What is special about Boron Nitride Ceramics？

July 18, 2024

Boron nitride is an advanced synthetic ceramic material available in solid and powder form. Its unique properties – from high heat capacity and outstanding thermal conductivity to easy machinability, lubricity, low dielectric constant, and superior dielectric strength – make boron nitride a truly outstanding material.

In its solid form, boron nitride is often referred to as “white graphite” because it has a microstructure similar to that of graphite. However, unlike graphite, boron nitride is an excellent electrical insulator that has a higher oxidation temperature. It offers high thermal conductivity and good thermal shock resistance and can be easily machined to close tolerances in virtually any shape. After machining, it is ready for use without additional heat treating or firing operations.

Material Advantages

To make solid shapes, hexagonal Boron Nitride (hBN) powders and binders are hot-pressed into billets up to 490mm x 490mm x 410mm at pressures up to 2000 psi and temperatures up to 2000°C. This process forms a material that is dense and easily machined and ready to use. It is available in virtually any custom shape that can be machined and has unique characteristics and physical properties which make it valuable for solving tough problems in a wide range of industrial applications.

Excellent thermal shock resistance
High electrical resistivity – excluding aerosols, paints, and ZSBN grade
Low density
High thermal conductivity
Anisotropic (thermal conductance differs between parallel and perpendicular planes to pressing direction)
Corrosion resistant
Good chemical inertness
High temperature material
Non-wetting
High dielectric breakdown strength, >40 KV/mm
Low dielectric constant, k=4
Excellent machinability

Applications

Break rings for continuous casting of metals
Crucibles and containers for high purity molten metals and glasses
Deck plates
Heat treatment fixtures
High temperature lubricants
High temperature valves
High temperature and high voltage electrical insulators
Induction heating coil supports
Laser Nozzles
Mold release agents
Molten metal and glass castings
Nozzles for transfer or atomization
Nuclear Shielding
Radar components and antenna windows
Refractory applications
Spacers
Vacuum furnace supports which require electrical resistivity
Setter plates for high temperature furnaces
Electrical insulators for high temperatures and high voltages
Vacuum feedthroughs
Plasma chamber lining and fittings
Nozzles for non-ferrous metals and alloys
Thermocouple protection tubes and sheaths
Laser supports

Jinghui Industry Limited is a leading manufacturer of Advanced ceramics products, we have been committing to development, production, sales and service of a variety of Ceramic Components since its establishment in 2008.

The facility focus on producing mainly in alumina, zirconia, aluminum nitride, steatite and cordierite, including Metallized Ceramics, ceramic grinders, ceramic plates, structural ceramic components, Thermostat Ceramics, Ceramic Seals , Textile ceramics , Ceramic Insulators and other plenty of electronic and industrial Ceramic parts. They are mainly used in electronic appliances, equipment, and mechanical engineering, automotive industry, medical technology, new energy and environmental protection, aerospace and so on.

The enterprise acquired ISO9001: 2008 in 2009, all of us in Jinghui persist the policy "No quality, No development", and it helped us succeed in exporting to more than 50 countries on European, North America, Asia, South America and African through all Jinghui people's effort, innovation, and initiative.

Many amazing solutions were to be supplied to our customers to reach their toughest technical challenges. Our goal is to find a better and optimal solution for all our customers from technology, quality, cost control, and after-sales services, we are looking forward to cooperating with you to create a totally new business in your field.

Author:

Mr. Andy Chen

E-mail:

andy@jinghui0738.com

Phone/WhatsApp:

8613760126904