Corundum-Mullite Crucible High Temperature Resistant for Industrial Use

Why Choose Gotrays Corundum-Mullite Crucibles for Your High-Heat Applications

When your process demands exceptional durability and stability at extreme temperatures, Gotrays Corundum-Mullite Crucibles deliver unmatched performance. Crafted from a carefully balanced composition of fused mullite and tabular corundum, these crucibles offer superior thermal and mechanical stability. Mullite provides excellent resistance to thermal shock and chemical corrosion, while tabular corundum contributes hardness and high-temperature strength — together creating a robust vessel that withstands the toughest conditions.

What sets Gotrays apart is our proprietary sintering technology, a unique edge that ensures a denser microstructure and longer lifespan than conventional crucibles. This advanced process reduces porosity, enhancing resistance to cracking and wear during rapid thermal cycling.

By choosing Gotrays, you’re investing in more than just a crucible—you’re securing a quick return on investment through minimized downtime and extended service intervals. For industries where continuous, high-heat processing is critical, Gotrays Corundum-Mullite Crucibles provide the reliable, cost-effective solution you need.

Key Features and Superior Performance Benefits

Gotrays Corundum-Mullite Crucibles stand out thanks to their top-notch thermal shock resistance. They handle rapid temperature changes up to 1500°C without cracking, making them perfect for demanding high-heat cycles. Made with high purity materials, these crucibles won’t contaminate your samples, whether you’re working with acidic or alkaline melts.

They also have a low thermal expansion rate, which keeps their shape steady even under intense heat — no warping or shrinkage. These crucibles resist corrosion and slag buildup, especially useful in metallurgy and metal melting applications. Their high thermal conductivity ensures heat spreads evenly, so your materials heat consistently every time.

Plus, Gotrays designs these crucibles using an eco-friendly, low-energy firing process, helping reduce environmental impact without sacrificing quality or performance.

Technical Specifications and Material Properties

Our Gotrays Corundum-Mullite Crucibles are made from a blend of 70-80% aluminum oxide (Al2O3) and 20-30% silicon dioxide (SiO2) mullite, all with over 95% purity. This mix offers excellent durability and performance in high-heat environments.

• Maximum service temperature: Up to 1750°C, tested safely up to 1800°C
• Density: Between 2.5 and 3.0 g/cm³, averaging 2.8 for consistent strength
• Thermal expansion: Less than 2.5 x 10⁻⁶ per °C, designed to minimize stress during rapid temperature changes
• Dimensions:
  • Cylindrical sizes from 50 mm up to 200 mm diameter
  • Custom conical shapes available
  • Standard stock size 102 x 102 x 45 mm
• Capacity: Ranges from small 50 ml pots to large 5-liter containers, scalable depending on your needs
• Certifications: ISO 9001 certified and REACH compliant, with full material traceability to meet strict quality standards

These specs ensure our alumina-mullite crucibles deliver reliable, consistent performance whether you need them for industrial metal melting, lithium battery sintering, or ceramic powder calcination.

Versatile Applications in Demanding Industries

Our Corundum-Mullite Crucibles are built tough for a wide range of heavy-duty uses across different industries. Here’s where they really shine:

• Metallurgy: Perfect for melting steel, pigments, and frits thanks to excellent corrosion and slag resistance.
• Battery and Electronics: Ideal for baking lithium cobalt oxide powders and phosphor calcination, supporting high-purity and stable processing.
• Ceramics and Labs: Reliable for advanced ceramics synthesis and sample analysis with no contamination risks.
• Other Applications: Great for medium-frequency furnaces, rare earth element processing, and any industry requiring high-temp durability.

If your work demands consistent performance under extreme conditions, these mullite-corundum crucibles have you covered.

Gotrays Quality From Raw Materials to Final Sintering

At Gotrays, quality starts with raw materials. We use electrofused mullite and high-purity alumina, carefully batched to maximize performance. Our unique self-flow casting method ensures even material distribution before firing the crucibles at temperatures above 1600°C for superior strength and durability.

Every batch goes through strict quality checks, including porosity and strength testing. We back this with a 12-month defect warranty, so you can trust the reliability of your Gotrays Corundum-Mullite Crucibles. For bulk orders, we also provide detailed thermal cycling reports to guarantee consistent performance.

We take sustainability seriously. Our manufacturing process uses recyclable materials and consumes less energy compared to many competitors. That means you get a top-performing, eco-friendly crucible without compromising on quality.

Available Sizes Pricing and Easy Customization

Our Gotrays Corundum-Mullite Crucibles come in a range of sizes to fit your needs. Standard stock sizes start at 102 by 102 by 45 millimeters, but we also offer custom shapes and capacities—from small 50 milliliter pots up to 5 liters. Whether you need a specific dimension or volume, we can tailor your crucible with quick turnaround times.

Pricing is straightforward and budget-friendly:

• Single-unit pricing for small orders
• Bulk discounts available for larger quantities
• Custom quotes for unique specs or bulk needs

Want to simplify your setup? We also offer bundled options that include lids and corundum saggers for better protection and performance.

Get your instant quote today and see how easy it is to get a high-quality, thermal shock resistant crucible customized for your high-heat applications.

What Our Customers Say Real-World Reliability

Our Corundum-Mullite Crucibles have earned praise from users across the U.S. for boosting performance and cutting down rejection rates in tough, high-heat processes. Customers in metallurgy, ceramics, and battery manufacturing report smoother operations and fewer cracks or failures during thermal cycling.

Here’s what they’re saying:

• “Improved our melt quality and reduced downtime by over 20%.”
• “No more frequent replacements—these crucibles last longer under extreme conditions.”
• “Perfect for lithium battery powder sintering; contamination issues are gone.”

We keep an eye on aggregate star ratings so you get a clear picture of reliability and durability before buying. Check out full reviews on our site to see real feedback from industry pros who trust Gotrays for their critical heating tasks.

Frequently Asked Questions

How does a corundum-mullite crucible compare to a quartz crucible?

Corundum-mullite crucibles handle much higher temperatures—up to 1750°C—while quartz crucibles usually max out around 1200°C. They also resist thermal shock better, meaning they won’t crack or break during rapid heating and cooling cycles. If you need durability and reliability for tough, high-heat jobs, corundum-mullite is the way to go.

What shipping options are available?

We offer nationwide shipping across the U.S. with typical delivery times of 3-7 business days. For bulk or custom orders, timelines may extend depending on size and complexity. International shipping is available too, with clear customs documents and tracking. Reach out for specific regional details or expedited shipping options.

Explore Related Gotrays Refractory Solutions

At Gotrays, we don’t just offer corundum-mullite crucibles. Our lineup also includes cordierite mullite crucibles, alumina saggers, and zirconia boats—all designed to meet the demanding needs of high-temperature industries across the U.S.

Whether you’re working in metallurgy, battery production, or advanced ceramics, our range supports your process with reliable, high-purity materials that withstand tough thermal cycles and corrosive environments.

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