Aluminum Oxide/Al2O3

      Alumina, also known as bauxite (Al2O3), is a high-temperature-resistant, high-hardness, high-strength technical ceramic material with excellent insulation, corrosion resistance and wear resistance.

Physical properties
Specific gravity (S.G): 3.95-3.98 g/cm3
Porosity: <0.1%
Vickers hardness (HV1 Hardness): 1600-2000 HV
Flexural Strength: 330-550 MPa
 Compressive Strength: 2500-4000 MPa Young's Modulus: 380-410 GPa
 Fracture Toughness: 3.5-4.5 MPa√m

Thermal properties
Linear thermal expansion coefficient (40~400°C): 8-9 × 10^-6/°C
Linear thermal expansion coefficient (40~800°C): 8.4-9 × 10^-6/°C
Thermal Conductivity: 25-35 W/m·K
Specific Heat: 775-880 J/kg·K

Electrical properties
Dielectric Strength/Resistance: 10-16 kV/mmVolume resistivity (20°C): >10^14 Ω·cm
Volume resistivity (500°C): >10^10 Ω·cm
Dielectric constant (1MHz): 9-10
Dielectric loss angle (1MHz): <10^-4

In general, alumina has excellent properties such as heat resistance, electrical insulation, hardness and strength, and is widely used in structures, machinery, electronics, energy and other fields.