White fused alumina is an industrial product. It is melted of high quality white fused alumina in an electric arc. White fused alumina consists of about 99 % α-aluminium oxide. The outstanding property of white fused alumina is a high hardness and transparency. Only diamonds are tougher. This high hardness is a challenge for every grinding technology. Our micronized white fused alumina flours SEPASIL® are characterized by a narrow grain size distribution. Another refining step is the surface-treatment with silanes or silane-based substances which can be adjusted to the respective application.
depending on processing: the grain shape is round or splintered
high hardness of 9 (Mohs)
density of 3.95 g/cm³
chemically inert
high chemical resistance
narrow grain size distribution
transparent performance in many binding systems
abrasion-resistant wood and decorative coatings
laminates
casting resin systems and high voltage isolators
SEPASIL® EK