Method for producing thin graphite flakes with large aspect ratios
Abstract
A method for making graphite flakes of high aspect ratio by the steps of providing a strong concentrated acid and heating the graphite in the presence of the acid for a time and at a temperature effective to intercalate the acid in the graphite; heating the intercalated graphite at a rate and to a temperature effective to exfoliate the graphite in discrete layers; subjecting the graphite layers to ultrasonic energy, mechanical shear forces, or freezing in an amount effective to separate the layes into discrete flakes.
- Inventors:
-
- Kennewick, WA
- Issue Date:
- Research Org.:
- Battelle Memorial Institute, Columbus, OH (United States)
- OSTI Identifier:
- 868662
- Patent Number(s):
- 5186919
- Assignee:
- Battelle Memorial Institute (Richland, WA)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS
C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08K - Use of inorganic or non-macromolecular organic substances as compounding ingredients
- DOE Contract Number:
- AC06-76RL01830
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- method; producing; graphite; flakes; aspect; ratios; ratio; steps; providing; strong; concentrated; acid; heating; presence; time; temperature; effective; intercalate; intercalated; rate; exfoliate; discrete; layers; subjecting; ultrasonic; energy; mechanical; shear; forces; freezing; amount; separate; layes; shear forces; temperature effective; ultrasonic energy; aspect ratio; amount effective; aspect ratios; graphite flakes; discrete layer; concentrated acid; shear force; discrete layers; /423/
Citation Formats
Bunnell, L Roy. Method for producing thin graphite flakes with large aspect ratios. United States: N. p., 1993.
Web.
Bunnell, L Roy. Method for producing thin graphite flakes with large aspect ratios. United States.
Bunnell, L Roy. Fri .
"Method for producing thin graphite flakes with large aspect ratios". United States. https://www.osti.gov/servlets/purl/868662.
@article{osti_868662,
title = {Method for producing thin graphite flakes with large aspect ratios},
author = {Bunnell, L Roy},
abstractNote = {A method for making graphite flakes of high aspect ratio by the steps of providing a strong concentrated acid and heating the graphite in the presence of the acid for a time and at a temperature effective to intercalate the acid in the graphite; heating the intercalated graphite at a rate and to a temperature effective to exfoliate the graphite in discrete layers; subjecting the graphite layers to ultrasonic energy, mechanical shear forces, or freezing in an amount effective to separate the layes into discrete flakes.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {1}
}
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