In so-called contact materials, metal powder is used to achieve electrical or thermal conductivity. Typical applications include the carbon brushes in electric motors, where lamellar copper powder is used in combination with graphite powders.
Lamellar copper powders for use in contact materials, lubricants and in the chemical industry are produced when copper powder atomized in air is processed in the following ball milling procedures.
|Apparent density [g/cm³]||Copper content [%]||D 50 value [µm]||flowability||Grease content [%]||Sieve analysis [%]||Application|
|approx. 1||min. 98||approx. 38||not flowable||max. 0.3||>45µm: max.6||
|approx. 1||min. 98||approx. 34||not flowable||max. 0.2||>45µm: max.5||
|approx. 0.7||min. 95||approx. 14||not flowable||approx. 1.4||>75µm:traces >45µm: max.3||
|approx. 0.8||min. 96||approx. 20||not flowable||approx. 0.6||>45µm: max.1 >75µm:traces||
|approx. 0.8||min. 95||approx. 4||not flowable||approx. 0.5||>45µm:traces||
Rogal Copper GK
Smelting and atomization are used to produce copper powders from highly pure refined or electrolytic copper.
In the air atomization process used by SCHLENK, spherical particles are formed , which are then classified into the required particle size distribution.
|Apparent density [g/cm³]||Copper content [%]||flowability||Phosphorus content [%]||Sieve analysis [%]||Application|
|approx. 5||min. 99||flowable||max. 0.4||> 50 µm: max. 5||
|ca. 5||min. 99||fließfähig||max. 0.4||> 63 µm: max. 5||
|approx. 5||min. 99||flowable||max. 0.4||>100µm: max. 5 < 50µm: max.10||
|approx. 5||min. 99||flowable||max. 0.4||>250µm: max. 5||
|approx. 5 g/cm³||min. 99||flowable||max. 0.4||>315µm: max. 5||
Brass is an alloy made of copper and zinc in various compositions.
Air atomization of the molten material results in irregularly shaped powders. Common compositions are brass I (approx. 92%Cu/8%Zn), brass II (approx. 82%Cu/18% Zn) and brass III (approx. 70%Cu/30%Zn)
|Apparent density [g/cm³]||Copper content [%]||flowability||Sieve analysis [%]||Zinc content [%]||Application|
|approx. 3||approx. 92||flowable||> 63 µm: max. 5||approx. 8||
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