hBN is made by sintering boron nitride powder/flakes into a solid material by hot pressing. It has low wettability to molten metal. 

The BN99 Boron Nitride Disc we offer works well in an inert gas stream at 3500°C, but long-term ambient temperatures should be kept below 2200°C according to high-temperature survival tests. As a result, boron nitride has a wide range of applications in PVD coatings, high-temperature furnace systems, and semiconductor materials manufacturing.

Due to the limit of hot pressed boron nitride raw material, please note that our BN Disc has limits on dimensions.

Diameter/Width/Length < 18″, 0.1″<thickness<8″

Boron Nitride Disc Basic Information & Materials


BNH99, BN99, BN-ZS, BN-AlN



Melting Point

2700 °C


White/White Graphite/Greyish Green

Density, g/cm3

1.6~2.9 g/cm3

Solubility in H2O


Electrical Resistivity, Ω·m


Boron Nitride Materials




Hot pressed at high temperature (1900℃).
Excellent corrosion resistance and thermal conductivity, Limited wear resistance
Self-bonded and high purity (>99%)


General-purpose material
Bonded by boric oxide


Calcium borate bonded boron nitride
Enhanced moisture resistance


BN 60%, SiO2 40%


BN 40%, SiO2 60%


BN-45%, Zr2O3 45%



Boron Nitride Disc Advantages & Applications:

Boron Nitride ceramic from Edgetech Industries Ceramics Division can withstand high temperatures in a 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

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

-Electric insulators in vacuum system

-Insulators for high-temperature furnace

-Spacers for glass melting

-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 Discs are 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.