Silicon nitride ceramics, silicon nitride materials, nitride ceramics, silicon nitride ceramic balls, high-thermal-conductivity aluminum nitride ceramic substrates, high-thermal-conductivity silicon nitride ceramic substrates, aluminum nitride powder materials

Common material performance comparison table

Mechanical behavior

Unit

Al2O3

SiC

Si3N4

ZrO2

GCr15

9Cr18

Density

g/cm3

3.95

3.15

3.20

6.00

7.8

7.9

Colour

Light yellow

Black

Black, grey

White, black

Silver white

Silver white

Bending strength

MPa

300~400

400~500

800~1200

950~1200

2400

2600

Elastic modulus E

GPa

380

350

300-320

210

208

200

Poisson's ratio

 

0.22

0.14

0.26

0.3

0.3

Hardness

Hv

1800

2000~2500

1400~1700

1100~1300

700~800

700~800

HRC

80

85~90

75~80

70~75

58-62

58-62

Fracture toughness

MPa·m1/2

3.0~4.0

3.0~4.0

5.0~7.0

8.0~10.0

20

25

Maximum use temperature

1000

1300

800

400

120

150

Thermal expansion coefficient

10-6/℃

8.4

4.0

3.3

10.3

11

17

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