Alumina Ceramic Plate
Alumina, also known as Aluminum Oxide, is a hard wearing advanced technical ceramic material frequently used in a wide variety of industrial applications. Once fired and sintered, it can only be machined using diamond-grinding methods. It features high hardness and wear resistance, low erosion levels, high temperature resistance, corrosion resistance, and
bioinertness.Additionally, it can be highly polished, making it useful for a wide range of applications.
Al2o3 Ceramic Disc Properties:
1. Good electrical insulation
2. Moderate thermal conductivity
3. High corrosion and wear resistance
4. Good gliding properties
5. High mechanical strength
6. High compressive strength
7. High hardness
|
Property
|
Unit
|
92% Alumina Ceramic
|
95% Alumina Ceramic
|
99% Alumina Ceramic
|
|
|
Density
|
g/cm3
|
≥3.63
|
≥3.68
|
≥3.83
|
|
|
Water absorption
|
%
|
O
|
O
|
O
|
|
|
Sintering temperature
|
°C
|
1500-1700
|
1600-1800
|
1700-1800
|
|
|
Hardness
|
HV
|
≥1400
|
≥1500
|
≥1650
|
|
|
Flexural strength
|
Kgf/cm2
|
3000
|
3000
|
3000
|
|
|
Compressive strength
|
Kgf/cm2
|
24000
|
25000
|
26000
|
|
|
Fracture toughness
|
Map.m3/2
|
3~4
|
3~4
|
4~5
|
|
|
Maximum temperature
|
°C
|
1600
|
1700
|
1800
|
|
|
Coefficient of thermal expansion
|
/°C
|
8*10-6
|
8*10-6
|
8*10-6
|
|
|
Heat shock
|
T(°C)
|
220
|
220
|
220
|
|
|
Thermal conductivity
|
W/m.k(25-300°C)
|
25 14
|
25 14
|
25 14
|
|
|
20°C
|
>1012
|
>1012
|
>1012
|
||
Advantage:
1.Purity:92%, 95%, 96%, 99%, 99.7%
2.Good mechanical strength
3.Excellent electrical insulation
4.High-frequency loss
5.Good thermal conductivity
6.Heat, wear and corrosion resistance.
4.High-frequency loss
5.Good thermal conductivity
6.Heat, wear and corrosion resistance.
Application:
Alumina is the best-known advantaced ceramicmaterial, is widely used in
1.Automotive
2.Petro-chemical
3.Fluid control
4.Material transfer
5.Industry
6.Electrical and electronic
7.Semiconductor
8.Sapphire is single-crystal alumina.
Alumina is the best-known advantaced ceramicmaterial, is widely used in
1.Automotive
2.Petro-chemical
3.Fluid control
4.Material transfer
5.Industry
6.Electrical and electronic
7.Semiconductor
8.Sapphire is single-crystal alumina.
