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Materials

Properties

Our oxide ceramic products have distinct advantages in their safety in operation, reliability and long operational life.  Additionally, their properties include extreme hardness and wear resistance, high compressive and bending strength even at high temperatures, high resistance to thermal shock, good thermal conductivity, high dielectric strength, high electrical volume and surface resistivity, low dielectric loss at high frequencies and low cross-section neutron absorption when used in nuclear technology.

Material

Al2O3 Alumina

FRIATEC Trade name

F99.7

DD57

AL23

AL24

AL25

FZT

Properties of Microstructure

Apparent Density

g/cm3

3.903.95

3.703.80

3.703.95

3.403.60

2.803.10

4.054.15

Open Porosity

%

0

0

0

0 - 5

20 - 30

0

Mean Grain Size

μm

10

10

10

40

70

5

Mechanical Properties 20C

Hardness (Knoop, 100g)

N/mm2 (MPa)

23 000

23 000

23 000

-

-

20 000

Compressive Strength

N/mm2 (MPa)

3 500

3 000

3 500

1 000

300

3 000

Bending Strength

N/mm2 (MPa)

350

300

300

150

70

460

Modulus of Elasticity

GPa

380

380

380

-

-

360

Thermal Properties

Maximum Operating Temperature

C

1 950

1 950

1 950

1 950

1 950

1 700

Specific Heat 20C

J/kgK

850

900

850

-

-

850

Thermal Conductivity 100C

W/mK

30

30

30

-

-

25

Expansion Coefficient  201000C

10-6/K

8.5

8.5

8.5

8.5

8.5

8.6

Electrical Properties

Specific Resistance 20C

W cm

1015

1014

1014

-

-

-

Specific Resistance 500C

W cm

1011

1010

1010

-

-

-

Specific Resistance 1 000C

W cm

107

107

107

-

-

-

 

Material

ZrO2 Zirconia

Non-oxides

FRIATEC Trade name

FZM

FZY

FZM/K

SiC 198

SiC 198D

HP 79

Properties of Microstructure

Apparent Density

g/cm3

5.705.80

5.505.80

6.006.10

3.1

3.15

3.25

Open Porosity

%

0

0

0

< 1

< 1

< 1

Mean Grain Size

μm

50

50

0.5

-

10

10

Mechanical Properties 20C 

Hardness (Knoop 100g)

N/mm2 (MPa)

16 000

17 000

18 000

-

26 000

16 000

Compressive Strength

N/mm2 (MPa)

2 000

2 000

2 200

1 000

2 500

3 000

Bending Strength

N/mm2 (MPa)

500

400

800

300

400

850

Modulus of Elasticity

GPa

185

200

200

330

400

320

Thermal Properties

Maximum Operating Temperature

C

900

1 500

1 200

1 400

16501900

1 200

Specific Heat 20C

J/kgK

400

400

400

900

1 000

800

Thermal Conductivity 100C

W/mK

2.5

2.5

2.5

130

100

30

Expansion Coefficient  201000C

10-6/K

11.1

11.2

10.8

4.4

4.5

3.2

Electrical Properties

Specific Resistance 20C

Ω cm

1010

1010

1010

0.2

10-1

1010

Specific Resistance 500C

Ω cm

104

5 x 103

102

-

-

-

Specific Resistance 1000C

Ω cm

25

15

-

0.005

-

107

The data indicated in this table is in line with the introductory German Industrial Standard DIN 40685 and relates to the specimens from which it was obtained and is not unconditionally applicable to other forms of the same material. The data must, therefore, be regarded as indicative only.

 

Because of these properties there are many applications where FRIALIT-DEGUSSIT products can be used.

 

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Last modified:
Friday, 06 July 2012