with a polymer that is water soluble or water insoluble.
A composite material, comprising:
- a matrix material;
- and
- a nanostructured filler comprising reduced indium tin oxide intimately mixed with the matrix material, wherein the nanostructured filler comprises particles with a domain size of less than about 100 nanometers and is selected to cause the composite material to have a resistivity that differs by more than 20% as compared with the resistivity exhibited by a composite material of similar composition with filler particles having a domain size of at least one micron.
A method of producing a composite material comprising the acts of:
- providing a matrix material;
- and
- providing a nanostructured filler in powder form having a domain size of less than about 100 nanometers, wherein the nanostructured filler comprises reduced indium tin oxide.
Dependencies are inferred from the claim text.