Share this page by mail Sintered Ceramic: Alumina
Overview : Sintered Aluminium Oxide
Final Advanced Materials manufactures ceramic parts with precision. From the blanks obtained by moulding or extrusion, we get these shaped parts by diamond machining for dense ceramics.
We provide the definition and machining of prototypes, as well as the individual production in small and large series. We design and machine the ceramic components adapted to specific customer applications.
We only work with calibrated and qualified ceramics of high purity. The ceramic parts that we transform, reproduce without modification, the physical characteristics of the blanks before machining, without any variation or mechanical depreciation.
The intrinsic properties to ceramics, i.e. hardness, abrasion resistance, compressive strength, resistance to high temperatures, to thermal shocks, high dielectric strength, all these qualities are preserved and reproduced on the finished parts.
Aluminium oxide is a technical ceramic oxide of primary importance, as it is suitable for a wide variety of applications. It is characterized by a high degree of hardness and thermal stability. It also shows exceptionally good resistance to high temperatures and abrasion.
Applications of Sintered Aluminium oxide
- Production of customized components
- Flame tubes
- Heat exchangers
- Firing trays
- Protection of electrical circuits
- Substrates
- Medical prostheses
- Sealing gaskets
- Ceramic machining tools
- Wire guides
- Mechanical components
Benefits of Sintered Aluminium Oxide
- Hardness
- High mechanical resistance
- Dimensional stability, even at high temperatures
- Resistance to wear and corrosion
- Electrically insulating
- Resistance to chemical products
- High-temperature withstand
Technical Data of Sintered Aluminium Oxide
A comparative table for the available Sintered Aluminium oxide 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
96% sintered alumina's density is 3.7 g/cm³, its hardness 14 GPa and its flexural strength 200 MPa, with a thermal working limit of approximately 1,500°C. 99.7% alumina is purer, its density reaches 3.9 g/cm³, its hardness 17 GPa and its flexural strength over 370 MPa. The presence of pores and impurities in 96% alumina reduces its wear resistance and corrosion resistance. In the case of challenging applications, 99.7% alumina provides greater performance, better chemical resistance and a longer lifetime. Final Advanced Materials recommends 99.7% alumina for essential parts and 96% alumina for less severe applications.
Sintered alumina (Al₂O₃, density of 3.9 g/cm³, hardness of 17 GPa) is extremely resistant to wear but sensitive to mechanical impacts, with a fracture toughness of approximately 4 MPa·m1/2. Yttria-stabilised zirconia (ZrO₂-Y2O3, density of 6 g/cm³, hardness of 12 GPa) has a higher fracture toughness, of approximately 7 MPa·m1/2, making it ideal for parts which are subject to impacts. Alumina is preferred for its chemical resistance and its abrasion resistance, while zirconia will be more suited to applications requiring very high impact resistance and high durability, such as implants or cutting tools. Final Advanced Materials recommends taking into consideration requirements of hardness and resistance to mechanical stresses to achieve an effective balance and choose the most suited material.