Alumina Disc

Alumina Disc

Alumina Disc specifications

Alumina Disc specifications 

Al2O3      [%]

˜99.8

MgO       [%]

˜0.1

Na2O       [%]

˜0.04

SiO2       [%]

˜0.06

Fe2O3      [%]

=0.01

specific gravity (g/cm3)

3.93

Vickers hardness(HV)

2000

compressive strength(Mpa)

3900

Bending strength(Mpa)

390

Coefficient of thermal expansion(10-6K-1)

5.5~8.4

dielectric strength(Ocm)

30

polishing (µm)

Ra<0.1

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