STOCKMEIER Holding GmbH, Bielefeld
Am Stadtholz 37
33609 Bielefeld

+49 521 / 3037-0
+49 521 / 3037-159

info@stockmeier.de

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Ceramics

Reactive alumina, calcinated clay and unground alumina for high-performance ceramic products

High-temperature Applications
  • Ceramics

What do we offer?

Raw materials for ceramics

The outstanding mechanical, thermal, electric and chemical properties, as well as the excellent price-performance ratio of aluminum oxide, make calcined and reactive alumina one of the most important raw materials in industrial and high-performance ceramics. The extreme strength and abrasion resistance of corundum are key properties in wear-resistant ceramics.

Benefits to you

  • Products with outstanding mechanical, thermal, electric and chemical properties
  • Excellent price-performance ratio
  • Extreme strength and abrasion resistance
  • High purity, finely crystalline alumina

Properties & Applications

Properties

High purity, finely crystalline alumina with a sodium oxide content of max. 0.1% are of particular importance in technical high-performance ceramics.

In refractory ceramics, corrosion resistance, thermal conductivity and heat resistance are vital properties of aluminum oxide (melting point > 2000 °C).

Thanks to its electrically insulating properties, aluminum oxide remains an important raw material in the field of insulating ceramics.

Applications

Many electronic components use aluminum oxide: its thermal conductivity, as well as its resistance to changes in temperature, make the product an indispensable material in the automotive industry, to name just one example.

In industrial ceramics, reactive alumina are used to achieve certain properties through the formation of minerals containing aluminum oxide, such as cordierite or mullite. The addition of aluminum oxide to frits and glazes, for example, helps increase surface strength, abrasion resistance and chemical resistance.

Products

Product

ProductAl₂O₃-Content in %Special SurfaceGreen Density / 90 MpaDensitySchrinkageGrain Distribution
  in %BETin g/cm³at 1600°C/1h in g/cm³in %  
ALUMINA CL370 99,73,02,603,40   bimodal
ALUMINA CT3000 SDP (Ready-to-press powder)99,77,02,313,9116,6 at 1600°C  
ALUMINA CT1200 SG99,83,12,383,86 at 1670°C/1h    
ALUMINA CT3000 SG99,87,52,233,88 at 1540°C/1h17,1 at 1540°C  
ALUMINA CT530 SG99,84,92,55 at 50 KN3,86 at 1670°C/1h12  
ALUMINA CTC 2099,72,12,403,20   monomodal
ALUMINA CTC 3099,83,82,553,45   multimodal
ALUMINA CTC 4099,84,82,363,60   bimodal
ALUMINA CTC 5099,84,12,603,60   multimodal
ALUMINA RG 400099,87,22,183,83   monomodal

These values are typical data!

Calcinated clay

ProductsAl₂O₃-Content
ALUMINA CL3000 FG99,8
ALUMINA CL3000 SG99,8
ALUMINA CL4400 FG99,8
ALUMINA CT19 FG99,8
ALUMINA CT800 FG99,7
ALUMINA CT800 SG99,7
ALUMINA CT800 SG99,7
ALUMINA CT9 FG99,5
ALUMINA HVA FG99,7
ALUMINA WRA FG99,7
ALUMINA Gilox 6399,0
ALUMINA Gilox 12599,0

Unground Alumina

ProductAl₂O₃-ContentComment
ALUMINA CL250099,8low Na₂O-Content (< 0,1%)
ALUMINA CL300099,8low Na₂O-Content (< 0,1%)
ALUMINA CL440099,8low Na₂O-Content (< 0,1%)
ALUMINA CT1999,6  
ALUMINA CT120099,8  
ALUMINA CTGA99,0particularly high surface, 50-80 m²/g BET
ALUMINA HVA99,7  
ALUMINA WRA99,7  

Service & Support

Contact

BASSERMANN minerals

Angelika Metz
Department Manager Ceramics + Refractories

+49 621 / 1501-116
a.metz@bassermann.de