Aluminium Powder | minerex.ch

Aluminium Powders

The high quality aluminium powder marketed by Minerex AG is produced in the modern manufacturing plants in Russia. Its total combined production volume is 19'000metric tones, covering powders for various industrial applications, pigments and pyrotechnic aluminium dust.
Dry aluminium powder is produced by atomizing liquid aluminium with heated nitrogen, then separated into various particle size fractions using vibration screens and rotary centrifugal classifiers. Following ball milling, dry powders may be converted to flaky powder with greater flat surface area. Various organic additives may be added to control properties such as hydrophilic property, as well as for the paste production.

Application
Minerex AG is focused marketing Al powders in two specific area of application:
- Autocalved Aerated Concrete (AAC, Gasbeton)
- Solar Paste (Metallization paste for solar cells)
- Pigment
- Pyrotechnical
- Alumino-thermic reaction and other metallurgical application

Autocalved Aerated Concrete (AAC, Gasbeton)
AAC is a lightweight concrete used in the construction industry as structural building material providing excellent insulation, and fire/mold resistance property as well as easy handling nature. AAC products may come in forms of blocks and panels for wall, floor, and roof. Its physical property differs from regular concrete by its porous nature created by hydrogen gas evolution during the production process (as a result of aluminium powder reacting with other casting mix components such as calcium hydroxide). This pours nature determines the quality of AAC blocks, therefore hydrogen gas evolution curve is one of key elements in selecting the required grade by the customer.

We offer to our customer three different types of aluminum powder based products for AAC production.
- Aluminium flaky powder PAP
- Aluminium flaky powder with increased hydrophilic property HAP
- Aluminium paste APH

Aluminium flaky powder PAP

PAP is produced by atomizing in nitrogen environment followed by ball milling. Shape of particles is lamellar.

Property of PAP

Aluminium flaky powder HAP
HAP is produced by atomizing in nitrogen environment followed by ball milling. Special additives are added in order to increase its wettability. Shape of particles is lamellar.

Property of HAP

Gas evolution at 25 degree C (0.07g of Al pigment in 2.5% Ca(OH)2 solution*)

Aluminium paste APH

APH is produced by atomizing in nitrogen environment followed by ball milling. Solvent diethyleneglycol is added to make paste. Shape of particles is lamellar.

Gas evolution at 25 degree C (0.07g of Al pigment in 2.5% Ca(OH)2 solution*)

Solar Paste (Metallization paste for solar cells)

A solar cell is a device designed to produce electricity from light through photovoltaic effect, in which light energy from the Sun is captured and converted into electricity. We offer spherical aluminimum powder ASP grade for the production of electroconductive paste, which is to be applied for the metallization of such solar cells.

Our ASP aluminium powders are produced by atomizing liquid aluminium in nitrogen environment having spherical particle shape and designed to fulfill specific needs for the metallization process, namely excellent electroconductive property and less bowing of the wafer after paste application. For the solar paste production we offer following three grades of spherical powders:
- ASP3 D50 3 microns
- ASP4 D50 4 microns
- ASP5 D50 5 microns
- ASP6 D50 6 microns

Sem Picture ASP-3

Particle size distribution ASP-3

Sem picture ASP-6

Particle size distribution ASP-6

Pigment

For the paint and varnish industry, Aluminium flaky powder PAP is recommended. PAP is produced by atomizing in nitrogen environment followed by drying milling in ball-mills. Shape of particles is lamellar.

Property of PAP

Pyrotechnical

For the pyrotechnical application, Aluminium flaky powder PP is recommended. PP is produced by atomizing in nitrogen environment followed by drying milling in ball-mills. Shape of particles is lamellar.

Property of PP

Alumino-thermic reaction and other metallurgical application

For the application of alumino-thermic welding, ferrous metallurgy (as deoxidizer), production of metallic chromium, manganese, molybdenum, vanadium and other metals by aluminothermic reducing, electrode industry as well as explosives, non-spherical aluminium powder is recommended.

Non-spherical aluminium powder PA is produced by atomizing liquid aluminium in nitrogen environment. The shape of particle is irregular, non-spherical, and drop-shaped.

Grain size of PA