Ceramic Cylinder

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Technical Datai
Breaking Strength
at Room Temperature
a Y900Mpa
Fracture Toughness
at Room Temperature
6.0-8.0 Mpa.m1/2

Volume Density
3.20-3.4g/cm3
Volume Resistivity
at Room Temperature
1014IC.cm

Relative Dielectric Constant
at Room Temperature
6-7
Heat Conductivity
23-25W/i m-ki

Thermal Expansion Coefficient
3.1A 10-6/a
Hardness
HRA92-94





Main Performance Indexes of Silicon Nitride Ceramics:i



Performance
Reactive Sintering
Silicon Nitride
Normal Pressure
Sintering Silicon Nitride
The Companya s
Hot Pressed Sintering
Silicon Nitride

Volume Density
i g/cm3i
2.21
3.15
3.2~3.3

Bending Strengthi Mpai
137.3
490.3
a Y900

Fracture Toughness
(MpaA.m1/2)
2.17
4.71
6.0~8.0

Hardness
(HRA)
\
87.0
92.0~94.0

Heat Conductivity Coefficient
(W/mA.k)
5.44
12.56
23~25

Thermal Expansion Coefficient
I 10-6 a
(RT~1200a )
3.2
3.2
2.95~3