Alumina ceramic blocks are made from high-quality alumina (Al₂O₃) and are high-performance industrial ceramic components.
GORGEOUS CERAMICS (GGS) specializes in custom-made alumina ceramics with high precision, high dimensional accuracy, and complex geometries, providing a one-stop solution from ceramic forming and sintering to CNC precision machining and surface treatment.
We serve a variety of industries, including semiconductor equipment, industrial machinery, electrical insulation systems, wear-resistant structures, laser equipment, medical devices, and automation. Simply provide us with drawings and application details to customize high-quality ceramic structural components.
Alumina ceramic performance table
| Property | Unit | AL2O3 99.7 | AL2O3 99.5 | AL2O3 99 | AL2O3 95 |
| Purity | — | 99.7% | 99.5% | 99% | 95% |
| Density | g/cm3 | 3.92 | 3.9 | 3.8 | 3.7 |
| Bending Strength | MPa | 375 | 370 | 340 | 304 |
| Compressive Strength | MPa | 2450 | 2300 | 2250 | 1910 |
| Elastic Modulus | GPa | 380 | 370 | 330 | 330 |
| Fracture Toughness | MPam1/2 | 4.5 | 4.3 | 4.2 | 3.8 |
| Hardness | HRA | 91 | 91 | 90 | 89 |
| Vickers Hardness | HV1 | 1600 | 1550 | 1450 | 1400 |
| Thermal Expansion Coefficient | 10- 6 K-1 | 7.8 | 7.8 | 7.7 | 7.5 |
| Thermal Conductivity | W/mk | 32 | 32 | 25 | 25 |
| Thermal Shock Stability | △T.℃ | 220 | 220 | 200 | 200 |
| Maximum Operating Temperature | ℃ | 1750 | 1750 | 1700 | 1500 |
| Volume resistance at 20℃ | Ω·cm | 1015 | 1015 | 1014 | 1014 |
| Dielectric Strength | KV/mm | 22 | 20 | 16 | 15 |
| Dielectric Constant (room temperature) | / | 10 | 11 | 11.5 | 11 |
| MHz Dielectric Loss Factor | tan δ | 1×10-3 | 1×10-3 | 3×10-3 | 3×10-3 |
| Name | Alumina | |||
| Purity | 99.95% | 99.7% | 99% | 95% |
| Thermal expansion coefficient (25°C-800°C) 10-6 /°C |
7.5-9.5 | 8.2-10.2 | 8.0-9.8 | 8.5-10.5 |
| Thermal expansion coefficient (25°C-300°C) 10-6 /°C |
6.5-8.0 | 7.2-8.7 | 7.0-8.5 | 7.5-9.0 |
| Maximum stable working temperature | 1750 | 1700 | 1500 | 1500 |
| Thermal conductivity (normal temperature 25°C) W/（m·K） |
45 | 30 | 20 | 15 |
| Thermal conductivity (high temperature 1000°C) | 30 | 20 | 15 | 10 |
| Dielectric constant | 10 | 9 | 8 | 7 |
| Resistivity (25°C) | >1014 | >1014 | >1014 | >1014 |
Applications of alumina ceramic blocks
Semiconductor Industry
In the semiconductor industry, zirconia ceramic structural blocks are used in wafer handling components, as well as in insulating structural plates, precision components in vacuum systems, and positioning structures.
Industrial Automation
In the automation industry, zirconia ceramic blocks have even wider applications, including wear-resistant guideways, insulating clamps, mechanical positioning blocks, and robotic systems.
Electrical & Electronics
In the electrical and electronics industries, alumina ceramic structural blocks are commonly used as insulating powder coatings and high-voltage insulating structural components.
Why Choose GORGEOUS CERAMICS (GGS)
GORGEOUS CERAMICS boasts 15 years of experience in ceramic manufacturing and is certified to ISO 9001:2015, IATF 16949:2016, and ISO 14001:2015 environmental management systems. This demonstrates GORGEOUS’s capability to provide customers with high-quality structural components made of alumina ceramics.
We offer OEM manufacturing and custom design services based on customer drawings or samples, catering to a wide range of needs from small-batch prototyping to large-scale industrial production.
FAQ
What are the differences between 95% alumina ceramic blocks and 99% alumina ceramic blocks?
99% alumina ceramic blocks offer superior performance, including higher hardness, better wear resistance, better electrical insulation, and stronger corrosion resistance. 95% alumina ceramic blocks, on the other hand, are more affordable.
What level of precision can GORGEOUS CERAMICS (GGS) achieve?
For precision-machined alumina ceramic blocks, we can achieve a precision of ±0.001 mm, depending on the structure and size.
Does alumina ceramic block have electrical insulation properties?
Yes, alumina is a material with excellent electrical insulation properties and can be widely used in high-voltage and electronic fields.
