Silicides Ceramics Perts

Properties

Conditions

Units of measurement

Silicides

Steatite

Cordierite

Mullite

Colour

Серый

Бежевый

Серый

Volumetric density

г/см3

≥2,70

≥2

≥2,8

Water absorption

—

%

0

≤1

10~15

Flexural strength

МПа

≥190

＞60

170

Compressive strength

МПа

≥551

＞280

550

Modulus of elasticity

ГПа

Poisson 's Ratio

Vickers Hardness

HV5

ГПа

800

＞800

750

Fracture toughness

МПа∙м1/2

2

Coefficient of thermal expansion

20-800 °C

10-6 /°C

7,7~8,0

1,1-1,8

5,3

Thermal conductivity

—

Вт/м∙K

2,5

3,35~5,02

3,5

Heat shock resistance

ΔT

°C

≥200

＞260

300

Maximum operating temperature

°C

1290

1350

1450

Dielectric constant

1 МГц

—

5,8

6

6

Dielectric losses

1 МГц

∙10-4

Dielectric strength

DC

кВ/мм

18

10

8

Volumetric resistance

25 °C

Ом∙см

≥ 1013

≥ 1013

≥ 1014

Thick film

нет

Thin film

да