Kiln Furniture Corundum-Mullite Sagger Product Overview
Welcome to the ultimate solution for high-temperature kiln firing: our Corundum-Mullite Sagger. Designed for industrial sintering and ceramic powder firing, this kiln furniture offers unbeatable thermal shock resistance and long-lasting durability. Whether you’re working with magnetic materials, battery components, or advanced powders, our alumina corundum sagger tray guarantees precise protection and consistent performance at extreme temperatures.
Explore our eye-catching image gallery to see the rugged design and precision craftsmanship that sets our high-purity corundum-mullite refractory sagger apart. Ready to upgrade your kiln process? Contact us today to discover how our kiln firing sagger can improve your production efficiency and product quality.
Key Features and Benefits
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High Thermal Shock Resistance
Designed to handle rapid temperature changes without cracking, ensuring durability during fast firing cycles.
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Durable Corundum-Mullite Blend
Combines the strength of corundum with the stability of mullite for long-lasting kiln furniture.
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Excellent Chemical Stability
Resistant to corrosion and contamination, keeping your fired products pure and defect-free.
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Uniform Heat Distribution
Helps maintain consistent temperatures across your kiln loads for even sintering and firing.
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Lightweight Yet Strong
Easier handling and installation without sacrificing mechanical strength.
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Optimized for Powder Calcination and Magnetic Material Firing
Perfect for industries like battery manufacturing, ceramics, and advanced materials.
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Customizable Shapes and Sizes
Fits a wide range of kiln configurations and specific operational needs.
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Low Porosity Surface
Minimizes powder sticking and contamination, reducing cleaning time and waste.
These features make our corundum mullite refractory saggers a reliable choice for American manufacturers seeking efficient, high-quality kiln solutions.
Technical Specifications
Our Corundum-Mullite Sagger is built to deliver consistent performance under high temperatures and tough conditions. Here’s a quick look at its key technical specs:
| Property | Value | Testing Standard |
|---|---|---|
| Composition | 70% Corundum, 30% Mullite | ASTM C327-16 |
| Maximum Operating Temp | 1800°F (982°C) | ASTM C611-22 |
| Thermal Shock Resistance | High | ASTM C149-20 |
| Density | 3.8 g/cm³ | ASTM C373-18 |
| Porosity | < 10% | ASTM C20-00 |
| Flexural Strength | 50 MPa | ASTM C1161-18 |
| Chemical Stability | Excellent | Internal Lab Tests |
| Dimensional Stability | < 0.1% Shrinkage after firing | ASTM C704-18 |
These specifications make our kiln furniture ideal for demanding applications where thermal shock resistance and chemical stability are a must. Tested to strict ASTM standards, this alumina corundum sagger tray ensures reliability in powder calcination, sintering, and ceramic firing processes common in the U.S. industrial sector.
Applications
Our Corundum-Mullite Sagger is built to handle tough high-temp jobs across different industries. Here’s where it shines:
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Powder Calcination
Perfect for firing ceramic powders evenly without contamination, making it ideal for advanced materials processing.
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Magnetic Materials Firing
Supports high-temperature sintering of magnetic components, ensuring stable properties and consistent quality.
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Battery Component Production
Reliable for firing battery ceramics and electrodes with excellent thermal shock resistance and purity.
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Industrial Sintering
Used widely in sintering ceramic, metal, and composite parts where durability and chemical stability matter.
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Ceramic Powder Firing Crucible Substitute
Functions effectively as a furnace container for fragile powders needing controlled atmosphere firing.
Each use benefits from the high-purity corundum mullite blend, which offers superior thermal stability and low contamination risk compared to alternatives like cordierite-mullite saggers. This makes it a go-to option for US manufacturers focused on quality and efficiency.
Manufacturing Process
Our corundum-mullite sagger goes through a precise manufacturing process to ensure top quality and performance for your kiln needs. Here’s how we make it:
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Raw Material Blending
We start by carefully mixing high-purity corundum and mullite powders. This blend guarantees excellent thermal shock resistance and strength during high-temperature firing.
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Forming
The blended material is then shaped into saggers using advanced molding techniques. This ensures consistent thickness and durability to handle tough industrial environments.
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Firing
Next, the formed saggers are fired in controlled kilns at extremely high temperatures. This step densifies the ceramic, improving its mechanical stability and lifespan.
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Quality Control
Each sagger undergoes strict quality testing, including dimensional checks, thermal shock resistance, and purity inspections. Only the best pieces make it to your kiln.
Our industrial sintering sagger box process is designed to deliver reliable kiln furniture that holds up in powder calcination, battery component firing, and magnetic material processing.
Why Choose This Product

