As a commercial partner of innovative Hungarian startup companies, we deal with the trade of special quality metal powders, which are now indispensable in 'high-tech' industries. There are two large categories of high-value, ultra fine metal powders, namely the group of metal powders belonging to the micro-size range and the nano-size range. Micro-powders are mainly used by additive technologies as a raw material for 3D printing, while the much more expensive, high-purity nano-powders for special uses, are considered a strategic product.
Additive technologies based on 3D printing enable the production of a wide variety of complex metal parts. Their raw material is a suspension whose solid phase is micro or nano metal powder, and whose liquid phase is a plastic binder.
For the production of raw materials for additive technologies, we offer a wide selection of metal powders, the particle size of which varies between 0.5 and 25 and 25 and 175 micrometers, with a globulitic or dendritic grain structure. We primarily sell tin bronzes, brass varieties, red alloys and aluminum bronzes, as well as casting zinc alloys, but in case of sufficient quantities, we also undertake the delivery of special non-ferrous metal alloys.
Tin bronze: CuSn8, CuSn10 and CuSn12, as well as CuSn12Ni and CuSn8P
Brass alloys: CuZn37, CuZn39, CuZn40, CuZn42 (lead free), as well as CuZn35Ni2, CuZn35Ni3Mn2AlPb, CuZn40Ni10, CuZn38Sn1 ('Naval Brass'), CuZn25Al5, CuZn34Al2, CuZn35Al1, CuZn37Al1, CuZn40Al2, CuZn25Al5Mn4Fe3, CuZn34Mn3Al2Fe1, CuZn35Mn2Al1Fe1, CuZn40Mn2 and CuZn40Mn2Fe1, as well as CuZn21Si3P ('Eco brass')
Red alloys: CuSn9Zn5, CuSn10Zn, CuSn7Zn3Ni2PS
Aluminum bronze: CuAl10Mn1, CuAl10Ni3Fe2, CuAl10Ni5Fe5, CuAl11Ni6Fe6, CuAl9Fe3, CuAl10Fe2, CuAl10Fe3Mn2
'Nordic gold': CuZn5Al5Sn1
Zink alloys: ZnAl4, ZnAl4Cu1, ZnAl8Cu1, ZnAl12Cu1, ZnAl27Cu2
The typical particle size of the ultra fine copper powders we sell is in the nano size range, and another important feature is that their chemical purity exceeds 99.9997%. This purity can be ensured by multiple electrolysis, "boiling" in the plasma state, or zone melting.
Ultra fine copper powders have special physicochemical properties that are completely different from copper in its larger grain size state. These characteristics are mainly based on the extremely high surface charge:
Due to their extremely high unit price, ultra fine copper powders are sometimes used as banking products in addition to technical applications.
The unit price of this special product is strongly influenced by the chemical purity and grain size, as well as the distribution of the grains, which depend on the production technology.
Taking into account the EU directives on circular material management, secondary materials mainly from e-scrap recycling are used as raw materials for the production of ultra fine copper powder.
After careful selection and preparation, these materials are melted and then cast in a pyrometallurgical process. This is followed by refinement of the cast ingots by electrolysis, or by further pyrometallurgical processes such as zone melting.
The powder is produced by melting the previously refined metal to a high purity in an induction furnace with shielding gas, then atomizing it in a closed space with a water jet or a high-pressure shielding gas through a nozzle. If atomization is done with a water jet, dendritic particles are formed, and if with a shielding gas, globular particles are formed. In the latter case, the development of the particles into a regular spherical shape can be improved during the process by ultrasonic treatment.
In industrial quantities, ultra fine copper powders were previously produced only in the USA, Russia, Japan and South Korea, but now several European startup companies have developed a production technology that enables the nano-size range to be reached, but the expected chemical purity above 99,9995%, the so-called '5N5', can only still be achieved by very few producers.
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