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Project
Test the condition
 Unit
99 porcelain
 95 porcelain Talc porcelain Oxidize the zirconium porcelain Oxidize the titanium porcelain
Backbone 99%AL2O3 95%AL2O3 MgO.SiO2 ZrO2 TiO2
Physical property Density of volume Normal atmospheric temperature g/cm3 3.80 3.60 2.80 6.00 4.00
Airtight Normal atmospheric temperature Pass Pass ¡ª Pass Pass
Absorbing water rate Normal atmospheric temperature % 0 0 0 0 0
Temperature that frit ¡ãC 1800 1650 1350 1750 1400
Mechanical performance Rockwell hardness Normal atmospheric temperature HRA 88 86 76 85 80
Resist the intensity of turning back Normal atmospheric temperature Mpa 350 320 150 1400 70
Compression strength Normal atmospheric temperature Mpa 1300 1200 900 3000 600
Hot performance Use temperature at most ¡ãC 1700 1600 1200 1000 1200
Heat resistant shaking
20O¡ãC-1100O¡ãC 10Num Pass Pass Pass Pass Pass
Hot coefficient of expansion
20O¡ãC-80O¡ãC ¡Á10-6mm/¡ãC 6.5-8.5 6.5-8.0 5.0-6.2 9.5 ¡ª
Heat-conduction rate 25¡ãC W/m.k 29 25 2.90 3.00 25
300¡ãC W/m.k 18 13 2.00 ¡ª ¡ª
Dielectric constant The medium lossing 1MHz2O¡ãC ¡Á10-4 ¡Ü2.5 ¡Ü4 ¡Ü8.0 ¡ª ¡ª
The angle tangent is worth 1MHz8O¡ãC ¡Á10-4 ¡Ü3.5 ¡Ü4.2 ¡ª ¡ª ¡ª
Dielectric strength Normal atmospheric temperature KV/mm 15 16 20 ¡ª ¡ª
Dielectric constant 1MHz2O¡ãC 9-10.5 9-10 ¡Ü7.5 ¡ª ¡ª
Resistivity of volume 2O¡ãC ¦¸.cm >1012 >1012 >1013 >1012 >1012
10O¡ãC ¦¸.cm 1012-1013 1012-1013 1010-1011 ¡ª ¡ª
30O¡ãC ¦¸.cm >1012 3.1¡Á109 5¡Á108 5¡Á109 ¡ª

Surface treatment way Roughness of surface
General polishing 0.8um-1um
Ordinary precise polishing 0.2um-0.3um
Special precise polishing ¡Ü0.1um
The remarks: The above-mentioned characteristics are only taken from and test sampling. These data only play a consulting role to other different forms and products of the size, do not do the contract and deliver goods to agree on.
 
 
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