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Product center >> Sealing ring materials

alumina(AL2O3) ceramic

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.
 
Physical parameter of AL2O3
Technical parameter
unit
95%
99%
99.5%
 Al2O3 value
%
95
99
99.5
volume density
g/cm3
3.7
3.88
3.9
hardness
HRA
85
88
90
 indicated porosity
%
<0.4
<0.2
<0.15
Tensile strength
Mpa
250
310
350
Coefficient of heat expansion
10-6/K
5.5
5.3
5.2
 coefficient of heat conductivity
W/M.K
27.8
26.7
26
 
 
 
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