057-021 Boron Nitride Bush & Washer

Material: Boron Nitride 





Boron nitride is a white and low porosity solid material. Due to the platy hexagonal crystals and their orientation during the hot press consolidation, the material is anisotropic in its electrical and mechanical properties. It is easily machined into complex shapes using standard carbide tooling.

Boron nitride ( BN ) bush, which is high thermal conductivity, low thermal expansion, good thermal shock resistance, high temperature resistance, high electrical resistance,  easily machined, etc.
Application: Electronic parts, High temperature furnace fixtures and supports; Vacuum melting crucibles;  CVD crucibles; Low friction seals;  Plasma arc insulators, Spacer; Nozzle,  etc.
Main properties:
Content :  BN >  97.5%
Density :  2.1-2.2 g/cm3
Working temperature max. :   Vacuum    2200C
Inert atmosphere  2400C
Flexural strength:              100 MPa
Compressing strength          280 MPa
Thermal conductivity            35 W/(m * K ) 
Coefficient of thermal expansion      2.0 x 10 -6 / K

Main Properties:
 High thermal conductivity
 Low thermal expansion
 Good thermal shock resistance
 High electrical resistance
 Easily machined
 Low dielectric constant and loss tangent
 Microwave transparency
 Chemically inert


If you do not find a matching ceramic guide on our web page, please feel free to contact us directly.
Customized products can be provided. Welcome to send us your design drawing / specifications 


Shanghai Everspring Ceramic Co., Ltd. , one of the main leading suppliers in China for advanced and high tech ceramic parts and accessories,  which are widely used as substitute for traditional materials due to it's special properties.
Adhere to the philosophy 'quality first', we guarantee to supply high quality products with professional service and competitive prices. Our products are well received by our customers at home and abroad, such as in USA, Germany, and UK etc.  
We maintain a facility for custom manufacturing to meet your special specifications. If you are working on a new design, you are welcome to take advantage of our substantial experience in development new products. In that case we could choose suitable material and process for you considering both your application and economical efficiency.