Alumina/Aluminum Oxide (Al2O3) ceramic materials.
Alumina Ceramics – Aluminum Oxide (Al2O3)
Alumina or aluminum oxide (Al2O3) in its various levels of purity is used more often than any other advanced ceramic material. Coraynic Technology Limited offers a wide range of material types with different property profiles that can be adjusted via a targeted matrix design. Characterized by high mechanical strength, high purity, high pressure resistance, corrosion resistance, good insulating properties, high tensile strength, and good vacuum air-tightness qualities,which are widely used in aerospace, nuclear industry, weapons group, electronic communications, medical equipment and other fields.
Alumina/Aluminum Oxide (Al2O3) ceramic materials.
A-95, A-97, A-99, A-99.8 four grades of alumina products, according to the user’s different application needs, the preparation of high mechanical strength, high purity, high density, high insulation, high pressure, acid and alkali corrosion and other ceramic parts; molding process to take the cold isostatic pressure, hot die casting, dry compression of three kinds of molding methods, not only to strictly control the high-precision products of the mass production, but also to realize the large quantities of ceramic processing. The molding process adopts three types of molding methods: cold isostatic pressing and hot die casting, and dry die casting.
Processing precision: μm level
Size range: small hole ф0.2, outer diameter ф300
A-95 Aluminum oxide ceramic products
Properties of A95 Alumina/Aluminum Oxide ceramic(Al2O3)
Performance Parameters of Alumina Whiteware:
| Density | ≥3.80 | g/m³ |
| Air lmpermeability | <5.0*10 ^-12 | Pa. m³/s |
| Flexural strength | 385 | MPa |
| Average Linear Expansion Coefficient | 7.0×10^-6
7.6 x10^-6 |
|
| Dielectric constant | 9.2 | |
| Tangent of Dielectric Loss Ange! | 3.0*10 ^-4 | |
| Volume Resistivity （100°C） | 3.3*10^14 | Ohm.cm |
| Average Grain Size | 10~20 | µm |
| Breakdown Strength | 38 | Kv/mm |
1、Composition: 95% alumina content.
2、Characteristics: heat-resistant, insulation, thermal shock resistance, good mechanical properties.
3, the main application: precision ceramic parts
Polished substrates, ceramic capacitors for pressure sensors, vacuum feedthroughs, connectors, relays, etc.
A-97 Aluminum oxide ceramic materials.
1, composition: alumina content of 97%, calcium aluminum silicon ternary system ceramics.
2, features: chemical stability, breakdown strength, volume resistivity are good.
3, the main application: high temperature and high insulation ceramic parts, bioceramics and so on.
| Density | ≥3.82 | g/m³ |
| Air lmpermeability | <5.0*10 ^-12 | Pa. m³/s |
| Flexural strength | 404 | MPa |
| Average Linear Expansion Coefficient | 7.10x10^-6
7.8 x10^-6 |
|
| Dielectric constant | 8.5 | |
| Tangent of Dielectric Loss Ange! | 4.0*10 ^-4 | |
| Volume Resistivity （100°C） | 1.0*10^14 | Ohm.cm |
| Average Grain Size | 10~20 | µm |
| Breakdown Strength | 42 | Kv/mm |
A-99 Aluminum Oxide Ceramic Products
1, Composition: 99% alumina content
2, Characteristics: mechanical strength 455MPa, breakdown strength 54kv/mm, excellent corrosion resistance index.
3, the main application: heat-resistant corrosion-resistant wear-resistant high-pressure parts.
| Density | ≥3.91 | g/m³ |
| Air lmpermeability | <5.0*10 ^-12 | Pa. m³/s |
| Flexural strength | 455 | MPa |
| Average Linear Expansion Coefficient | 7.10x10^-6
7.8 x10^-6 |
|
| Dielectric constant | 9.3 | |
| Tangent of Dielectric Loss Ange! | 4.0*10 ^-4 | |
| Volume Resistivity （100°C） | 2.60*10^14 | Ohm.cm |
| Average Grain Size | 8~16 | µm |
| Breakdown Strength | 54 | Kv/mm |
Alumina oxide Metallized ceramic materials
Self-developed metallization formula, successfully solved the bottleneck problem of high-density fine grain porcelain metallization, with metallization layer welding bonding force, and solder wettability is good, is the key to achieve high quality gas tightness welding products. Greatly improve the company’s competitive core force.
The company has strong metallization coating strength, and various structures of outer circle, plane, inner hole and step can be realized. Successfully developed metallized ceramic products with small aperture (minimum 0.2mm), large plane shaped parts and other structures.
Aluminum oxide ceramic sealing products
Alumina ceramic-to-metal sealing products are widely used in the fields of electric vacuum, automatic control, microelectronics, optoelectronics, aerospace, nuclear power and so on. Our company utilizes high temperature brazing, electron beam welding, laser welding and other welding methods to seal ceramics with oxygen-free copper, molybdenum-copper, titanium alloys, deforestation alloys and other metals, and provides customers with ceramic-metal sealing products with excellent insulation performance, tensile strength and vacuum airtightness.
Applications for aluminum oxide Al2O3advanced ceramics are heavy-duty forming tools, substrates and resistor cores in the electronics industry, tiles for wear protection and ballistics, thread guides in textile engineering, seal and regulator discs for water taps and valves, heat-sinks for lighting systems, protection tubes in thermal processes or catalyst carriers for the chemicals industry.
Advantages Application
Excellent mechanical strength Power semiconductor modules
Excellent electrical insulation Concentrator Photovoltaic Arrays (CPV)solar arrays
High thermal stability solid-state relays
High thermal conductivity High frequency switch mode power supplies(SMPS)
The thermal expansion coefficient is close to that of silicon Electronic heating devices
may be structured just like printed circuit boards Automobile electronics
Power LED module
Electronic heating devices
substrates have been used widely in electric
power and electronic industry.
