Item

Test Condition

Unit&Symbol

Cordierite ceramics

The main chemical ingredient

2MgO 2Al2O3 5SiO2

Bulk Density

gm/cc

2.5

Maximum Use Temperature

1000℃

Water absorption

%

0

Hardness

HV

800

Bending Strength

20° C

Kgf/cm2

900

Compressive Strength

20° C

Kgf/cm2

3500

Fracture Toughness

K(I c)

Map.m3/2

-

Coefficient of 

thermal expansion

1X 10-6/°C

≤2.0

Coefficient of 

thermal conductivity

25° C-30° C

W/m °K

1.3-

Thermal Shock Resistance

∆ Tc

°C

250

Dielectric constant

1MHz.25℃

6

Dielectric strength

ac-kV/mm (ac V/mil)

10

Volume Resistivity

20℃

ohm-cm

> 1012