We offer standard hot-pressed boron nitride crucibles and custom-made crucibles. In addition to pure BN99 crucible, we also supply BN compound with silicon carbide, calcium borate, aluminum nitride and zirconium to meet customers’ different requirements. Check the boron nitride specifications for our pure BN99 and ZSBN zirconium compound.
Our BN99 crucibles have been registered to operate at 3500C inert gas. Note that BN also survives high temperatures in vacuum, as it decomposes after 1900C. heegermaterials can supply custom boron nitride crucibles and other machined items with MOQs starting at $200. A typical boron nitride crucible kit consists of a crucible body and a stepped boron nitride lid (lids with holes for pressure equalization are available). Other shapes can be made to order according to drawings. Click here to download your drawing and request a quotation.
Boron Nitride core and material type
Compound Formula BN
Molecular weight 24.82
Appearance white
Melting point 2973 °C
Density 2.1 g/cm3 (h-BN); 3.45 g/cm3 (c-BN)
Solubility in H2O Insoluble
Refractive index 1.8 (h-BN); 2.1 (c-BN)
Electrical resistance 13 to 15 10x Ω-m.
Dimensions H<12″, OD or W&L<12″, wall thickness>2mm
Crucible type Cylindrical, Cylindroconical, Rectangular, T-shape, Individual
Materials Boron nitride
Material Description
BN99 Hot pressed at high temperature (1900℃).
Excellent corrosion resistance and thermal conductivity. Limited abrasion resistance.
Self-adhesive and high purity (>99%).
General purpose BNBO material
Bonded boron oxide
BNCB calcium borate nitride bonded to boron nitride.
Increased moisture resistance
BN60 BN 60%, SiO2 40% BN40 BN 40%, SiO2 40% BN40 BN 40%, SiO2
BN40 BN 40%, SiO2 60% BN40 BN 40%, SiO2 60% ZSBN
ZSBN BN-45%, Zr2O3 45% ZSBN BN-45%, Zr2O3 45
Boron nitride ceramics Advantages and applications
Boron nitride ceramics from heegermaterials Industries’ ceramics division can withstand high temperatures in a high vacuum environment while demonstrating excellent corrosion and current resistance.
-Low wettability to molten metal.
-Relatively high thermal conductivity and low thermal expansion.
-High thermal shock resistance.
-Extremely high operating temperatures with adequate protection against inert gases (>3000°C have been recorded).
In view of the above properties, boron nitride ceramic crucible is the ideal choice for a wide range of industries, such as …. :
-Melting crucibles for crystal growth.
-Breaking rings for horizontal wheels -Isolators for horizontal furnaces.
-Insulators for high temperature furnaces.
-Electrical insulators in a vacuum system.
-Power supply for high voltage equipment.
Packaging
As a ceramic material, boron nitride is in many cases quite brittle. Our hot-pressed boron nitride crucible is carefully processed to minimize damage during storage and transportation. Suitable outer boxes and inner cushioning materials are used for BN products, and vacuum packaging is also used for some parts.
