Technical
Ceramics

AI2O3

B4C

AIN

BN

SiC

SI3N4

ZrO2

St-37

Material Properties

Main Content

alumina

boron carbide

aluminium nitride

boron nitride

silicon carbide

silicon nitride

zirconia

steel

Density

g/cm3

3,85

2,51

3,30

2,05

3,1

3,26

6,05

7,85

Porosity

Vol %

<0,2

<0,1

.

<5

0

<0,1

0

0

Mechanical Properties

Vickers
Hardness

HV 0,5

1800

3800

1100

.

2800

1450

1200

300

Modulus of
Elasticy

GPa

370

450

.

30 / 25

410

275

200

210

Flexural
Strength

4pt, MPa

300

400

300

70 / 30

410

750

1000

400

Compressive
Strength

MPa

2500

2800

.

.

2200

>2500

2000

± 300

Fracture
Toughness

MPa√m

.

3

.

.

3,2

7

12

140

Thermal Properties

Maximum Use
Temperature

Air, °C

1700

500

1000

800

1500

1100

1000

<<1000

Thermal
Expansion
20 - 100 °C

10-6 / K

.

4

4

2 / 7,5

4

3

10

12

Thermal
Conductivity

W / m.K

30

40

180

65 / 45

110

35

2,5

± 50

Electrical Properties

Electrical
Resistivity

Ohm.cm

>1014

0,1 - 2

1014

1012

10 - 100

1012

>108