Patent
US 10,163,538METHOD OF PREPARING GRAPHENE-COATED ALUMINA AND GRAPHENE-COATED ALUMINA PREPARED USING THE METHOD
Jianhong LIU
US
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Atlas literature
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US 10,163,538Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 is a SEM pattern of a product prepared in Example 1, where the product is prepared at a calcination temperature of 800 0C; [0026]
FIG. 2 is a SEM pattern of a product prepared in Example 2, where the product is prepared at a calcination temperature of 900 0C; [0027]
FIG. 3 is an XRD pattern of a product prepared in Example 2, where the product is graphene-coated alumina; and [0028]
FIG. 4 is a Raman spectrogram of a product prepared in Example 2, where the product is graphene-coated alumina.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method of preparing graphene-coated alumina, the method comprising: (1) preparing a liquid polyacrylonitrile (LPAN) solution as a carbon source, stirring the LPAN solution at a temperature of between 100 and 200 ° C for between 100 and 200 hrs to yield a cyclized polyacrylonitrile solution (cyclized LPAN solution); (2) heating the cyclized LPAN solution at between 200 and 300 ° C for between 1 and 10 hrs to yield thermally-oxidized polyacrylonitrile (OPAN); (3) mixing the OPAN with an aluminum compound at a mass ratio of the OPAN to the aluminum compound of between 0.1: 1 and 0.9: 1 to yield a mixture, and mixing the mixture with a solvent to yield a polyacrylonitrile-coated aluminum compound; (4) drying the polyacrylonitrile-coated aluminum compound at a temperature of between 200 and 250 ° C for between 1 and 10 hrs to yield a carbonized precursor-coated aluminum compound; and (5) calcining the carbonized precursor-coated aluminum compound in the presence of an inert gas having a flow rate of between 10 and 500 mL/min for between 1 and 10 hrs at a temperature of between 1600 and 2000 ° C to yield graphene-coated alumina; wherein: the aluminum compound is alumina; the graphene-coated alumina comprises alumina particles coated with graphene; and the alumina particles have a particle size of between 8 nm and 100 pm. Previously presented
The method of claim 1, wherein in (1), a dopant is added to and uniformly mixed with the cyclized LPAN solution. Previously presented
The method of claim 1, wherein in (1), a solute of the LPAN solution is liquid polyacrylonitrile having a relative molecular weight of between 106 and 100000. Previously presented
The method of claim 1, wherein in (3), the mixture and the solvent are mixed by stirring, ultrasound, or ball milling. Previously presented
Graphene-coated alumina prepared according to the method of claim 1. Original
Canceled
Materials described outside the worked examples.
graphene-coated alumina
liquid polyacrylonitrile (LPAN)
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 1 is a SEM pattern of a product prepared in Example 1, where the product is prepared at a calcination temperature of 800 0C; [0026]
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Particle Size | 8–100000 nm | graphene-coated alumina |
Temperature | 100–200 °C |
Related documents with shared materials, methods, properties, or citations.
METHODS FOR PRODUCING COMPOSITE GAN NANOCOLUMNS AND LIGHT EMITTING STRUCTURES MADE FROM THE METHODS
Ultrafast dynamics of carriers, coherent acoustic phonons and strain pulses in BiSbTe1.5Se1.5 topological insulator thin films
Patent
Atlas literature
Patent
US 10,163,538Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 is a SEM pattern of a product prepared in Example 1, where the product is prepared at a calcination temperature of 800 0C; [0026]
FIG. 2 is a SEM pattern of a product prepared in Example 2, where the product is prepared at a calcination temperature of 900 0C; [0027]
FIG. 3 is an XRD pattern of a product prepared in Example 2, where the product is graphene-coated alumina; and [0028]
FIG. 4 is a Raman spectrogram of a product prepared in Example 2, where the product is graphene-coated alumina.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method of preparing graphene-coated alumina, the method comprising: (1) preparing a liquid polyacrylonitrile (LPAN) solution as a carbon source, stirring the LPAN solution at a temperature of between 100 and 200 ° C for between 100 and 200 hrs to yield a cyclized polyacrylonitrile solution (cyclized LPAN solution); (2) heating the cyclized LPAN solution at between 200 and 300 ° C for between 1 and 10 hrs to yield thermally-oxidized polyacrylonitrile (OPAN); (3) mixing the OPAN with an aluminum compound at a mass ratio of the OPAN to the aluminum compound of between 0.1: 1 and 0.9: 1 to yield a mixture, and mixing the mixture with a solvent to yield a polyacrylonitrile-coated aluminum compound; (4) drying the polyacrylonitrile-coated aluminum compound at a temperature of between 200 and 250 ° C for between 1 and 10 hrs to yield a carbonized precursor-coated aluminum compound; and (5) calcining the carbonized precursor-coated aluminum compound in the presence of an inert gas having a flow rate of between 10 and 500 mL/min for between 1 and 10 hrs at a temperature of between 1600 and 2000 ° C to yield graphene-coated alumina; wherein: the aluminum compound is alumina; the graphene-coated alumina comprises alumina particles coated with graphene; and the alumina particles have a particle size of between 8 nm and 100 pm. Previously presented
The method of claim 1, wherein in (1), a dopant is added to and uniformly mixed with the cyclized LPAN solution. Previously presented
The method of claim 1, wherein in (1), a solute of the LPAN solution is liquid polyacrylonitrile having a relative molecular weight of between 106 and 100000. Previously presented
The method of claim 1, wherein in (3), the mixture and the solvent are mixed by stirring, ultrasound, or ball milling. Previously presented
Graphene-coated alumina prepared according to the method of claim 1. Original
Canceled
Materials described outside the worked examples.
