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Functional Fillers

Functional Fillers

Filler materials are used to enhance or improve the properties of a given product.  Alumina is used as filler material for a wide  variety of applications due to it’s advantageous physical and chemical properties.  The alpha-phase of alumina has superior mechanical, thermal and electrical properties as compared to most other oxide materials and is one of the most inert oxides available.

Many common filler applications include thermal management solutions for electronics, wear protection in coatings and lacquers, pigments and modifiers in paper and glazes, and strength improvement in composites.

Almatis offers ground calcined and tabular alumina products for filler applications.  Specific focus on particle size consistency and control of the coarse tail of the distribution differentiate our products and improve their performance.

Our low-soda and ultra-low soda tabular aluminas combine the properties of our standard aluminas  with a low alkali content.  The extremely low total Na2O content results in even lower solubility of free Na+, minimizing potential undesired chemical interactions between the alumina filler and matrix components.

Unground Calcined Aluminas

A 3500

Primary Crystal Size = 2.7µm
Specific Surface Area = 0.50 m2/g
Na2O Content = 0.08%

P 25

Primary Crystal Size = 22µm
Specific Surface Area = 0.15 m2/g
Na2O Content = 0.35%

A 10

Primary Crystal Size = 4.8µm
Specific Surface Area = 0.20 m2/g
Na2O Content = 0.08%

Continuous Ground Calcined Aluminas

Gilox 63

Ground Median Size = 17µm
Ground Surface Area = 0.20 m²/g
Na2O Content = 0.35%

A 10-325

Ground Median Size = 8.0µm
Ground Surface Area = 0.50 m²/g
Na2O Content = 0.08%

CT 19 FG

Ground Median Size = 5.5µm
Ground Surface Area = 0.60 m²/g
Na2O Content = 0.08%

A 14-325

Ground Median Size = 3.2µm
Ground Surface Area = 0.80 m²/g
Na2O Content = 0.03%

CL 3000 FG

Ground Median Size = 4.2µm
Ground Surface Area = 0.90 m²/g
Na2O Content = 0.06%

A 2-325 CR

Ground Median Size = 5.0µm
Ground Surface Area = 0.70 m²/g
Na2O Content = 0.30%

A 35-325 CR

Ground Median Size = 4.5µm
Ground Surface Area = 0.70 m²/g
Na2O Content = 0.11%

HVA FG

Ground Median Size = 4.8µm
Ground Surface Area = 0.70 m²/g
Na2O Content = 0.12%

CT 800 SG

Ground Median Size = 3.4µm
Ground Surface Area = 1.0 m²/g
Na2O Content = 0.12%

Batch Ground Calcined Aluminas

A 3000 FL C

Ground Median Size = 2.7µm
Ground Surface Area = 2.5 m²/g
Na2O Content = 0.07%

A 16 SG

Ground Median Size = 0.4µm
Ground Surface Area = 8.8 m²/g
Na2O Content = 0.07%

CT 3000 SG

Ground Median Size = 0.4µm
Ground Surface Area = 7.5 m²/g
Na2O Content = 0.08%

A 1000 SG

Ground Median Size = 0.6µm
Ground Surface Area = 8.2 m²/g
Na2O Content = 0.07%

A 152 SG

Ground Median Size = 1.2µm
Ground Surface Area = 4.3 m²/g
Na2O Content = 0.06%

A 3000 FL

Ground Median Size = 2.7µm
Ground Surface Area = 2.5 m²/g
Na2O Content = 0.07%

A 3500 SG

Ground Median Size = 2.3µm
Ground Surface Area = 1.6 m²/g
Na2O Content = 0.07%

Selected Tabular Aluminas

T 60/64 20 μm

Ground Median Size = 2.7µm
Ground Surface Area = 2.5 m²/g
Na2O Content = 0.30%

T 60/64 -325 LI

Ground Median Size = 9.5µm
Ground Surface Area = 0.90 m²/g
Na2O Content = 0.30%

T 64 -325 SP

Ground Median Size = 9.0µm
Ground Surface Area = 1.0 m²/g
Na2O Content = 0.11%

T 64 -325 XLS

Ground Median Size = 9.0µm
Ground Surface Area = 1.0 m²/g
Na2O Content = 0.03%

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