Boron Nitride Crucible

Product Description

General Information

Boron nitride is created artificially by reacting boric acid or boron oxide with nitrogen. It is present in different crystalline arrangements, two of the most common types being –

• hexagonal boron nitride (h-BN), similar to the structure of graphite
• cubic boron nitride (c-BN), similar to the structure of diamond

Boron nitrides are made up of chemical substances that are equal parts nitrogen and boron. It is an advanced ceramic material. Owing to its crystalline forms mentioned above, it is called white graphene or inorganic graphite. Boron Nitride is a relatively soft material and can be modified into different shapes like rods, plates, and crucibles and forms such as powder, aerosol, etc.

Boron Nitride Crucibles are used for a variety of applications like casting metals, or as insulators because of their physical and chemical properties, some of them being thermal shock resistance, non-toxicity, thermal conductivity, able to withstand high temperatures.

Boron Nitride Crucibles are relatively softer than other refractory materials, therefore they need to be handled delicately, with care to avoid causing any damage to the product and is necessary to maintain its quality.

We are a USA company catering products and solutions in the USA, Australia, New Zealand, India, Singapore, Malaysia, South Korea, Indonesia, Dubai, the Philippines, and Vietnam. 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.

Key Features

Boron Nitride crucibles can be used at high temperatures in an inert atmosphere, it also possesses significant properties such as high resistance to corrosion and electricity. Other properties include: –

• High melting point (2973 °C)
• Low wettability to molten metal
• High thermal conductivity
• Low thermal expansion
• Relatively high thermal shock resistance
• Extremely high working temperature with proper inert gas protection (>3000 °C has been recorded).
• High purity
• Chemical inertness

Applications

Boron Nitride Crucible’s high resistance to high temperature make it a versatile vessel for numerous applications, such as: –

• High-temperature furnace insulators
• Vacuum system electric insulators
• Glass melting crucible
• Crucibles for crystal growth
• Crucible break rings for casting machine
• Parts for ion injection equipment
• Being used in the automotive industry

Frequently Asked Questions:

What is a Boron Nitride Crucible?

A boron nitride (BN) crucible is a high-performance ceramic vessel made from hexagonal boron nitride. It is valued for its excellent thermal stability, chemical inertness, and non-wetting surface, making it ideal for maintaining material purity under high-temperature conditions. These crucibles are commonly used in demanding laboratory and industrial applications.

Can BN crucibles be used with molten metals?

Yes, Boron nitride crucibles resist wetting by metals such as aluminum, magnesium, zinc, and even precious metals. Their non-adhesive surface makes metal removal straightforward and prevents corrosion or erosion, which is why BN crucibles are often specified for metal casting applications.

What sizes are available for BN crucibles?

BN crucibles come in a range of standard and custom dimensions—from small R&D boats up to large production-scale cylinders. Boron nitride crucibles are typically offered in diameters from a few millimeters to several inches, with heights to suit most furnace designs, by BN suppliers in the USA, such as M-Kube Enterprise.

What are BN crucibles used for?

Common uses include:

• Metal casting and alloy melting
  
• Crystal growth (e.g., GaN, AlN)
  
• Vacuum or inert-atmosphere furnace processes
  
• Semiconductor manufacturing
• Non-oxide material synthesis

Their combination of electrical insulation and thermal shock resistance also makes them popular in aerospace and advanced materials research.

What is the maximum temperature BN crucibles can handle?

Under vacuum or inert conditions, BN crucibles perform up to about 1800 °C (3272 °F). In air, they begin to oxidize above roughly 850 °C, so applications above this temperature typically use inert atmospheres or dedicated boron nitride crucible designs.

Are dense or composite BN crucibles available?

Yes. You can choose from fully dense BN crucibles for maximum mechanical strength or composite versions (e.g., BN reinforced with SiC) to boost thermal conductivity and toughness, depending on your application needs.

How should BN crucibles be cleaned?

• Gently brush or wipe away loose residues
  
• Use mild solvents (like isopropyl alcohol) for light cleaning
  
• Avoid strong acids and abrasive tools that can damage the BN surface
  
• For stubborn deposits, perform a low-temperature bakeout in an inert atmosphere
  

Routine, gentle cleaning preserves the non-wetting properties and extends the life of your crucible.