Sialon Ceramics

Sialon Ceramics

For the molten aluminium Industry since 1986

SiAlON ceramics are a specialist class of high-temperature refractory materials, with high strength at ambient and high temperatures, good thermal shock resistance and exceptional resistance to wetting or corrosion by molten non-ferrous metals, compared to other refractory materials such as, for example, alumina. A typical use is with handling of molten aluminium. They also are exceptionally corrosion resistant and hence are also used in the chemical industry. SiAlONs also have high wear resistance, low thermal expansion and good oxidation resistance up to above ~1000 °C.

Since 1986, we have been producing high quality Sialon products from different grades to the molten aluminium, zinc and other non-ferrous industries. 

Silicon Nitride, syalon or Sialon are beta ceramics which are sintered under high temperatures at 1,800 degrees celsius and can be made in almost any shape.

As Sialon ceramics contain approximately 40% of Aluminium Oxide, they have excellent non-wetting properties when in contact with molten aluminium.

Commercial Sialon was introduced by our company in 1986 to replace ceramic coated cast iron thermocouple protection tubes

The Sialon shop is a new online shop where you can get your free online request for quotation for Heater TubesImmersion HeatersThermocouple Protection TubesFluxing PipeRotors and Stators, please visit our shop! 

30 years experience

Renowned professionals with more than 30 years’ experience spent operating with the molten aluminium industry.

Highest impact fracture toughness

The Sialon ceramic material produced by us has a strength of over 1100 MPa and a fracture toughness of over 9 MPa.m ½.

Ultrasonic degassing

Please visit our new website,, dedicated to ultrasonic degassing in olten etals up to 1,800°C, ultrasonic grain refinement and micro-alloying.

We speak your language!

We work with customers throughout the world and are able to converse with them in English, Dutch, German and French.

Leading global supplier

New generation of silicon nitride based advanced ceramics, it is the first of the Si–Al–O–N family developed by us

Free24/7 Support

Our dedicated team is available to take your questions by chat, email or Toll-free telephone, 7 days per week in any timezone.

What We Offer

Sialon Technical ceramics

Sialon Technical ceramics for use in molten aluminium such as heater tubes, thermocouple protection tubes, riser tubes, Westofen dosing tubes, ladles, hooks, extrusion dies, cutting tools and welding pins.

Ultrasonic degassing of molten aluminium

Ultrasonic treatment of metal melts can substantially improve the properties of castings, in particular, their microstructure and mechanical properties. New refinements to the technique using proprietary

Ultrasonic Micro-alloying

Since the turn of the twentieth many alternative aluminium alloys have been developed and used in various applications including, aerospace, automotive, and marine. The abundance, low weight, and versatility of aluminium ..

Watch our ultrasonic degassing video

Short video about ultrasonic degassing and grain refinement of molten aluminium on an industrial scale.

How Are Sialon Ceramics Manufactured?

Sialon ceramics are manufactured by combining a mixture of raw materials including silicon nitride, alumina, aluminium nitride and silica. along with the oxide of a rare earth element, such as yttrium. At times, the silicon is replaced by aluminium with the corresponding atomic replacement of nitrogen by oxygen; this is done in order to satisfy valency requirements. The resulting 'solution' has superior properties, both to the original pure solvent, syalon and to silicon nitride or Si3N4.

Other Applications

Other applications include use in the chemical, process, oil and gas industries due to the excellent chemical stability, corrosion and wear resistance properties. In metal forming, Sialon ceramics are used as cutting tools for machining chill cast iron and to braze and weld fixtures and pins, particularly for resistance welding.

Smooth Finish of Products

Our heater tubes, thermocouple protection tubes, riser tubes, Westofen dosing tubes, ladles, hooks, extrusion dies, cutting tools and welding pins have excellent non-wetting properties and a smooth surface.

© 2019
With integrated thermocouple

Sialon Immersion Heaters with 12 months warranty against electrical defects

in molten aluminium