PRODUCT
HIGH-DENSITY ALUMINA MICROSPHERES
FOR MICRONIZATION AND DRY GRINDING XIETA®

Xieta International, S.L. has developed its high-density alumina microspheres to meet market demands, allowing particle sizes of extreme fineness to be achieved at the end of the grinding process.
Our microspheres are characterized by high density and wear resistance, making them ideal for use in energy-intensive grinding, including dry grinding or vertical mill grinding.
They are used in various sectors such as ceramics, paint, inks, pigments, and cosmetics, in applications that require a high level of micronization.
Key Benefits:
Very high hardness and mechanical strength
Excellent wear resistance
Total corrosion resistance
Very high resistance to chemical attack
Smoother, more regular, and uniform surface
GENERAL PROPERTIES
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Main Raw Material Calcined Alumina
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Alumina Content ≥ 92%
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Density (g/cm³) 3.67 ± 0.05
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Color White
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Mohs Hardness 9-10
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Vickers Hardness (0.5 kg) 1250 ± 50
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Flexural Strength (MPa) 170 ± 30
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Compressive Strength (MPa) 2350 ± 50
CHEMICAL COMPOSITION
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Al2O3 (%) ≥ 92
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SiO2 (%) ≥ 5.62
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CaO (%) ≤ 1.48
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Na2O (%) < 0.1
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Otros (%) ≥ 0.8
AVAILABLE SIZES
Microspheres | Diameter (mm) |
---|---|
XT92-3 | 3-5 mm |
XT92-5 | 5-7 mm |
XT92-7 | 7-9 mm |
XT92-9 | 9-11 mm |
XT92-12 | 12 mm |
XT92-14 | 14 mm |
XT92-16 | 16 mm |
XT92-18 | 18 mm |