90-98% Alumina

Our portfolio of 90-98% alumina materials are suitable for a variety of our ceramic products used in a range of applications. These materials include but are not limited to:

AL-500^® (94% Alumina)
A950 95% Alumina
Sintox™ FA (95% Alumina)
Sintox™ FA Ballistic (95% Alumina)
Sintox™ FA Metallising (95% Alumina)
Sintox™ FF (95% Alumina)
96% Alumina
AL-600^® (96% Alumina)
Deranox™ 970 (97% Alumina)
Deranox™ 975 (97.5% Alumina)
AL-300^® (97.6% Alumina)

AL-500^® (94% Alumina)

This 94% AL₂0₃ material has an excellent combination of mechanical, thermal, electrical and chemical properties which are well suited to applications within many industries. This material benefits from the following features:

• Dense, non-porous and vacuum tight
• High mechanical strength and hardness
• Low thermal expansion
• High volume resistivity
• Resists abrasion and chemical attack
• Consistent dielectric constant
• Readily accepts moly-manganese metallising for high temperature brazing of assemblies

The above features along with the exceptional properties of this material make this suited to a variety of applications including pressure sensors for fluid flow measurement, wear and barrier coatings for sputtering targets, electron tube and laser components, etc.

A950 (95% Alumina)

Our A950 Alumina ceramic offers significant advantages over other materials such as glass. It has a minimum Al₂O₃ content of 95%, making it a stable and reliable material that delivers benefits in a variety of settings.  This material benefits for a number of features including:

• High compressive and flexural strength
• Non porous
• Excellent hermeticity
• Dense, non-porous and vacuum tight
• High mechanical strength and hardness
• Low thermal expansion
• High volume resistivity
• Resists abrasion and chemical attack
• Consistent dielectric constant
• Readily accepts moly-manganese metallising for high temperature brazing of assemblies

Stronger and more robust than glass A950 Alumina ceramic is good for making ceramic-to-metal feedthroughs, X-ray component feedthroughs, high voltage bushings and products for implantable medical device applications.

Sintox™ FA (95% Alumina)

This refractory-quality 95% alumina material is extensively used for high temperature applications in welding, heat treatment, and metallurgical and chemical processing. This material features:

• Mechanically stable at high temperature
• Low coefficient of thermal expansion
• Good thermal shock resistance
• Totally non-combustible and non-outgassing
• Chemically inert
• Excellent electrical insulator

The above features make this material the right choice for applications such as welding nozzles, stress relieving beads, thermal insulators to protect work pieces during welding and heat treatment and special crucibles for metallurgical and chemical processes.

Sintox™ FA Ballistic (95% Alumina)

This is a lightweight hard-faced 95% (typically 96%) alumina material especially formulated for ballistic applications. This material features:

• Excellent ballistic properties
• High mechanical strength
• Can be moulded as double or single curvature monolithic tiles for ‘ergonomic’ body armour.
• Weight savings of up to 10% in comparison with traditional ballistic tile materials

This material, along with our Sintox CL (98.6%) alumina, is the best choice for military applications including ergonomic body armour for defence and security services and armour tiles for battlefield vehicles.

Sintox™ FA Metallising (95% Alumina)

This 95.0% alumina has been specially formulated for accurate grain size which is particularly valuable when a ceramic microstructure is needed to provide a good keying surface for high integrity molybdenum metallising. This material features:

• Dense, non-porous and vacuum tight
• Readily accepts molybdenum metallising for high temperature brazing of assemblies
• High volume resistivity
• Good high temperature characteristics
• Low coefficient of expansion
• Resists chemical attack
• Fire resistant and non-outgassing

These features mean this material is an excellent choice for metallised products in applications such as high vacuum equipment and scientific instruments where ceramic components need to be brazed to form high strength connections and complex assemblies, insulators for probes and sensors, transducer components, insulators for vacuum pumps, gun assemblies and connectors for  X-ray tubes and electron microscopes.

