High temperature good thermal shock resistance Cordierite mullite donuts for metal gear firing in kiln
Key Features & Benefits
✔ Ultra-Low Thermal Expansion – Cordierite’s near-zero thermal expansion coefficient prevents cracking during rapid heating/cooling cycles, ensuring dimensional stability for precision gear heat treatment.
✔ High Thermal Shock Resistance – Mullite reinforcement enhances mechanical strength at extreme temperatures, reducing breakage during repeated kiln cycling.
✔ Chemical Inertness – Resists metal oxidation reactions and slag adhesion, maintaining gear surface quality during firing.
✔ Optimized Airflow Design – Donut geometry promotes uniform heat distribution, minimizing warping in sintered metal components.
✔ Long Service Life – 3-5x longer lifespan than conventional alumina setters under cyclic thermal loads.
Technical Specifications
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Max Operating Temp: 1400°C (2552°F)
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Thermal Expansion: 1.5–2.0 x10⁻⁶/°C (25–1000°C)
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Porosity: <15% (dense structure for load-bearing applications)
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Standard Sizes: OD 50–300mm (custom diameters available)
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Load Capacity: Up to 15kg per donut (stackable for batch processing)
Ideal Applications
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Precision gear sintering (automotive/industrial transmission components)
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Debinding & sintering of MIM (Metal Injection Molded) parts
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High-temperature brazing fixtures
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Heat treatment of alloy gears/shafts
Why Choose Our Donuts?
Our proprietary cordierite-mullite composite formulation achieves the perfect balance between thermal shock resistance and mechanical durability. Unlike pure cordierite (prone to creep at >1200°C) or standard mullite (brittle under thermal cycling), our hybrid material delivers reliable performance in oxidizing/reducing atmospheres while withstanding daily kiln cycling.
Custom solutions available – Tailored dimensions, grooved surfaces for gear alignment, or reinforced edges for heavy-load applications.
Request samples or datasheets today to optimize your metal gear firing process with industry-leading ceramic setters!