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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.

ThermaFill-Series

ThermaFill 1

Ground, crushed  and roundish alumina
Mono-modal
D50 = 0.5µm​
SSA = 7​m²/g

ThermaFill 2

Ground, crushed  and roundish alumina
Mono-modal​
D50 = 1.2​µm​
SSA = 3​m²/g

ThermaFill 3

Ground, crushed  and roundish alumina
Bi-modal​
D50 = 3​µm​
SSA = 3​m²/g

ThermaFill 4

Ground, crushed  and roundish alumina
Mono-modal
D50 = 3​µm​
SSA = 2​m²/g

ThermaFill 5

Ground, crushed  and roundish alumina
Mono-modal
D50 = 4​µm
SSA = 0.9m²/g

ThermaFill 8

Ground, crushed  and roundish alumina
Mono-modal
D50 = 8µm​
SSA = 0.5m²/g

ThermaFill 9

Ground, crushed and roundish alumina
Mono-modal
D50 = 9 µm​
SSA = 0.8​m²/g

ThermaFill 10

Ground, crushed  and roundish alumina
Mono-modal
D50 = 10​µm​
SSA = 0.8​m²/g

ThermaFill 15

Ground, crushed  and roundish alumina
Mono-modal​
D50 = 15​µm​
SSA = 0.4​m²/g

ThermaFill+ 80

Ground, crushed  and roundish alumina
Mono-modal
D50 = 75 µm
SSA = 0.25m²/g

Wet Ground Aluminas

ULTIMATE S3000

Particle Size / D50 Cilas = 0.2µm
Specific Surface area/BET = 10m²/g
MOl 20-105°C = 35%
Na2O Content = 0.13%