Sintox™ FF (95% Alumina)

This material is a high quality electrical insulator, with good mechanical properties, that is widely used for components in consumer products as well as for high integrity applications. Featuring:

• High volume resistivity
• Low coefficient of expansion
• Dense, non-porous and vacuum tight
• Resists abrasive wear and chemical attack
• Fire resistant and non-out gassing

This material is versatile enough to be used for products in a variety of applications such as laser power tubes, telecommunications components, aerospace components, automobile components, domestic product components, process equipment components.

96% Alumina

This also is a high purity alumina ceramic with excellent mechanical, electrical, thermal, and chemical properties, benefiting from the following features:

• Superior electrical properties
• High mechanical strength and wear resistance
• Moly-manganese metallisable
• Chemical and corrosion resistance
• Excellent dielectric properties
• Dense, non porous and vacuum tight

The features of this material make this the right choice for applications such as electrical inductors, switches, bushings, seal rings, pump seals, electronic packages, bearings and wear resistant components as well as a wide range of industrial applications that would benefit from the properties of this material.

AL-600^® (96% Alumina)

We also offer another version of our 96% alumina which is great for medical applications. This material has an excellent combination of mechanical, electrical, thermal and chemical properties and benefits from the following features:

• High mechanical strength and hardness
• Low thermal expansion across wide temperature range
• High volume resistivity
• Dense, non-porous and vacuum tight
• Consistent dielectric constant
• Resists abrasion and chemical attack

The combination of these properties and features makes this material the best choice for applications such as wear nozzles, wear guides, blood valves, electrical connector housings and general industrial applications where its range of excellent mechanical, electrical and chemical properties prove advantageous.

Deranox™ 970 (97% Alumina)

This material 97% alumina material is an excellent electrical insulator that can be metallised to facilitate high-temperature brazing of assemblies. This material features:

• Very high volume resistivity
• Low loss, constant high dielectric
• High density, non-porous and vacuum tight
• Resists abrasive wear and chemical attack

The fact that this material can be metallised makes this a good choice for many ceramic to metal or brazed assemblies such as high-vacuum systems, laser equipment (gas, solid-state and waveguide), X-ray tubes and electron microscopes, microwave windows and insulators in medical and scientific equipment.

Deranox™ 975 (97.5% Alumina)

This is a high quality, fine grain material widely used for electrical and mechanical components that require thick film metallising, as well as for dynamic applications where resistance to abrasion and chemical attack are essential. The main features of this material are:

• Can be thick film metallised with noble metal
• High volume resistivity
• High mechanical strength
• Excellent corrosion resistance
• Excellent wear resistance
• Low coefficient of friction
• High thermal stability
• High density, non-porous and vacuum tight

These features make this material an excellent choice for products in a variety of applications such as thick film metallied components, such as those with conductor and/or resistor networks, dielectric layers, solderable interfaces, etc, high-integrity devices for duties in the defence, aerospace, medical, laser and scientific instrument fields, dynamic and static components in pumps and valves that handle corrosive or abrasive media.

AL-300^® (97.6% Alumina)

This is a top quality alumina ceramic of 97.6% Al₂O₃ content, widely used for high integrity components where its exceptional electrical and thermal properties are essential to operational stability and reliability. Features of this material include:

• Exceptionally high dielectric strength
• Consistent dielectric constant
• Dense, non-porous and vacuum tight
• Readily accepts moly-manganese metallising for high temperature brazing of assemblies
• Electrically and dimensionally stable across a wide temperature range
• Resists chemical attack and abrasion
• Good thermal conductivity

The properties and features exhibited in this material ensure AL-300^® is an excellent material for manufacturing products such as laser components, electro-optical equipment, flow measurement devices, pressure sensors klystron power tubes and X-ray equipment used in defence, medical and communications markets.

We have the ability to offer tailored formulations to suit a particular requirement, so contact us today to see how we can work with you to ensure you have the right material that provides full optimisation for your product.