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Alumina Substrates
Final Advanced Materials supplies a wide variety of substrates: alumina, zirconia, and aluminium nitride. All our substrates are produced by laser cutting. It is possible to order plates in standard dimensions, or for parts to be cut to a customized design, whether for a prototype or for series production.
Final Advanced Materials has machining facilities which guarantee ISO 9001-certified quality. Our tooling and our expertise permit the production of the most complex components from your plans.
Alumina substrates are highly rated for their good chemical and mechanical resistance. They can be employed for the construction of furnaces, in medical technologies, in electronic sensors, in catalysers, in SOFC fuel cells and for the filtration of liquids.
Two types of alumina substrates are available:
Sintered High-Density Alumina
This substrate is available in the form of two products, the alumina content of which varies between 96 and 99.6 %. Whichever the product, these materials are distinguished by their high resistance to corrosion and abrasion. Moreover, they show good mechanical strength, and can be employed as electrical insulators. They show very low adherence and, by nature, feature exceptional flatness. Finally, alumina substrates show good thermal conduction.
High-density alumina substrates are available in various thicknesses (0.15 – 0.25 – 0.38 – 0.5 – 0.76 – 1 – 1.27 – 1.52 – 2 mm) and in dimensions ranging from 50.8 x 50.8 mm to 168 x 168 mm.
Sintered Porous Alumina
A porous alumina substrate has mechanical, electrical and chemical properties which are similar to those of high density alumina. However, this product is distinguished by its lightness. Its porosity makes it a material of choice for the filtration of gases and liquids, and for the homogeneous diffusion of a fluid.
Porous alumina substrates are available in various thicknesses (1 – 1.5 - 2 mm) and in dimensions ranging from 100 x 100 mm to 168 x 168 mm.
Applications of Alumina Substrates
- Sintering equipment
- Oven construction elements
- Medical technology
- Electronic sensors
- Catalyser
- Filtration of liquids
Benefits of Alumina Substrates
- Hardness
- High mechanical strength
- Dimensional stability, even at high temperatures
- High resistance to wear and corrosion
- Electrically insulating
- Resistance to chemical products
- High-temperature withstand
- Dielectric and ferro-electric properties
- Very low adherence
- Exceptional flatness
- Low thermal conduction
Technical Data of Alumina Substrates
A comparative table for the available alumina ceramic substrates can be downloaded in the data sheet.
Physical variables included in this documentation are provided by way of indication only and do not, under any circumstances, constitute a contractual undertaking. Please contact our technical service if you require any additional information.
FAQs that can help you in this category
Aluminium nitride substrates (AlN) are the ideal solution for optimum thermal dissipation. They have a high thermal conductivity of 170 to 200 W/(m·K), a density of approximately 3.2 g/cm³ and a dimensional stability up to 1,000°C. Alternatively, you can choose alumina substrates (Al₂O₃), which have a lower conductivity (of 25 to 30 W/(m·K)) but which are more cost-effective. AlN effectively dissipates heat from high-power-density circuits, limiting hot spots and increasing reliability. Final Advanced Materials recommends AlN for high-performance applications such as high-power LEDs and thermally sensitive microelectronic components.
Alumina (density of 3.95 g/cm³, Al₂O₃ 99.7%) has a moderate thermal conductivity of 25 to 30 W/(m·K) and a dielectric strength of 10 to 12 kV/mm. However, aluminium nitride (AlN) combines a density of approximately 3.2 g/cm³, a very high thermal conductivity (170 to 200 W/(m·K)) and a dielectric strength of 10 kV/mm while also remaining stable up to 1,000°C. Therefore AlN ensures better thermal transfers for critical electronic circuits, while alumina is mainly used for more cost-effective applications, or applications requiring only standard electrical insulation. If thermal dissipation is a determining factor, Final Advanced Materials recommends choosing AlN.
Ceramic substrates are available in standard thicknesses from 0.15 mm to 2.0 mm, with typical dimensions ranging from 50.8×50.8 mm to 168×168 mm depending on the material. Custom dimensions can be provided to meet specific requirements. Dimensional tolerance is generally +0.2/-0.05 mm. Final Advanced Materials can also provide substrates meeting industrial requirements, with machining, drilling or etching options for direct integration into electronic devices.
Yes, alumina Al₂O₃ or alumina nitride AlN ceramic substrates can be supplied with custom laser cutting, making it possible to produce complex shapes. Laser cutting ensures a neat cut, with tolerances of ±0.05 mm and low mechanical stress. This technology is particularly suitable for thin substrates (0.25–1.0 mm) and the production of small series requiring speed and precision.
Final Advanced Materials produces laser-cut substrates based on the plans provided by the client, while preserving dimensional stability and the material's electrical and thermal properties.