High Thermal Conductivity and Wear Resistant ALN Aluminum Nitride Ceramic Ring Gaskets
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What's is Aluminum Nitride Ceramics?
Aluminum nitride, a covalent bond compound, is an atomic crystal belonging to a diamond-like nitride, a hexagonal system, a wurtzite crystal structure, non-toxic, white or grayish white. The AIN crystal is a covalently bonded compound with a [AIN4] tetrahedron as a structural unit, and has a wurtzite structure and is a hexagonal system. Chemical composition AI 65.81%, N 34.19%, specific gravity 3.261g/cm3, white or off-white, single crystal colorless and transparent, sublimation decomposition temperature under normal pressure is 2450 °C. It is a high temperature heat resistant material. Thermal expansion coefficient (4.0-6.0) X10-6/°C. Polycrystalline AIN has a thermal conductivity of 260 W/(m.k), which is 5-8 times higher than alumina, so it has good thermal shock resistance and can withstand extreme heat of 2200 °C. In addition, aluminum nitride is not attacked by aluminum liquid and other molten metals and gallium arsenide, and particularly has excellent corrosion resistance to molten aluminum liquid.
Aluminum Nitride Ceramics properties:
(1) high thermal conductivity (about 170-186W / m · K), close to BeO and SiC, more than 5 times that of Al2O3;
(2) The coefficient of thermal expansion (4.5 × 10 -6 ° C) is matched with Si (3.5 ~ 4 × 10 -6 ° C) and GaAs (6 × 10 -6 ° C);
(3) excellent electrical properties (dielectric constant, dielectric loss, volume resistivity, dielectric strength);
(4) good mechanical properties, higher flexural strength than Al2O3 and BeO ceramics, can be sintered at normal pressure;
(5) high purity;
(6) good optical transmission characteristics;
(7) non-toxic;
(8) It can be produced by a casting process. It is a promising high-power integrated circuit substrate and packaging material.
Data Sheet↓
| Properties of Aluminum Nitride Ceramics |
| Item |
Unit |
Typical Values |
| Physical Properties |
| Color |
White Grey |
| Density |
g/cm3 |
3.3-3.4 |
| Chemical Formula |
/ |
AIN |
| Gas permeability |
0 |
| Water Absorption |
0 |
| Mechanical Properties |
| Moh's Hardness |
|
5 |
| Vickers hardness |
Gpa |
11 |
| Fracture Toughness KIC |
MPa•m1/2 |
2.6 |
| Flexural Strength |
Mpa |
466-496 |
| Compressive Strength |
Mpa(lb/in2x103) |
2100 |
| Modulus of Elasticity(25°C) |
Gpa |
320 |
| Thermal Properties |
| Thermal Conductivity |
W/m·K |
170-186 |
| Thermal Expansion Coefficient |
10-6/ºC |
3.2-3.4 |
| Thermal Shock Resistance |
T (ºC) |
400 |
| Specific Heat(25°C) |
J/kg.K |
720 |
| Maximum Use Temperature |
°C |
2000 |
| Electronic Properties |
| Dielectric Strength |
KV/mm |
17-19 |
| Dielectric Constant |
Er |
8.8 |
| Dielectric Loss Angle |
1 MHz (×10-3) |
0.3 |
| Volume Resistivity(400~600ºC) |
Ω.cm |
2.75*1014 |
Shenzhen Hard Precision Ceramic CO.,Ltd founded in 2007, located in Shenzhen of China. We are a company that integrates development, design, moulding, sintering, production and sales of precision ceramic products. After 10 years of development, we have cooperated with more than 2000 customers and 60 universities; our factory covers an area of 2000 square meters, 50 employees, and annual production value of nearly 20 million. We have a higher visibility and better reputation in the same industry.
Compared with metals material, ceramic materials have excellent properties such as high hardness, high strength, high temperature(fire) resistance, wear resistance, corrosion resistance, acid and alkali resistance, oxidation resistance, insulation, nonmagnetic, good chemical stability and other excellent performance, so it is often used in the environment of the metal material is not up to. Advanced ceramics application prospect are very widely. It's widely used in aerospace, aviation, military industry, nuclear power, machinery, textile, chemical, electronic, food, medical, etc. We provide alumina ceramic, zirconia ceramic, silicon nitride (Si3N4) ceramic, macor (mica glass ) ceramic, aluminum nitride (AIN) ceramic, silicon carbide (SiC) ceramic, boron nitride (BN) ceramic, quartz ceramic, mullite ceramic, cordierite ceramic etc.
Our products include ceramic rods, ceramic tubes, ceramic pipes, ceramic plates, ceramic sheets, ceramic blocks, ceramic nozzles, ceramic plungers, ceramic washers, ceramic spacers, ceramic substrates and precision parts for industrial. We have all-line high precision equipment from ceramic forming, sintering to precision machining. Hope for a wide range of sincere cooperation with customers at domestic and abroad.
Why Choose Us?
1.17 years of professional production industrial ceramics factory
2.High quality products with low price
3.High precision parts with lowest tolerance
4.Short time for production
5.Has a group of experienced, professional and efficient R&D team
6.Has a good reputation in China and abroad.
7.MOQ is not limited, small quantity is welcome.
8.Vigorous team and good after-sales service
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FAQ
Q: Are you trading company or manufacturer ?
A: We are factory.
Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. or it is 15-30 days if the goods are not in stock, it is according to quantity.
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A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
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