• Technical Ceramics for the molten non-ferrous industry since 1986 | Global shipping to 37 countries.
  • Göteborg, Sweden
  • +(46) 31 754 0790
  • Copenhagen, Denmark
  • +(45) 35 15 8085
  • Tollfree USA/Canada
  • + 1 (833) 709-1399

Aluminium Immersion Heater

Direct heating in molten metals up to 850° C

12 months warranty against chemical attack and electrical defects in molten aluminium
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Sialon ULTRA™ Custom Made Products

With threading, +/- 0.02 mm tolerances

12 months warranty against chemical attack in molten aluminium
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Sialon ULTRA™ Heater Tubes

30% longer service life!

12 months warranty against chemical attack in molten aluminium
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Sialon ULTRA™ Riser Tubes

For low-pressure diecasting machines

12 months warranty against chemical attack in molten aluminium
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Sialon ULTRA™ Thermocouple Protection Tubes

30% improved impact fracture toughness | Up to 1,600 mm

12 months warranty against chemical attack in molten aluminium
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XICAR™ Sintered Silicon Carbide

Custom made products up to 3,000 mm | 118 Inch

Equivalent or superior performance than HEXOLOY™ - Maximum temperature up to 1,900 degrees C.
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XICRU™ Foundry Crucibles

30% longer service life!

We manufacture the biggest crucibles in the world with a maximum width of 1.5 meters!
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Welcome to Sialon Ceramics since 1986

Custom made Sialon and Sintered Silicon Carbide Products

Sialon is a silicon nitride based ceramic material with excellent thermal and mechanical properties for high performance industrial applications.

Sialon Ceramics Denmark ApS develops and manufactures innovative ceramic materials, including Sialon ceramics, sintered silicon carbide (SIC) ceramic and our proprietary sialon aluminium immersion heater.

Sialon ceramics and silicon carbide ceramic (SIC) are key in industries with extreme conditions such as metallurgy and aerospace. The corrosion and thermal shock resistance of our aluminium immersion heater ceramics ensures durability and stability in harsh operating environments, enhancing its value in today’s industrial applications.

What is Sialon?

Sialon is a high performance ceramic made from silicon (Si), aluminium (Al), oxygen (O) and nitrogen (N). We use aluminium atoms to partially replace silicon and nitrogen atoms to replace oxygen in the silicon nitride lattice. An alloyed structure promotes thermal stability, hardness and chemical inertness. With a Young’s modulus of 345 GPa and a hardness of over 17 GPa, our Sialon ceramics can withstand temperatures up to 1400°C. They are also wear resistant and have low coefficients of thermal expansion for harsh environments.

Sialon ceramics and SIC ceramic in high-tech manufacturing.

Sialon | Sialon Properties | SIC Ceramic | Silicon Carbide Ceramic | Sialon CeramicSialon and Sialon SIC ceramic are used in high-tech manufacturing for their mechanical/thermal properties. High temperature and corrosion resistant industries use our Sialon ceramic components, including metal forming and molten metal handling. Sialon is suitable for semiconductor manufacturing due to its electrical insulation properties. Its low wetting properties against molten metals and non-ferrous alloys increase its usefulness in foundry and die-casting applications. So Sialon’s combination of properties goes where standard materials fail. This underlines our commitment to materials science innovation.

Benefits of Sialon ceramics 
  • Our Sialon ceramics maintain mechanical strength and stiffness at temperatures up to 1750°C.
  • Our materials offer high wear resistance for harsh conditions where typical ceramics fail.
  • With a low coefficient of thermal expansion of approximately 3.0 x 10^-6 K^-1, our ceramics offer thermal shock resistance for rapid temperature changes without damage.
  • In addition, our Sialon ceramics are ideal for chemical processing applications because they resist corrosion from most acids and alkalis.
  • Our products offer high hardness (17 GPa) for cutting tools and machining components.
  • Importantly, our ceramics have exceptional electrical insulation properties with a dielectric strength of around 212 ac V/mil for electrical and electronic applications.
  • The non-wetting properties with non-ferrous metals are suitable for molten metal handling equipment.
  • In addition, our Sialon materials are lightweight and durable, providing benefits in areas such as aerospace and automotive where weight reduction is a priority.
  • Our bioinert Sialon ceramics are suitable for medical implants and prostheses.
  • Finally, our ceramics are ideal for space exploration and superconducting applications due to their ability to operate in cryogenic conditions.
Manufacturing process of Sialon Ceramics and sintered silicon carbide.

