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Materials Properties Data Sheet



Property



Unit



Alumina

97.6 %
AL 300

 



Alumina

 99.5 %
AL 995

 

 


Aluminium

Nitride

 


Zirconia

 Mgo-PSZ

 


Zirconia

Y-TZP

 

Zirconia

Y-TZP

Biomedical

Grade

 

 

Silicon

Carbide

(sintered)

 

 

Silicon

Nitride

(sintered)

 

Glass

Ceramic

Macor ®

 

Quartz

Standard

Grade

Density     

g/cm³

3.76

3.86

3.32

5.65

6.05

6.09

> 3.10

> 3.24

2.52

2.2

Porosity

% water absorption

0

0

0

0

0

0

0

0

0

0

Flexural Strength

MPa

296

310

300

545

1000

555

(biaxial)

400

750

94

94

Compressive Strength

MPa

>1720

>2070

2000

1700

2000

2000

2200

> 2500

345

1150

Young’s modulus

GPa

> 330

> 370

310

205

205

209

410

310

67

70

Fracture toughness

MPa.m 1/2

-

-

-

6.0

10.0

-

3.2

7.0

-

-

Hardness

 -

HR 45N

75

HR 45N

81

-

HV 0.3

1120

HV 0.3

1300

14.6 GPa

HV 0.5

2600

HV 0.5

1450

-

-

Thermal Conductivity 

W/m K

26.8

29.3

170 – 190

2.5

2.4

-

110

22

1.46

1.38

Coef. Linear Thermal Expansion

10-6 / °C

9.0

25-1000°C

9.4

25-1000°C

5.6

25-1000°C

10.0

25-800°C

10.0

25-800°C

-

4.0

20-500 °C

2.5

20-500 °C

12.6

25-800°C

0.48

25-900°C

Max. Working Temperature (no load)

°C

1650

1725

-

1000

1000

-

1450

-

800

1150

Dielectric Strength

 Kv/mm 

43.3

31.5

20

-

-

-

-

 

40

40

Volume Resistivity    

W cm

> 10.14

> 10.14

5 x 10.12

10.10

10.9

-

> 10.3

10.12

> 10.16

10.16

Dielectric Constant (K')

-

9.53

@10 MHz

9.58

@10 MHz

8.6

@1 MHz

-

-

-

-

 

6.03

@1 KHz

3.7

@1 MHz

Dissipation Factor (tan d)

-

0.4 x 10-3

@10 MHz

0.3 x 10-3

@10 MHz

0.5 x 10-3

@1 MHz

-

-

-

-

 

4.7 x 10-3

@ 1 kHz

0,5 x 10-3

@ 1 kHz

Applications

 

Electrical insulation

Vacuum

Brazing

Mechanical

Electrical insulation

Vacuum

Brazing

Mechanical

Electrical insulation

 

Thermal dissipation

Mechanical

 

Thermal insulation

Mechanical

 

Thermal  insulation

 

Biomedical

 

Mechanical

Chemical corrosion

Thermal dissipation

Mechanical

 

Electrical Insulation

Electrical insulation

Thermal insulation

Electrical insulation

Thermal insulation

Please note that all values quoted are for information only and are based upon test pieces. These values may vary according to component design.
They should be used for guidance only. 
Microcertec do not guarantee that the materials offered will entirely meet these specifications.

More materials are available and data can be supplied upon request.