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Hot Pressed Boron Nitride Crucible (H-BN)

Hot Pressed Boron Nitride Crucible (H-BN)

Hot Pressed Boron Nitride (HPBN) Crucibles are high-performance ceramic crucibles made from hot-pressed boron nitride powder. The hot pressing process results in a material with excellent thermal stability, high thermal conductivity, high electrical resistivity, and excellent machinability. HPBN crucibles are used in a wide range of high-temperature applications in industries such as aerospace, electronics, and metallurgy.

HPBN crucibles are characterized by their high purity, low porosity, and high thermal shock resistance. They can withstand high temperatures up to 2000°C in inert and reducing atmospheres and up to 1000°C in oxidizing atmospheres. HPBN crucibles are also chemically inert and non-wetting, making them ideal for use with molten metals and other reactive materials.

HPBN crucibles are available in various shapes and sizes, including cylindrical, conical, and rectangular. They are commonly used for applications such as melting and casting metals and alloys, chemical analysis, and crystal growth. HPBN crucibles are also used as heating elements in high-temperature furnaces and as insulation materials in vacuum and controlled-atmosphere furnaces.

Boron Nitride Ceramics Specification

CG Material production formulations are developed to address the varied application problems in which ceramic components are commonly used. Many industrial applications push the envelope on specific requirements leading to the development of new formulations to successfully address them.

Item No. Description Purity Lot Size
CG-NI05-98 Boron Nitride Powder
Particle Size: 3 µm, 200 mesh or 325mesh
BN > 98 %,
B2O3 < 0.6%,
Ca < 0.015%,
Si < 0.12%
100 kg
CG-NI05-99 Boron Nitride Powder
Particle Size: 3 µm, 200 mesh or 325mesh
BN > 99 %,
B2O3 < 0.4%,
Ca < 0.01%,
Si < 0.10%
100 kg

Comparison of Boron Nitride Ceramics

Compositions BN>98% BN+SiC+ZrO2 BN+AIN
Binder B2O3 / AlBO3
Density 2.1-2.2 g/cm3 2.3-3.0 g/cm3 2.5-2.6 g/cm3
25°C Volume Resistivity >1013 Ω·cm >1012 Ω·cm >1014 Ω·cm
Max. Service Temp. (°C)
Inert Gas;
High Vacuum










Flexural Strength 75 Mpa 100 Mpa 130 Mpa
Compressive Strength 100 Mpa 300 Mpa 250 Mpa
Coefficient of Thermal Expansion
2.0 x 10–6/K 4.0 x 10–6/K 4.5 x 10–6/K
Thermal Conductivity 30 W/mK 40 W/mK 60 W/mK


Hot Pressed Boron Nitride Crucible Available Materials

Material Description Availability
BN99 Hot pressed at high temperature (1900℃).
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 resistance
Finished Parts
BN60 BN 60%, SiO2 40% Finished Parts
BN40 BN 40%, SiO2 60% Finished Parts
ZSBN BN-45%, Zr2O3 45% Finished Parts

Hot Pressed Boron Nitride Crucible Applications

Boron Nitride ceramic from CG Material can withstand high temperatures in a 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


We handle our products with care to ensure they remain in their original condition during storage and transportation and to preserve their quality.


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