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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

ThermalFill 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

ThermalFill 8

Ground , crushed  and roundish alumina
Mono-modal
D50 = 8µm​
SSA = 0.5m²/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
D50 = 80 µm
Top cut = 200 µm

ThermaFill+ 100

Ground , crushed  and roundish alumina
D50 = 100 µm
Top cut = 300 µm

ThermaFill+ 130

Ground , crushed  and roundish alumina
D50 = 130 µm
Top cut = 300 µm