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99.9 Alumina ceramic
Location:Home > Ceramic materials >99.9 Alumina ceramic
 Alumina ceramics is a kind of very wear-resistant ceramic material, is widely used in various Lv industry.The main forming methods of alumina ceramics are dry pressing, grouting, extrusion, isostatic pressing, injection and flow ductility.High temperature sintered alumina ceramic products can only be processed by diamond grinding process.Alumina ceramic material has very high hardness and wear resistance, corrosion resistance, high temperature corrosion resistance and biological inertia.In addition, high temperature sintered alumina can be highly polished.

Performance parameters of alumina ceramics
Type Unit 99.9ceramic
Alumina content % 99.9
Density g/cm3 3.94
Color - -
Water absorption % 0
Young's modulus Gpa 359
Webster Hardness Gpa 26
Compressive strength Mpa 2558
Flexural Strength Mpa 315
Thermal conductivity W/m.k 35-40
Thermal shock resistant strength △(℃) 225
Maximum usage temperature 1770
Volumetric resistivity Ω.cm >10∧14
Dielectric constant - 9.86
Dielectric strength KV/mm 23.8

Properties of Alumina/Aluminum Oxide (Al2O3)
1.Very good electrical insulation (1x1014 to 1x1015 Ωcm)
2.Moderate to extremely high mechanical strength (300 to 630 MPa)
3.Very high compressive strength (2,000 to 4,000 MPa)
4.High hardness (15 to 19 GPa)
5.Moderate thermal conductivity (20 to 30 W/mK)
6.High corrosion and wear resistance
7.Good gliding properties
8.Low density (3.75 to 3.9 g/cm3)
9.Operating temperature without mechanical load 1,000 to 1,500°C.
10.Bioinert and food compatible
Products and Aplications
– Pieces, Plates, Boards, Trays, etc. in Alumina-Ceramic / Cordierite-Mullite
– Tubes, Rods, Rollers, Supports, etc. in Alumina-Ceramic / Cordierite-Mullite
– Protection, Thermocouples, Insulation, etc. in Alumina-Ceramic / Cordierite-Mullite
– Pieces, Plates, Tubes, Rods, Rollers, etc. in Zirconium Oxide
– others 

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