Features of alumina ceramic
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- Relatively low density&#;
- Extremely high operating temperature&#;
- Very high hardness and compressive strength&#;
- Excellent electrical insulation properties&#;
- Corrosion and wear resistance&#;
- Biologically inert, food compatibility&#;
Alumina Ceramic Properties
The following only lists the performance parameters of the three most common aluminum oxide ceramics. Normally, alumina ceramics are composed of these types.
Mechanical Properties
Properties
Unit
95%Al2O3
99%Al2O3
99.5%Al2O3
Colour
&#;&#;
White
Yellow
Yellow
Density
g/cm³
3.7
3.85
3.9
Hardness
GPa
13.7
15.2
15.7
Compressive Strength
MPa
Flexural Strength
MPa
280
310
350
Fracture Toughness
MPa&#;m1/2
3~4
3~4
4.5
Modulus of Elasticity
GPa
320
360
370
Poissons Ratio
&#;&#;
0.23
0.23
0.23
Thermal Properties
Properties
Unit
95%Al2O3
99%Al2O3
99.5%Al2O3
Maximum Use Temperature
&#;(No load)
Thermal Conductivity @ 20°C
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24
29
32
Thermal Expansion a at 20&#;400°C
1 x 10-6/°C
7~8
7~8
7~8
Specific Heat
J/(kg&#;K)
780
790
780
Thermal Shock Resistance
&#;(Put in water)
200
200
200
Electrical Properties
Properties
Unit
95%Al2O3
99%Al2O3
99.5%Al2O3
Dielectric Constant
1MHz
9.4
9.9
9.9
Dielectric Strength
V/m
15 x 106
15 x 106
15 x 106
Dielectric Loss
1MHz
4 x 10-4
4 x 10-4
4 x 10-4
Volume Resistivity @ 25°C
Ω&#;cm
&#;
&#;
&#;
Volume Resistivity @ 500°C
Ω&#;cm
&#;108
&#;108
&#;
*The values are typical material properties and may vary according to products configuration and manufacturing process. For more details, Please feel free to contact us.
What can alumina ceramics be used for?
- Wire and wire guide;
- Mechanical seal components:
- Machine parts;
- Electronic parts and substrates;
- Ballistic armor&#;
- Roller and ball bearings;
- Wear-resistant lining;
- Semiconductor parts&#;
- Precision shafts and sleeves in high-wear environments;
Alumina Ceramic Components
Alumina Ceramic Machining & Casting
Great Ceramic is an expert in the production of technical ceramics. Since , we have participated in and provided more than 3,000 precision ceramic products to hundreds of companies.
We can provide you with ceramic machining, ceramic materials, ceramic casting, ceramic metal packaging and surface metallization services. We are committed to providing products and services that meet or exceed customer quality requirements.
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Alumina Oxide Ceramic Component Machining
Great Ceramic is your alumina ceramic machining expert and can meet your technical ceramic prototyping needs. We are always happy to use our years of advanced ceramic experience to provide advice on materials, designs and applications. If you want to buy alumina plates, rods, tubes or custom machined parts, please contact us and each of our experts will be happy to help you.
If you want to learn more, please visit our website Aluminum Oxide Ceramics China.
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