International Syalons

International Syalons (Newcastle) Limited is a leading manufacturer of advanced technical ceramics, primarily silicon nitride and sialon. These engineering ceramics enable us to solve wear, corrosion and thermal resistance problems in a wide range of industrial applications and markets, such as molten metal handling, oil & gas, chemical and process, automotive and aerospace.

Profile Description

Originally established in the late 1970s, the business of International Syalons is now based in the North East of England and is the UK’s leading producer of sialon and silicon nitride based advanced ceramics. Our business was the first to patent and market sialon ceramics and has nearly 40 years experience in the development of advanced nitride based ceramics. We are leading experts in the field.

In 2018 International Syalons were acquired by CALSITHERM, who are best known for their 40 years of production of outstanding calcium silicate products, for a range of applications including; internal insulation, thermal insulation, non-ferrous metal casting, fire protection, domestic fireplaces, and plant construction. Having been a family run business since 1977, CALSITHERM are the only German producers of calcium silicate, with their headquarters located in Paderborn DE, the Group also has production and sales companies under the SILCA brand name in Mettmann DE, Amsterdam NL, Scorze IT, Dowerglen ZA, Querétaro MX, and Kuala Lumpur MY, as well as strategic partners in Brazil, Denmark and USA.

Sialons are silicon nitride based advanced ceramics which are characterised particularly by outstanding wear and corrosion resistance. We manufacture five grades of sialon and silicon nitride ceramics and composites each with a unique set of properties. In addition, International Syalons also offer a range of advanced alumina, zirconia and silicon carbide ceramics which complement our sialons in many industrial wear applications.

International Syalons are committed to providing world-class fine ceramic solutions to your industrial materials requirements. Our silicon nitride and sialon ceramics offer wear, corrosion and thermal resistance and are available for example as ceramic tubes, tiles, wear liners, foundry products and many more. In addition, our R&D department, in collaboration with world-renowned Institutes and Universities, are continuing to develop new materials, nanomaterials, composites and cutting-edge fabrication processes to ensure our customers are getting the best-advanced silicon nitride ceramics available.

The Challenges of Complex Ceramic Shapes

Conventional methods for manufacturing complicated silicon nitride ceramic shapes such as spherical high-density green bodies have yielded difficult and costly results. This is primarily due to the expensive molds, extended formation periods, and poor sintering yields, which have reduced the commercial practicality of manufacturing elaborate refractory shapes.

However, thanks to the recently completed European Commission funded Horizon 2020 project ToMax, of which International Syalons were consortium members, International Syalons has invested significantly into lithographic additive manufacturing technology (L-AMT) to manufacture sialon ceramics into intricate shapes of millimeter dimensions, that are capable of meeting the advanced thermal specifications of conventionally produced material.

Successful AM of Silicon Nitride Ceramics

International Syalons has now successfully manufactured silicon nitride ceramics through AM processes, achieving near-identical thermal and high strength properties as materials produced through iso-static pressing.


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