Product Description
XICRU™ NF Series (Black) SiC-Graphite Crucibles for Aluminium & Zinc Alloy Smelting – Anti-Oxidation Coating + Extra Firing, 620–920°C, Ø1525 mm Max
XICRU™ NF Series Crucibles are premium isostatic-pressed SiC-graphite matrix crucibles specially engineered for aluminium, aluminium alloys and zinc alloy smelting. The NF Series (Black) receives an initial anti-oxidation coating followed by an additional firing process that significantly enhances durability, thermal stability and resistance to low-temperature oxidation over long operating cycles.
The iron-free composition completely prevents metal contamination in high-purity aluminium melts. Excellent thermal conductivity (thanks to the SiC-infused matrix) reduces heat-up times and energy consumption, while the low thermal expansion coefficient (4.1×10⁻⁶/°C) eliminates microfractures and thermal stress cracking. The low-wettability surface minimises slag adherence, making cleaning easy and reducing downtime between melts.
These crucibles perform exceptionally well in coke-fired and gas-fired furnaces and are ideal for Striko Westomat dosing systems and high-purity casting lines. Maximum dimensions: Ø1525 mm × height 1050 mm – among the largest available.
Key advantages:
- Tolerates severe temperatures without structural deformation
- Maintains full strength over extended cycles
- Improved energy efficiency and faster melting
- Minimal maintenance and longest service life
Since 1986, Sialon Ceramics has supplied these NF Series crucibles worldwide with the best price/performance ratio. They integrate perfectly with Sialon ULTRA™ and other XICRU™ products. View XICRU™ NF Series Crucibles – custom shapes, sizes and lids available on request. Standard 12-month warranty against chemical attack in molten aluminium baths.
XICRU™ Crucibles are premium isostatic-pressed crucibles for high-temperature melting of aluminium, zinc, copper, gold, zinc oxide distillation and more. All models are available in very large sizes (up to Ø1525 mm) and come with our standard 12-month warranty.
Available XICRU™ Crucible Series
- XICRU™ HT Series Crucibles (Gray) – High-temperature series with anti-oxidation coating for zinc oxide distillation and copper/gold/silver melting (900–1400 °C).
- XICRU™ NF Series Crucibles (Black) – Extra-fired anti-oxidation coating for aluminium & zinc alloy smelting (620–920 °C), longest service life in coke/gas-fired furnaces.
- XICRU™ Resistance Furnace Crucibles – Optimized for Striko Westomat and resistance furnaces, excellent thermal efficiency at 620–920 °C.
- XICRU™ Induction Furnace Crucibles – Specially designed for electromagnetic induction melting of aluminium, copper, gold & rare metals (620–1400 °C).
- SSiC Sintered Silicon Carbide Crucibles – General-purpose high-temperature crucibles up to 1900 °C in controlled atmosphere.
Custom shapes, sizes and lids are available on request. Fast quotation – usually within 24 hours.



