Boron Nitride Blank (BN Blank)

Dimensions: Max: 12" dia. x 16" H


Boron Nitride Blank, BN Blank


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

Boron nitride (BN) blanks are usually the raw material to make the other machined parts. It could also directly be applied directly as insulators in some electronic or vacuum equipment with simple machining.

Edgetech supplies pure and enhanced BN blanks in all available dimensions with a quick turnaround. Typical BN products are smaller than 12″ dia x 15″ length rod, due to the limitation of our equipment.


Boron Nitride Blank Basic Information & Materials


MaterialHigh purity/Enhanced hot pressed hexagonal boron nitride
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
DimensionsMax: 12″ dia. x 16″ H


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 Blank Advantages:

-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).




As a ceramic material, boron nitride is quite fragile in a lot of cases. Our Hot-Pressed Boron Nitride Blank 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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