About Aluminum Oxide Ceramics (Al2O3)
Aluminum oxide ceramics (Al2O3) is the most common advanced ceramic material with high hardness. The material has excellent properties in terms of electrical insulation, high thermal conductivity, high chemical resistance, good wear resistance and low thermal expansion.
Alumina ceramics can be divided into several application grades according to their alumina content. Among them, 99% alumina ceramic materials are used to make high-temperature crucibles, refractory furnace tubes and special wear-resistant materials (e.g., ceramic bearings, ceramic seals, water valve disks, etc.); 95%-96% alumina ceramics are mainly used for corrosion-resistant, wear-resistant parts and circuit substrates.
Aluminum oxide color:
Alumina ceramics vary in color depending on their alumina content. 95%-96% alumina ceramics are milky white, while 99% alumina ceramics are yellow.
Density of aluminum oxide ceramics:
Alumina ceramics vary in density depending on their alumina content. 95%-96% alumina ceramics are 3.7-3.8g/cm³, while 99% alumina ceramics are 3.8-3.9g/cm³.
Alumina ceramics with an alumina content of 95% or 96% are referred to as 95 porcelain or 96 porcelain;
What are the aluminum oxide ceramic parts?
Alumina Ceramic Plunger
Surface roughness up to Ra0.2um
95 Aluminum Oxide Ceramic Tubes
Diameter size can be customized
Alumina Ceramic Threaded Pipe
Can be customized with various non-standard threads
95 Alumina ceramic shaped parts
CNC high-precision customized processing
Aluminum oxide ceramic locating pins
Ultra-hard and wear-resistant
Aluminum oxide ceramic bolts
non-conductive
Alumina ceramic wear ring
Surface can be polished
Alumina Ceramic Structural Parts
Can be used in high temperature environments
Alumina Ceramic Laser Processing
High precision and efficiency in processing
View MoreAluminum oxide ceramic parts
Performance characteristics of alumina ceramics
Advantages of Aluminum Oxide Ceramics
Mechanical Properties of Alumina Ceramics
| sports event | unit (of measure) | 95% Aluminum Oxide | 99% Aluminum Oxide | 99.5% Aluminum Oxide |
|---|---|---|---|---|
| color | -- | fig. reactionary | yellow (color) | yellow (color) |
| intensity | g/cm³ | 3.7 | 3.85 | 3.9 |
| durometer | GPa | 13.7 | 15.2 | 15.2 |
| compressive strength | MPa | 2000 | 2160 | 2350 |
| bending strength | MPa | 280 | 310 | 350 |
| Fracture toughness | MPa・m1/2 | 3~4 | 3~4 | 4.5 |
| Young's modulus | GPa | 320 | 360 | 370 |
| Poisson's ratio | -- | 0.23 | 0.23 | 0.23 |
Thermal Properties of Alumina Ceramics
| sports event | unit (of measure) | 95% Aluminum Oxide | 99% Aluminum Oxide | 99.5% Aluminum Oxide |
|---|---|---|---|---|
| Maximum operating temperature | ℃ | 1650 | 1650 | 1650 |
| Thermal conductivity@20℃ | W/(m・K) | 24 | 29 | 32 |
| Coefficient of linear thermal expansion | 40 - 400°C, x 10-6/C | 7~8 | 7~8 | 7~8 |
| specific heat | J/(kg・K) | 780 | 780 | 780 |
| thermal shock resistance | ℃ (into water) | 200 | 200 | 200 |
Electrical Characteristics of Alumina Ceramics
| sports event | unit (of measure) | 95% Aluminum Oxide | 99% Aluminum Oxide | 99.5% Aluminum Oxide |
|---|---|---|---|---|
| dielectric constant | 1MHz | 9.4 | 9.9 | 9.9 |
| dielectric strength | V/M | 15×106 | 15×106 | 15×106 |
| dielectric loss | 1MHz | 4×10-4 | 2×10-4 | 1×10-4 |
| Volume resistance@20℃ | Ω・cm | ＞1014 | ＞1014 | ＞1014 |
| Volume Resistance@500℃ | Ω・cm | ＞108 | ＞108 | ＞1010 |
Note: All the parameters in the above table are typical values for alumina ceramics, please note that they may vary from batch to batch.
What are the uses of aluminum oxide ceramics?
- Insulated tubing and wire guides;
- Mechanical seal assembly:
- Mechanical structural parts.;
- Electronic parts and substrates;
- Ballistic Armor;
- Roller and ball bearings;
- Wear-resistant lining;
- Semiconductor parts;
- Precision shafts and sleeves in high wear environments;
Machining manufacturer of aluminum oxide ceramic parts
To Good Ceramics is a professional aluminum oxide ceramics processing manufacturer. Since 2013, we have been involved in and supplied more than 3,000 precision ceramic products to hundreds of companies.
We can provide you with ceramic machining, ceramic materials, ceramic casting, ceramic metal encapsulation and surface metallization services, and are committed to providing products and services that meet or exceed our customers' quality requirements.
Alumina ceramics custom processing
To Good Ceramics is your custom machining specialist for aluminum oxide ceramics, and we can meet your advanced ceramic prototyping needs. We are always happy to utilize our years of advanced ceramics experience to advise on materials, designs and applications. If you are looking to purchase alumina plates, rods, tubes, or custom machined parts, please contact us and each of our experts will be happy to assist you.
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