Alumina Crucible
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Alumina Crucibles

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Product Description

High purity Alumina crucibles (Al2O3 Crucibles) are widely used in a variety of research and industrial applications. Due to its resistance to high temperature, versatility, high abrasion (wear) resistance, high corrosion resistance, and low cost compared with other refractories and ceramic materials, these crucibles are mainly used in high temperature furnaces as ceramic crucibles.

These high temperature alumina crucibles have a high compressive strength which provides good thermal shock resistance hence widely used as a melting crucibles in furnaces. High purity alumina (Al2O3) is one the best electrical insulations at high temperatures making it an excellent choice as a thermo-dielectric refractory and is transparent to microwave radio frequencies. 

Ceramic alumina crucibles are made of high-purity alumina raw materials (95% to 99.8% alumina content) and used widely in many high-temperature applications (1000 oC to 1700 oC) for high temperature research and industrial applications.

Alumina crucibles are available in a variety of sizes, shapes such as cylindrical crucible, boat crucible, rectangle crucible etc. We can supply alumina crucibles with lid (cover) or without a lid and can also customize shape and size as per requirements.  

We are a USA company catering products and solutions in the USA, Australia, New Zealand, India, Singapore, Malaysia, South Korea, Indonesia, Dubai, Philippines and Vietnam. We are a leading supplier of scientific laboratory equipment, specializing in high-purity alumina tubes and rods available in different sizes (diameter, thickness, and length) for chemistry and science laboratory applications. Our team of experts across different platforms can discuss and customize your requirements as per your needs.

Please reach out to us at info@mkubeenterprise.com or call us at +1-732-808-1999 to discuss your projects.

Frequently Asked Questions:

What is the use of an alumina crucible?

Alumina crucibles are prized for high-temperature work in metallurgy, ceramics, chemical processing, and materials testing. Their purity and strength let you melt, calcine, or sinter samples without contamination, making them a staple in both lab and industrial furnaces.

What is the maximum temperature for an alumina crucible?

Depending on purity and wall thickness, alumina crucibles can safely handle up to 1700 °C (3092 °F). High-grade ceramic versions resist thermal shock and chemical attack, ideal for demanding refractory applications.

How are alumina crucibles made?

Fine aluminum oxide powder (Al₂O₃) is shaped—cylindrical, boat-style, rectangular tray style or other—and then sintered at very high temperatures to produce a dense, durable ceramic vessel.

What purity levels are available in alumina crucibles?

Alumina Crucibles are available in a purity range from 85% to 99.8% alumina. Typically grades of ≥99.5% are recommended for analytical or semiconductor work to minimize contamination and boost chemical resistance.

How do I clean an alumina crucible?

  • Gently remove loose debris by tapping or brushing.
  • Heat in a furnace or kiln to burn off organic residue.
  • Use non-abrasive ultrasonic baths or soft brushes for cleaning.
  • Avoid strong acids or harsh abrasives that can erode the ceramic.
  • Routine, gentle maintenance preserves integrity and ensures consistent results.

What shapes do alumina crucibles come in?

Alumina crucibles are available in various shapes to suit different applications, including cylindrical, conical, rectangular, and boat-shaped designs. These shapes are chosen based on the specific heating and material handling needs of laboratories or industrial setups.

Trusted alumina ceramic tube suppliers in the USA, such as M-Kube Enterprise, also offer custom alumina crucible shapes and sizes to meet unique requirements. With their expertise in high-temperature ceramic solutions, M-Kube Enterprise provides high-purity alumina crucibles tailored for durability and precision in demanding environments.