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AEM Deposition

Boron Nitride Crucible (BN)

Boron Nitride Crucible (BN)
Boron Nitride Crucible (BN)

Boron Nitride Crucible

Boron Nitride, also known as BN, Hexagonal Boron Nitride (H-BN) and hot-pressed Boron Nitride, is a good self-lubricate ceramic that can withstand high temperature and maintain its lubricating capability in a high vacuum environment. AEM’s Boron Nitride crucibles are made from hot-pressed Boron Nitride blank. Hexagonal Boron Nitride (H-BN) behaves similarly with graphite mechanically, but offers excellent electrical resistance.

Boron Nitride Crucible Information

Compound Formula BN
Purity >99%, >99.7%
Molecular Weight 24.82
Melting Point 2973 °C
Density 2.1 g/cm3 (h-BN); 3.45 g/cm3 (c-BN)
Solubility in H2O Insoluble
Mohs hardness 2
Flexural strength 35 Mpa
Coefficient of thermal expansion
 (25℃-1200℃)
2.0 x 10-6/K
Thermal Conductivity at 20℃ 40 W/mk
Maximum working temperature  Oxidizing 900℃
Vacuum 1900℃
Inert 2100℃
Refractive Index 1.8 (h-BN); 2.5 (c-BN)
Electrical Resistivity 13 to 15 10x Ω-m
Capacity 25ml, 55ml, 75ml, 100ml, 1000ml, and customized

Boron Nitride Crucible Dimension

 

 

 
Type Top Diameter Height Thickness Angle Volume
BN-2 A=0.706" B=0.465" C=0.093" D=15°  2 ml
BN-3 A=0.805" B=0.545" C=0.093" D=15°  3 ml
BN-4 A=0.885" B=0.595" C=0.093" D=15°  4 ml
BN-7 A=1.125" B=0.520" C=0.093" D=15°  7 ml
BN-12 A=1.35" B=0.680" C=0.125" D=15°  12 ml
BN-15 A=1.48" B=0.670" C=0.125" D=15°  15 ml
BN-20 A=1.673" B=0.768" C=0.093" D=15°  20 ml
BN-40 A=2.030" B=1.020" C=0.093" D=15°  40 ml
AEM offers customized service of BN crucible shapes and dimensions for our customers. 

Available Materials of Boron Nitride Crucible

Material Description Availability
BN99 Hot pressed at high temperature (1900C).
Excellent corrosion resistance and thermal conductivity.
Limited wear resistance
Self-bonded and high purity (>99%)
Machinable Blanks
Finished Parts
BNBO General purpose material
Bonded by boric oxide
Finished Parts
BNCB Calcium borate bonded boron nitride
Enhanced moisture resitance
Finished Parts
BN60 BN 60%, SiO2 40% Finished Parts
BN40 BN 40%, SiO2 60% Finished Parts
ZSBN BN-45%, Zr2O3 45% Finished Parts

Boron Nitride Crucible Application

Boron Nitride ceramics from AEM can withstand high temperatures in the high vacuum environment, plus it has excellent corrosion resistance and electrical resistance. Thus, Boron Nitride ceramic product is an ideal choice in a wide range of industries, such as:

- Crucibles for crystal growth

- Break rings for horizontal casting machine

- Insulators for high-temperature furnace

- Electric insulators in vacuum system

- Feed through for high voltage equipment

- Use for Sintering and Melting alloy, ceramics, rare earth and other materials

Related Crucible of Boron Nitride Crucible

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