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>> Ceramic mechanical seal faces or rings
 
Ceramic seal faces have the property of the resistant-high-temperature,resistant-corrosion,resistant-wearing and good sealing and are widely used in spacecraft,machinery,metallurgy,printing and dyeing, foodstuff,pharmaceutical, auto industry and so on.
AI2O3 Ceramic physical property
Technical Parameter
Unit
95%
99%
99.5%
Content of Al2O3
%
95
99
99.5
Density
g/cm3
3.7
3.88
3.9
Hardness
HRA
85
88
90
Porosity Rate
%
<0.4
<0.2
<0.15
Fractural Strength
Mpa
250
310
350
Coefficient of Heat Expansion
10-6/K
5.5
5.3
5.2
Thermal Conductivity
W/M.K
27.8
26.7
26
 
 



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