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Dual Protection Against Thermal Shock and Corrosion — Silicon Nitride Ceramic Components Ensure Stable Production in Aluminum Casting

2025-06-16

In low-pressure die-casting and aluminum foundry operations, many customers struggle with cracking and corrosion caused by molten aluminum and thermal shock. Frequent replacement of metal riser tubes or heater protection tubes not only raises maintenance costs but also disrupts production stability.

The silicon nitride (Si₃N₄) ceramic riser tube and heater protection tube provide a long-term solution to these problems. Produced from high-purity Si₃N₄ powder and sintered above 2000 °C, these ceramic components feature high density, exceptional mechanical strength, and outstanding thermal-shock resistance. Even under rapid heating and cooling, they maintain full structural integrity and resist aluminum infiltration.

Their low thermal-expansion coefficient and excellent thermal conductivity ensure uniform temperature distribution, minimize metal oxidation, and improve energy efficiency. In continuous operation, silicon nitride riser tubes can work for thousands of hours without replacement, while heater protection tubes effectively extend the life of heating elements.

Field data show that customers using Si₃N₄ components experience up to 30 % higher production stability and cleaner molten aluminum quality.
With their high-temperature strength, corrosion resistance, and long service life, silicon nitride ceramic structural parts are becoming key materials for modern aluminum casting operations.

Wuxi Special Ceramic Electrical Co.,Ltd

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