Material in accordance with EC 672/DIN VDE 0335 (Formerly DIN 40685)

Porcelain

Steatite

Open Porosity (water Absorption)

Vol.%

0

0

Bulk Density

g/cm²

2.45

2.7

Compressive Strength

N/mm²

450

900

Pezura Strength

N/mm²

40

140

Modules of Elasticity

N/mm²

1.0x10²

Coefficient of near thermal expansion 20’ - 800'C.

10²/K

4-6.5

7.9x10²

Specific Heat capacity 20’ - 100'C.

J/Kg.K

800-900

Thermal Conductivity 20' - 100'C.

W/mK

1.2-2.6

2-3

Resistance to Thermal shock

K

150-170

100

Hardness (Mohs Scale)

Mohs

7

8

Dielectric Constant

6

6

Withstand Voltage

KV

>20

>30

Dissipation (loss) Factor Max at 48-62 Hz

1.5

Volume Hesistivity at 20'C.

cm

10¹²

10²

Surface Hesistivity Min

10¹⁰