Customized Industrial High Purity Boron Nitride Gaskets

Overview of Boron Nitride Gasket

Boron Nitride Gasket is a high-performance sealing gasket made of boron nitride as the main raw material. It has the advantages of high-temperature resistance, corrosion resistance, and good insulation properties and can maintain stable performance under extreme conditions. At the same time, boron nitride gasket also has good lubricity and low coefficient of friction, can effectively reduce the wear between mechanical parts, improve the operational efficiency and service life of equipment, and is widely used in aerospace, electronics, chemical and other fields.

Features of Boron Nitride Gasket

Boron Nitride Gasket has a variety of excellent features, so it is widely used in many fields; the following are its main features:

High-temperature resistance: Boron nitride has a high melting point and thermal stability, can maintain structural stability in high-temperature environments, and can withstand high temperatures of more than 1000 ℃, which makes the boron nitride gasket can normally work in high-temperature equipment, not easy to deformation or failure due to high temperature.

Good chemical stability: boron nitride gasket has excellent corrosion resistance to most acids, alkalis and organic solvents, and is not easily eroded by chemicals, which can maintain stable performance in harsh chemical environments, ensure sealing effect and prolong the service life of equipment.

High insulation: boron nitride is an excellent insulating material with high resistivity and dielectric strength; it can effectively prevent the passage of electric current, can be used in electrical equipment, and plays a double role of insulation and sealing to protect the safe operation of equipment.

Low coefficient of friction: boron nitride gasket has a low coefficient of friction and good self-lubrication, which can reduce the friction and wear between parts in the process of mechanical movement, reduce the energy loss, improve the operational efficiency of the equipment, and at the same time help to extend the service life of the gasket itself.

High strength and wear resistance: Boron Nitride gasket has high hardness and strength, can withstand certain pressure and impact, and has good wear resistance, not easy to wear, rupture and other problems in the process of use, and can maintain good sealing performance and mechanical properties.

Specifications table of Boron Nitride Gasket

Property	Typical Value	Unit	Notes
Material Type	Hexagonal Boron Nitride (h – BN)	/	Layered structure similar to graphite; most common form for gaskets
Density	2.27	g/cm³	For h – BN
Hardness (Mohs Scale)	~2	/	Relatively soft compared to c – BN
Melting Point	>3,000	°C	High melting point ensures stability in high – temperature environments
Thermal Conductivity	60 – 300	W/(m·K)	Along the basal plane for h – BN
Coefficient of Thermal Expansion (CTE)	2.5 – 4.5×10⁻⁶	/°C	Low CTE minimizes thermal expansion and contraction
Electrical Resistivity	>10¹²	Ω·cm	Excellent electrical insulation
Dielectric Strength	10 – 20	kV/mm	Good dielectric properties
Chemical Stability	Chemically inert	/	Resistant to most chemicals, even at high temperatures
Friction Coefficient	0.1 – 0.2	/	Self – lubricating properties
Porosity	<1%	/	Typically very low porosity for dense sintered products
Flexural Strength	200 – 400	MPa	Depends on manufacturing process and material type
Compressive Strength	1,000 – 3,000	MPa	High compressive strength suitable for mechanical applications
Operating Temperature Range	-269 to +1,000	°C	Wide range from cryogenic to high temperatures
Neutron Absorption Cross Section	Moderate	Barns	Beneficial for nuclear applications
Band Gap Energy	5.9 – 6.2	eV	Wide band gap makes it suitable for high – power electronic devices

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Applications of Boron Nitride Gasket

Boron Nitride Gasket has a wide range of applications in many fields due to its excellent performance:

Aerospace field: Aero-engines and other components need to work in high temperature, high pressure and complex chemical environments. Boron nitride gasket’s high-temperature resistance, corrosion resistance and high insulation can ensure the sealing and insulation of the internal parts of the engine, which can effectively prevent leakage short-circuit and other problems, ensure the stable operation of the engine, and improve the reliability and safety of the aviation vehicle.

Electronic industry: In electronic equipment, such as semiconductor manufacturing equipment, high-power electronic devices, etc., boron nitride gaskets can be used in chip packaging, heat dissipation structure and other parts. The high insulation of boron nitride gaskets can prevent circuit short-circuits, good thermal stability can help heat dissipation, and low friction coefficient can reduce the wear and tear of parts assembly so as to improve the performance and stability of electronic equipment and extend the service life of the equipment. Chemical industry: Chemical production often involves high temperature, high pressure and strong corrosive media. Boron nitride gaskets can be used in reaction kettles, pipeline connections and other parts, by virtue of their excellent chemical stability and sealing performance, can effectively prevent corrosive media leakage, to ensure the safety and stability of the chemical production process while reducing equipment maintenance costs.

Mechanical engineering field: In some high-precision machining equipment and high-speed mechanical components, boron nitride gaskets can be used for bearings, seals and other parts. The low coefficient of friction and high strength characteristics of boron nitride gaskets can reduce the friction and wear between mechanical parts, improve the precision and operational efficiency of equipment, and reduce energy consumption and maintenance frequency.

Company Profile

RBOSCHCO is a trusted global chemical material supplier & manufacturer with over 12 years of experience in providing super high-quality chemicals and Nanomaterials. The company exports to many countries, such as the USA, Canada, Europe, UAE, South Africa, Tanzania, Kenya, Egypt, Nigeria, Cameroon, Uganda, Turkey, Mexico, Azerbaijan, Belgium, