Steatite and cordieritte ceramics

Material

STEATIT

CORDIERIT

Qualification based on  ČSN EN 60672

C 221

C 410

Trade description

FR 59/8

TH 7/7 R12 BM

Symbol

Units

Open porosity

p_a

[%]

0

0.5

Bulk density

ρ_a

[g.cm^-3]

2.7

2.1

Modulus of elasticity

E

[GPa]

110

-

Flexural strength

σ

[MPa]

140

60

Mean coefficient of linear thermal expansion

α_30-600

[10^-6 K^-1]

7-9

2-4

Thermal conductivity

λ_30-100

[Wm^-1K^-1]

2-3

1.2-2.5

Resistance to thermal shock

ΔT

[K]

100

250

Relative permittivity

ε_r

-

6

5

Volume resistivity in terms of temperature

ρ_v,30

[Ω.m]

10¹¹

10¹⁰

ρ_v,200

[Ω.m]

10⁹

10⁶

Colour

beige

grey