昆山迈拓瑞和能源材料科技---热等静压和气压烧结氮化硅性能比较

密度Density

g/cm³

3.22~3.26

3.24~3.26

吸水率Water Absorption

%

0

0

力学性能

Mechanical Characteristics

维氏硬度Vickers Hardness (Load 5KG)

Gpa

14.5

15

抗弯强度Flexural Strength

Mpa

700

1000

抗压强度Compressive Strength

Mpa

3200

3900

杨氏模量Young’s Modulus of Elasticity

Gpa

310

310

泊松比Poisson’s Ratio

-

0.28

0.28

断裂韧性Fracture Toughness

Mpa·m^1/2

6-7

7

热学性能

Thermal Characteristics

热膨胀系数

Coefficient of Thermal   Expansion

40-400

*10^-6/°C

3.2~3.4

3.5

热导率Thermal Conductivity

20 °C

W(m·K)

18~22

23

电学性能

Electrical Characteristics

Volume Resistivity

20 °C

Ω·cm

≥1014

≥1014

Dielectric Constant (1MHz)

-

-

-