Boron Nitride Crucibles, Material Info for Boron Nitride products.

Boron Nitride

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Our standard boron nitride (BN) crucibles are high purity ( >99%), crafted through hot pressing. These crucibles exhibit outstanding resistance to thermal shock, superior electrical resistivity, and resistance against corrosion from acids and alkalis.

High-purity BN ceramic crucibles are used extensively in high-temperature applications that require exceptional thermal stability, chemical inertness, and purity.

This standard BN crucible is ideal for sintering and smelting:

Nonferrous and ferrous metals such as aluminium, bismuth, germanium, antimony, tin, cadmium, lead, nickel, zinc, copper, magnesium, iron, stainless steel
Glass melting including soda glass and cryolite
Molten salt, fluoride, slag

Precautions for using BN Crucibles

Ensure the operating temperature in the air does not exceed 1000°C. Exceeding this temperature may cause oxidation and peeling of the boron nitride surface in contact with oxygen.
Boron nitride readily absorbs moisture. Store the crucible away from humid areas and avoid washing it. Cleaning can be done by directly wiping with sandpaper or using alcohol.
Avoid using with substances such as antimony trioxide, chromium oxide, molybdenum trioxide, arsenic trioxide, titanium carbide, high-lead glass glaze (if necessary, use under Ar or N2 as a protective gas), boron phosphate, potassium phosphate, hot and concentrated alkali, molten alkali, and chlorine.

Material properties

Please note that the information set forth herein is offered for comparison only, and is not to be construed as absolute engineering data or constituting a warranty or representation for which we assume legal responsibility.

Property	Unit
Purity %	>99
Density (g/cm3)	1.95-2.0
Volume resistivity (Ω・cm)	>10(14)
Maximum operating temperature（°C) – Air	900
Maximum operating temperature（°C) – Inert gas (Ar, N2)	2100
Maximum operating temperature（°C) – Vacuum	2000
Flexural Strength (MPa)	30
Compressive Strength (MPa)	55
Coefficient of thermal expansion, 10-6/K, room temperature to 1000 °C	1.5
Thermal conductivity (W/m･K）at 25 °C	35