When it comes to kiln furniture, the Corundum-Mullite Sagger stands out for its durability, thermal resistance, and reliability. Compared to other materials like cordierite-mullite or standard alumina trays, this sagger offers higher thermal shock resistance and improved lifespan, making it ideal for tough industrial environments.
Comparison Table
| Feature | Corundum-Mullite Sagger | Cordierite-Mullite Alternative | Standard Alumina Sagger |
|---|---|---|---|
| Thermal Shock Resistance | Excellent | Good | Moderate |
| Max Operating Temperature | Up to 1700°C (3092°F) | Up to 1450°C (2642°F) | Up to 1600°C (2912°F) |
| Chemical Stability | High | Moderate | Moderate |
| Lifespan | Long | Medium | Short |
| Contamination Risk | Low | Medium | High |
| Price | Mid to High | Lower | Low |
What Our Customers Say
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“Switching to the Corundum-Mullite sagger trimmed our downtime by 25%. It’s tough against thermal shock and contamination.” — Midwest Battery Manufacturer
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“The improved lifespan over our old alumina trays saved us money in the long run and reduced firing inconsistencies.” — Powder Calcination Facility in Texas
This product’s superior performance makes it a trusted choice for industries that need durable and reliable kiln furniture, especially for firing magnetic materials, battery components, and high-purity ceramics right here in the U.S.
Customization Options
We understand every kiln setup is different. That’s why our Corundum-Mullite Sagger comes with flexible customization options to fit your exact needs.
- Shapes: Choose from trays, boxes, or custom forms to suit your kiln space and firing process.
- Coatings: Opt for specialized coatings that improve thermal shock resistance or reduce contamination risk.
- Volumes: Select from a range of sizes or request a specific volume for your batch requirements.
If you don’t see exactly what you need, just reach out. Our team is ready to design custom kiln furniture tailored to your firing demands and workflow. Get in touch for a personalized solution that helps you get the most from your kiln.
Pricing and Availability

We offer competitive tiered pricing for our Corundum-Mullite Sagger to fit projects of all sizes. Whether you need a small batch or large volume, you’ll get fair rates based on your order quantity.
Pricing tiers
Small orders: ideal for testing and samples
Medium orders: perfect for steady manufacturing runs
Large orders: best for high-volume industrial use
Lead times
Standard orders ship within 2 to 3 weeks
Rush orders available upon request for faster turnaround
Sample availability
We provide sample saggers so you can test them in your kiln furniture setup before committing to larger orders. This helps you confirm compatibility and performance for your specific process.
Contact us to get a custom quote or ask about current inventory and delivery schedules. We’re here to help keep your production on track with reliable, high-purity corundum mullite refractory saggers ready when you need them.
FAQs
How long does the corundum-mullite kiln furniture last?
Our kiln saggers are built to handle high temperatures and thermal shocks, giving them a long service life in typical industrial kiln environments. With proper care and operation, expect several years of reliable use.
Will the sagger cause contamination during firing?
No. Made from high-purity corundum and mullite, these refractory saggers minimize contamination risks, keeping your ceramic powder, battery components, or magnetic materials clean and pure.
Can the sagger handle rapid temperature changes?
Yes. The thermal shock resistant design ensures stable performance during quick heating and cooling cycles without cracking or warping.
What makes this product better than cordierite-mullite alternatives?
Our high-purity corundum-mullite saggers offer superior durability, increased temperature limits, and improved chemical resistance to suit demanding U.S. industrial sintering needs.
Are custom sizes and shapes available?
Absolutely. We provide custom kiln furniture options tailored to your specific kiln design and production requirements.
How do I clean and maintain the saggers?
Simply remove residue after each firing cycle using non-abrasive tools and avoid sudden temperature shocks to prolong lifespan.
If you have more questions about using our kiln furniture corundum-mullite saggers, feel free to contact us anytime.
Get Your Corundum Mullite Kiln Furniture Today
Ready to improve your kiln firing process with our high-quality Corundum-Mullite Sagger? Download the full spec sheet now to see all the details and technical data in one place.
Explore our related products carousel to find other top-notch mullite ceramic kiln furniture and alumina corundum sagger trays tailored for your industry needs.
Have questions or need a custom solution? Use our easy contact form to reach our team. We’re here to help you find the best kiln furniture for your application.
All our kiln saggers come with certification proofs ensuring they meet industry standards for durability and thermal shock resistance, so you can trust their performance in your high-temperature kiln operations.






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