Method for producing graphite powder with an increased bulk density
AssigneeTimcal Ltd.
InventorsMichael Spahr, Davide Cattaneo, Klaus Streb
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Abstract
A method for increasing the Scott density of synthetic and/or natural graphite powders of any particle size distribution, preferably of highly-pure graphite, by subjecting the graphite powder to an autogenous surface treatment. The powder is used, in particular, for producing dispersions, coatings with an increased graphite/binder ratio and increased electric and thermal conductivity, gas and liquid-tight coatings on metal substrates, thermoplastic or duroplastic graphite-polymer composites, or for producing metallic, non-ferrous sintering materials.
Claims40
A process for increasing the Scott density of a starting graphite powder of any particle size distribution, the starting graphite powder being a synthetic and/or natural graphitic carbon which has a high graphite content in the particle, comprising subjecting the starting graphite powder to an autogenous surface treatment in which individual graphite powder particles are allowed to impact with one another at a measured speed so that their surface structure changes while substantially retaining graphite particle shape without a substantial grinding effect occurring and wherein said autogenous surface treatment is carried out until the Scott density and/or the tamped density of the starting powder has increased by at least about 10% to about 100%.
Dependencies are inferred from the claim text.