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ALUMINUM OXIDE STD-A25

Product Benefits

STD-A25 portfolio offers a wide range of refractory agglomerated super-calcined (RASC) bauxite, which has been calcined at 1650 °C to a high-density aluminum oxide. The main constituent is the mineral corundum.

Quality assurance: Standardized quality guaranteed through ISO 9001 certified quality management.

Process control: Raw materials and production are closely monitored to ensure consistent chemical composition and grain size.

Applications: Used as a raw material for welding fluxes, in refractories, and in slip- and wear-resistant floorings.

Granulometric Data & Physical Characteristics

Mean values.These do not represent a specification.

PropertyValue (A25)UnitMethod
+25 micron 3.0 % Alpine air jet
D50 8.5 μm Laser diffraction
D97 30 μm Laser diffraction
Moisture 0.1 % Halogen moisture analyser @ 105 °C
Oil absorption 13 g/100 g ISO 787/5
pH 7.9 / ISO 787/9
Density 3.8 g/cm³ He-pyknometer
Loose apparent density 0.3 g/cm³ ISO 787/11

Chemical Analysis (XRF)

Mean values.These do not represent a specification.

ParameterResultDimensionMethod
Al₂O₃ 88.8 %(m/m) XRF
SiO₂ 6.0 %(m/m) XRF
Fe₂O₃ 1.8 %(m/m) XRF
TiO 3.4 %(m/m) XRF
Na₂O 0.0 %(m/m) XRF
K₂O 0.2 %(m/m) XRF
MgO 0.0 %(m/m) XRF
CaO 0.0 %(m/m) XRF
P₂O₅ 0.07 %(m/m) XRF
LOI 0 %(m/m) 1000 °C, 1 hour

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