Alumina ≥ 95%

Hardness HV5 ≥1050

Density g/cm3 ≥3.6

Bending Strength >=3200 Kgf/cm2
(room temperature)

Pressure resistance>=13500 Kgf/cm2
(room temperature)

Fracture Toughness >=4 MPa*m^1/2

Water Absorption: 0

Color: White

Highness <= +/-0.03

Levelness <=0.02

Levelness of Machined Surface <0.6μm(aperture<2)

Surface roughness(Ra) <=0.3μm

Surface contact area ratio 60<=ta<=80 ta(optically measured)