Performance

Item

Index

Unit

Steatite ceramic

95 Al₂O₃

96 Al₂O₃

Physical Characteristics

Bulk density

g/cm³

2.7

3.6

3.6

Water absorption

%

0

0

0

Mechanical Characteristics

Flexural strength

Mpa

145

320

340

Hardness Vickers

Gpa

5.7

12.2

13.5

Elastic modulus

Gpa

120

280

320

Poisson’s ratio

-

0.21

0.22

0.23

Thermal Characteristics

Linear expansion coefficient

20-5000C 10-6/0C

7.9

7.1

7.2

Thermal conductivity

w/(m.k)

2.5

16

24

Specific Heat

*10-3J/(kg*K)

0.75

0.78

0.78

Electrical Characteristics

Dielectric constant(1MHZ)

-

6.2

9

9.4

Dielectric loss angle

*10-4

18

15

5

Dielectric strength

*106V/m

18

12

15