Alumina 99.8%

Alumina ceramics is a ceramic material with Al2O3 as the main crystal phase. SENCERAMCS can produce ceramic products with an alumina content of 96% to 99.8%. The alumina has a compact structure, low activity, and high-temperature stability. The electrical properties are the best, with good mechanical properties, with a Mohs hardness of 9. Alumina 99.8% ceramics have high mechanical strength, high volume resistivity, good electrical insulation properties, high lightness, and wear resistance. A series of anti-oxidation properties are widely used in structural parts and functional device ceramic parts, such as wear-resistant and corrosion-resistant parts used in the mechanical and chemical fields; crucibles, protective tubes, refractory materials used in the metallurgical industry; substrates, insulators, Porcelain parts for the electronics industry, such as radomes, microwave electrolytes, etc.

99.8% Alumina Parameters

Composite(wt %)99.8%
Color Ivory
Densityg/cm33.92
HardnessHRA85
Flexural StrengthMpa(psi*103 )381
Gas Permeability0
Water Absorption%0
Thermal Shock Resistance°C198
Thermal Expansion×10-6/℃8.2
Dielectric Constant,20°C1MHz9.7
Dielectric loss, tanδ1MHz1×1014
Volume Resistivity,20℃Ω·cm≥1014
Dielectric Strength,DCΩ·cm20
Compressive StrengthKV/mm2600
Fracture ToughnessMPa( psi * 103)350
Poisson’s RatioMPa0.22
Thermal conductivityW/mK27
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