Boron Nitride Break Ring (H-BN)

Diameter: 10~400mm, Thickness: >2mm


Boron Nitride Break Ring (H-BN)


We provide standard products & tailor-made products for hot-pressed boron nitride crucibles. Except for pure BN99 crucible, we also supply BN composites with silicon carbide, calcium borate, aluminum nitride and zirconia, to fulfill various of demand for the customers. Check the boron nitride specifications for our pure BN99 and zirconia composite material ZSBN.


Boron Nitride Break Ring Basic Information & Materials


MaterialBN99, ZSBN, BN-AlN, HBN
Molecular Weight24.82
Melting Point2973 °C
Density2.1 g/cm3 (h-BN); 3.45 g/cm3 (c-BN)
Solubility in H2OInsoluble
Refractive Index1.8 (h-BN); 2.1 (c-BN)
Electrical Resistivity13 to 15 10x Ω-m
DimensionsDiameter: 10~400mm, Thickness: >2mm

*Enhanced boron nitride discs are usually available within 12″x12″x12″.


Boron Nitride Materials


BN99Hot pressed at high temperature (1900℃).
Excellent corrosion resistance and thermal conductivity. Limited wear resistance
Self-bonded and high purity (>99%)
BNBOGeneral purpose material
Bonded by boric oxide
BNCBCalcium borate bonded boron nitride
Enhanced moisture resistance
BN60BN 60%, SiO2 40%
BN40BN 40%, SiO2 60%
ZSBNBN-45%, Zr2O3 45%


Boron Nitride Break Ring Advantages & Applications:


Boron Nitride ceramic from Edgetech Industries Ceramics Division can withstand high temperature in the high vacuum environment, plus it has excellent corrosion resistance and electrical resistance.

-Low wettability to molten metal
-Relatively high thermal conductivity with low thermal expansion
-Relatively high thermal shock resistance
-Extremely high working temperature with proper inert gas protection (>3000C has been recorded).

Based on the above properties, Boron Nitride Break Ring is an ideal choice in a wide range of industries, such as:

-Nozzles for nonferrous metals metallurgy industry
-Insulators for high temperature furnace
-Break rings for horizontal casting machine
-Feed through for high voltage equipment
-Boron Nitride parts for ion injection equipment




As a ceramic material, boron nitride is quite fragile in a lot of cases. Our Hot-Pressed Boron Nitride Break Ring is carefully handled to minimize damage during storage and transportation. Suitable outer boxes and inner cushioning materials are used for BN products, vacuum packing is also engaged for some of the parts.


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