graphene-coated alumina
liquid polyacrylonitrile (LPAN)
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 1 is a SEM pattern of a product prepared in Example 1, where the product is prepared at a calcination temperature of 800 0C; [0026]
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Particle Size | 8–100000 nm | graphene-coated alumina |
Temperature | 100–200 °C |
Related documents with shared materials, methods, properties, or citations.
METHODS FOR PRODUCING COMPOSITE GAN NANOCOLUMNS AND LIGHT EMITTING STRUCTURES MADE FROM THE METHODS
Ultrafast dynamics of carriers, coherent acoustic phonons and strain pulses in BiSbTe1.5Se1.5 topological insulator thin films
Patent
Atlas literature
Patent
US 10,163,538Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 is a SEM pattern of a product prepared in Example 1, where the product is prepared at a calcination temperature of 800 0C; [0026]
FIG. 2 is a SEM pattern of a product prepared in Example 2, where the product is prepared at a calcination temperature of 900 0C; [0027]
FIG. 3 is an XRD pattern of a product prepared in Example 2, where the product is graphene-coated alumina; and [0028]
FIG. 4 is a Raman spectrogram of a product prepared in Example 2, where the product is graphene-coated alumina.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method of preparing graphene-coated alumina, the method comprising: (1) preparing a liquid polyacrylonitrile (LPAN) solution as a carbon source, stirring the LPAN solution at a temperature of between 100 and 200 ° C for between 100 and 200 hrs to yield a cyclized polyacrylonitrile solution (cyclized LPAN solution); (2) heating the cyclized LPAN solution at between 200 and 300 ° C for between 1 and 10 hrs to yield thermally-oxidized polyacrylonitrile (OPAN); (3) mixing the OPAN with an aluminum compound at a mass ratio of the OPAN to the aluminum compound of between 0.1: 1 and 0.9: 1 to yield a mixture, and mixing the mixture with a solvent to yield a polyacrylonitrile-coated aluminum compound; (4) drying the polyacrylonitrile-coated aluminum compound at a temperature of between 200 and 250 ° C for between 1 and 10 hrs to yield a carbonized precursor-coated aluminum compound; and (5) calcining the carbonized precursor-coated aluminum compound in the presence of an inert gas having a flow rate of between 10 and 500 mL/min for between 1 and 10 hrs at a temperature of between 1600 and 2000 ° C to yield graphene-coated alumina; wherein: the aluminum compound is alumina; the graphene-coated alumina comprises alumina particles coated with graphene; and the alumina particles have a particle size of between 8 nm and 100 pm. Previously presented
The method of claim 1, wherein in (1), a dopant is added to and uniformly mixed with the cyclized LPAN solution. Previously presented
The method of claim 1, wherein in (1), a solute of the LPAN solution is liquid polyacrylonitrile having a relative molecular weight of between 106 and 100000. Previously presented
The method of claim 1, wherein in (3), the mixture and the solvent are mixed by stirring, ultrasound, or ball milling. Previously presented
Graphene-coated alumina prepared according to the method of claim 1. Original
Canceled
Materials described outside the worked examples.
graphene-coated alumina
liquid polyacrylonitrile (LPAN)
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 1 is a SEM pattern of a product prepared in Example 1, where the product is prepared at a calcination temperature of 800 0C; [0026]
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Particle Size | 8–100000 nm | graphene-coated alumina |
Temperature | 100–200 °C |
Related documents with shared materials, methods, properties, or citations.
