Non-ferrous Metals
Metal Capillary
Advanced Ceramics
Boron Nitride Ceramic
Pyrolytic Boron Nitride
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Aluminum Nitride Ceramic
Zirconia Ceramic
Alumina Ceramic
Silicon Carbide Ceramic
Deposition Materials
Semimetal Elements
Functional Materials
Neodymium Magnets
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Rare Earth Elements
Alumina Fasteners
Al2O3 Ceramic Fasteners, Nuts, Washers, Screws
Alumina fasteners mainly include ceramic screws, nuts, washers, etc. It has relatively stable physical stability and chemical stability. Physical stability is mainly reflected in high and low-temperature resistance, insulation, anti-magnetic, wear resistance, etc.; chemical stability is mainly reflected in corrosion resistance, oxidation resistance, etc. However, since it is a hard and brittle material, its mechanical properties cannot be compared with metal materials at present. Of course, with the advancement of material technology and the improvement of product structure, the gap between the two is gradually narrowing.
Specifications of Alumina Fasteners
| Item | Unit | Al2O3 |
| Physical Property | ||
| Color | Ivory | |
| Density | g/cm3 | 3.7-3.9 |
| Purity | % | 95~99.8 |
| Gas Permeability | 0 | |
| Water Absorption | 0% | |
| Mechanical Properties | ||
| Vickers Hardness | GPa | 12.3-17.2 |
| Flexural Strength | MPa | 300-380 |
| Compressive Strength (HV0.5) | MPa | 2000-2350 |
| Elastic modulus | GPa | 270-380 |
| Fracture Toughness | MPam1/2 | 3.5-4 |
| Thermal Properties | ||
| The Max Working Temperature | ℃ | 1650 |
| Thermal Conductivity at room temperature | W/(m·K) | 20-32 |
| Coefficient of Thermal Expansion | 10-6/℃ | 6.5-7.2 |
| Thermal Shock Resistance | △T℃ | 200 |
| Electrical Properties | ||
| Dielectric Strength | KV/mm | 10-15 |
| Dielectric Constant | 9-10 | |
| Dielectric Loss Angle(1MHz) | 0.0002-0.0003 | |
| Volume Resistivity | Ω·cm | >1014 |
The above chart just demonstrates the typical properties of common alumina ceramic we use to produce our alumina parts. Please notice that the properties of customized alumina parts vary due to different processing. Edgetech Industries, Advanced Ceramics Division provides alumina products according to your specified instructions or does its best to meet requirements.
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Boron Nitride Tube -
BN Tubes
Application of alumina ceramic fasteners
Alumina fasteners have excellent characteristics such as high-temperature resistance, good electrical insulation, non-magnetic, corrosion-resistant, environmentally friendly and beautiful, and never rust. They are not only comparable to traditional plastic screws and metal screws, but also the performance of ceramic screws has been continuously improved in recent years, and the application field has become wider and wider. In some fields, they have continuously replaced and replaced traditional screws.
-Aerospace industry (insulation and anti-interference devices on electronic equipment)
-Electronic industry (insulation, anti-interference, lightweight)
-Medical equipment industry (insulation, non-magnetic, environmentally friendly, anti-interference, making medical machinery and equipment safer to use)
-Petrochemical industry (high-temperature resistance, chemical resistance, corrosion resistance, extending the service life of the equipment)
-Communication industry (insulation, non-magnetic, safety)
-Ship industry (acid resistance, alkali resistance, corrosion resistance, extending service life), etc.
Packing of alumina ceramics
As a ceramic material, Alumina Fasteners are quite fragile in a lot of cases. Our Alumina Ceramics are carefully handled to minimize damage during storage and transportation. Suitable outer boxes and inner cushioning materials are used, and vacuum packing is also engaged for some of the parts.