Sialon Ceramics Denmark ApS adds sintered silicon carbide (SIC) to our ceramic matrix backbone for improved mechanical and thermal properties.

For homogeneity, we carefully combine silicon carbide powder with other ceramic materials. Compacting this combination under high pressure creates a green body, the precursor to sintered silicon carbide. We use novel approaches, including cold isostatic pressing, to achieve uniform component density for precise sintering.

Importance of the sintering process in Sialon ceramics and silicon carbide ceramic

Sintering transforms the green body into a fully densified ceramic. Sintering at around 1800°C in a controlled environment allows silicon atoms to diffuse into the ceramic lattice.

The process binds the silicon carbide particles and strengthens the grain boundaries and fracture toughness. We control the sintering time and temperature to achieve a fine-grained microstructure. This is necessary for the high wear resistance and thermal conductivity of sintered silicon carbide.

Key applications for Sialon ceramics

    • Thermocouple protection tubes.
    • Aluminium die cast components. for high speed machining.
    • Molten metal handling: nozzles, rotors and impellers.
    • Aluminium immersion heater.
    • Wear resistant coatings for automotive and aerospace components.
    • High temperature furnace components: supports, tubes.
    • Corrosion resistant liners in the chemical processing industry.
    • Electrical insulators in semiconductor manufacturing.
    • Turbine blades in high performance engines.
    • Biomedical devices: bone substitutes, prosthetic applications.
    • Sialon discs for shot-blasting.

Sialon | Sialon Properties | SIC Ceramic | Silicon Carbide Ceramic | Sialon Ceramic | sialon aluminium immersion heater

Sialon ceramics integrated in our aluminium immersion heater

We use the the properties of Sialon ceramics in demanding applications such as aluminium immersion heaters.

Sialon ceramics are suitable for aluminium immersion heaters due to their corrosion resistance and thermal conductivity.

Such heaters are required for accurate temperature control and heat resistance, and perform better in difficult environments. The low wetting properties of Sialon limit aluminium adhesion, while maintaining availability and maintenance costs.

We continue to innovate the capabilities and applications of aluminium immersion heaters for global industrial needs.
Learn more or discuss your unique requirements with us.

Sialon & Sintered Silicon Carbide products and services.

Sialon ULTRA™ Premium
Products

We manufacture and distribute high quality Sialon Ceramics and Sintered Silicon carbide products such as thermocouple protection tubes, riser tubes, heater tubes, and custom made products.

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XICAR™ Sintered Silicon Carbide products

A new class of high performance sintered silicon carbide products for environments up to 1900° Celsius or 3452° Fahrenheit.

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Sialon Immersion Heaters for molten non-ferous up to 850° Celsius

Long life, high efficiency (99.5%), Sialon immersion heaters for use in molten aluminium and zinc. Our immersion heaters have a standard 12 months warranty against electrical defects.

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Unique Request for Quotation online webshop

Time is precious nowadays. We have developed a fast, interactive Request for Quotation system where you can add all products you are interested in. We will submit the quotation within three working days

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Customer Portal to follow all transactions with us!

To keep a 360 degrees view over all your transactions with us, we developed a brand new Customer Portal to view all quotations we submitted, to view invoices and much more.

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Ask for an online meeting to discuss your application with us!

In this unpersonal world of emails, we offer video meetings to discuss sialon & sintered silicon carbide applications. With an experienced team, we can find together solutions to create your sustainable products.

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Why Choose Us?

sialon used in foundry

39 years experience

Renowned professionals with more than 30 years’ experience spent operating with the molten non-ferrous industry.

Free 24/7 Support

We offer video, telephone, chat and in-factory support for our global customers.

 

Trusted by 200+ Clients

We have built-up excellent business relations with all major non-ferrous companies in the world. They rely on our expertise and professionalism.

Reasonable delivery times

If we have tooling for your special product, we usally deliver within 4 weeks

Available 24/7

Sialon Ceramics in a nutshell

Go to shop

240 +

Happy Customers

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Export to countries worldwide

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Years in Business

47 +

Standard products

Quality environmental system ISO 14001
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Technical Ceramics since 1986

Sialon Products

XICAR™ Sintered Silicon Carbide

Call Us!

Sweden / Sverige

+(46) 31 754 0790

Denmark

+(45) 35 15 8085

USA/Canada Tollfree

+ 1 (833) 709-1399

©2025 All Rights Reserved. Sialon Ceramics Denmark ApS

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* Complicated shapes in Sialon ULTRA™ and XICAR™ Sintered Silicon Carbide. * Aluminum Immersion Heaters * Ultrasonic degassing & grain refinement
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