Alumina Ceramic Elements (accept custom)
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Advantages of Alumina Ceramic Elements
1. Compared to metal material rings, the wear rate of alumina ceramic ring parts can be reduced several times or even tens of times, significantly improving the stability and reliability of mechanical equipment operation.
2. Alumina ceramic ring parts are excellent electrical insulation materials with high electrical resistivity and low dielectric loss.
3. Alumina ceramic ring parts can maintain their physical and chemical stability in high temperature environments.
4. Through advanced molding and processing techniques, high-precision customized dimensions of alumina ceramic ring parts can be achieved.
5. Alumina ceramic ring parts with various specifications, shapes, and properties can be customized according to different application needs.
6. The density of alumina ceramics is relatively low compared to metallic materials, but their strength is high. Alumina ceramic ring parts have significant advantages in applications that require strict weight requirements and high structural strength.
Applications of Alumina Ceramic Elements
1. In the field of mechanical seals, alumina ceramic ring parts serve as sealing rings that can effectively resist the erosion and friction of the medium, greatly extending the service life of the sealing device and reducing the frequency of equipment maintenance.
2. In high-frequency circuits, its low dielectric loss characteristics can reduce energy loss during signal transmission, improve the quality and efficiency of signal transmission, and enable electronic devices to operate more efficiently.
3. Alumina ceramic ring parts can provide a good fitting surface for some equipment that requires strict surface quality, such as rotating parts in precision instruments and mirror support rings in optical equipment.
4. In the valve components of automobile engines, the use of alumina ceramic ring parts can reduce the weight of the components while improving the fatigue resistance and high temperature resistance of the valves, which helps to improve the fuel economy and power performance of the engine.
Performance index
Composition table
| NAME | CONTENT(%) |
| Al2O3 | 99.3-99.5(99.7) |
| SiO2 | 0.3-0.5 |
| CaO+MgO | 0.2-0.3 |
| K2O+Na2O | 0.2-0.35 |
| Fe2O3 | <0.1 |
| OTHER | <0.05 |
Alumina ceramic performance index (Notice of Correct in Leakeage Rate）
NO. | Property | Unit | Alumina |
1 | Al2O3 | % | >99.3 |
2 | SiO2 | % | - |
3 | Density | g/cm3 | 3.88 |
4 | Water absorption | % | 0.01 |
5 | Cold compressive strength | MPa | 350 |
6 | 20ºC leakage rates | Torr・L/sec | >10-11=1.33322×10-12Pa・m3/sec |
7 | Twisting in high temperature | mm | 0.2 allowed in 1600ºC |
8 | Bonding in high temperature | not bonded in 1600ºC | |
9 | 20-1000ºC coefficient ofthermalexpansion | mm.10-6/ºC.m | 8.2 |
10 | Thermal conductivity | W/m.k | 25 |
11 | Electric insulation strength | KV/mm | 20 |
12 | 20ºCdirect current insulation resistance | Ohm/cm | 1014 |
13 | High-temperature insulation resistance | 1000ºC MΩ | ≥0.08 |
1300ºC MΩ | ≥0.02 | ||
14 | Thermal shock resistance | 4 times not cracked in 1550ºC | |
15 | Maximum working temperature | ºC | 1800 |
Factory Equipment
Slip casting moulding: Inject the prepared slurry into the gypsum mold and let it stand for a period of time to allow the gypsum mold to absorb moisture. The slurry forms a uniform body on the inner wall of the mold.
Injection moulding: Inject a slurry containing paraffin into a metal mold at a certain temperature and pressure, and after the body cools and solidifies, perform demolding to prepare ceramic bodies.
Extrusion moulding: Suitable for long tube products, the powder is extruded into shape through an extruder.
FAQ
Q1. What information should we supply to get a quote?
A1. Please offer the specification of ceramic tube, such as shape, dimension, quantity, application etc.
Q2. What is the hardness of alumina ceramic parts?
A2. Alumina ceramic parts have extremely high hardness, with a Mohs hardness typically reaching 8-9 levels, second only to diamond.
Q3. How to control the temperature and atmosphere during sintering of alumina ceramic parts to ensure product quality?
A3. Choose a sintering temperature of 1400-1700 ℃ based on purity and hold for several hours. Atmospheric sintering has low cost, while hot pressing sintering increases density and mechanical properties under pressure. Atmospheric sintering avoids oxidation in inert gas or vacuum environments.
Certificates
Feedback
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