METHODS FOR PRODUCING COMPOSITE GAN NANOCOLUMNS AND LIGHT EMITTING STRUCTURES MADE FROM THE METHODS
Ultrafast dynamics of carriers, coherent acoustic phonons and strain pulses in BiSbTe1.5Se1.5 topological insulator thin films
Patent
Atlas literature
Patent
US 10,163,538Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 is a SEM pattern of a product prepared in Example 1, where the product is prepared at a calcination temperature of 800 0C; [0026]
FIG. 2 is a SEM pattern of a product prepared in Example 2, where the product is prepared at a calcination temperature of 900 0C; [0027]
FIG. 3 is an XRD pattern of a product prepared in Example 2, where the product is graphene-coated alumina; and [0028]
FIG. 4 is a Raman spectrogram of a product prepared in Example 2, where the product is graphene-coated alumina.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method of preparing graphene-coated alumina, the method comprising: (1) preparing a liquid polyacrylonitrile (LPAN) solution as a carbon source, stirring the LPAN solution at a temperature of between 100 and 200 ° C for between 100 and 200 hrs to yield a cyclized polyacrylonitrile solution (cyclized LPAN solution); (2) heating the cyclized LPAN solution at between 200 and 300 ° C for between 1 and 10 hrs to yield thermally-oxidized polyacrylonitrile (OPAN); (3) mixing the OPAN with an aluminum compound at a mass ratio of the OPAN to the aluminum compound of between 0.1: 1 and 0.9: 1 to yield a mixture, and mixing the mixture with a solvent to yield a polyacrylonitrile-coated aluminum compound; (4) drying the polyacrylonitrile-coated aluminum compound at a temperature of between 200 and 250 ° C for between 1 and 10 hrs to yield a carbonized precursor-coated aluminum compound; and (5) calcining the carbonized precursor-coated aluminum compound in the presence of an inert gas having a flow rate of between 10 and 500 mL/min for between 1 and 10 hrs at a temperature of between 1600 and 2000 ° C to yield graphene-coated alumina; wherein: the aluminum compound is alumina; the graphene-coated alumina comprises alumina particles coated with graphene; and the alumina particles have a particle size of between 8 nm and 100 pm. Previously presented
The method of claim 1, wherein in (1), a dopant is added to and uniformly mixed with the cyclized LPAN solution. Previously presented
The method of claim 1, wherein in (1), a solute of the LPAN solution is liquid polyacrylonitrile having a relative molecular weight of between 106 and 100000. Previously presented
The method of claim 1, wherein in (3), the mixture and the solvent are mixed by stirring, ultrasound, or ball milling. Previously presented
Graphene-coated alumina prepared according to the method of claim 1. Original
Canceled
Materials described outside the worked examples.
graphene-coated alumina
liquid polyacrylonitrile (LPAN)
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 1 is a SEM pattern of a product prepared in Example 1, where the product is prepared at a calcination temperature of 800 0C; [0026]
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Particle Size | 8–100000 nm | graphene-coated alumina |
Temperature | 100–200 °C |
Related documents with shared materials, methods, properties, or citations.
METHODS FOR PRODUCING COMPOSITE GAN NANOCOLUMNS AND LIGHT EMITTING STRUCTURES MADE FROM THE METHODS
Ultrafast dynamics of carriers, coherent acoustic phonons and strain pulses in BiSbTe1.5Se1.5 topological insulator thin films
thermally-oxidized polyacrylonitrile (OPAN)
alumina
Al₂O₃
dopant
FIG. 2 is a SEM pattern of a product prepared in Example 2, where the product is prepared at a calcination temperature of 900 0C; [0027]
FIG. 3 is an XRD pattern of a product prepared in Example 2, where the product is graphene-coated alumina; and [0028]
FIG. 4 is a Raman spectrogram of a product prepared in Example 2, where the product is graphene-coated alumina.
| — |
Temperature | 200–300 °C | — |
Temperature | 200–250 °C | — |
Temperature | 1600–2000 °C | — |
thermally-oxidized polyacrylonitrile (OPAN)
alumina
Al₂O₃
dopant
FIG. 2 is a SEM pattern of a product prepared in Example 2, where the product is prepared at a calcination temperature of 900 0C; [0027]
FIG. 3 is an XRD pattern of a product prepared in Example 2, where the product is graphene-coated alumina; and [0028]
FIG. 4 is a Raman spectrogram of a product prepared in Example 2, where the product is graphene-coated alumina.
| — |
Temperature | 200–300 °C | — |
Temperature | 200–250 °C | — |
Temperature | 1600–2000 °C | — |
thermally-oxidized polyacrylonitrile (OPAN)
alumina
Al₂O₃
dopant
FIG. 2 is a SEM pattern of a product prepared in Example 2, where the product is prepared at a calcination temperature of 900 0C; [0027]
FIG. 3 is an XRD pattern of a product prepared in Example 2, where the product is graphene-coated alumina; and [0028]
FIG. 4 is a Raman spectrogram of a product prepared in Example 2, where the product is graphene-coated alumina.
| — |
Temperature | 200–300 °C | — |
Temperature | 200–250 °C | — |
Temperature | 1600–2000 °C | — |
thermally-oxidized polyacrylonitrile (OPAN)
alumina
Al₂O₃
dopant
FIG. 2 is a SEM pattern of a product prepared in Example 2, where the product is prepared at a calcination temperature of 900 0C; [0027]
FIG. 3 is an XRD pattern of a product prepared in Example 2, where the product is graphene-coated alumina; and [0028]
FIG. 4 is a Raman spectrogram of a product prepared in Example 2, where the product is graphene-coated alumina.
| — |
Temperature | 200–300 °C | — |
Temperature | 200–250 °C | — |
Temperature | 1600–2000 °C | — |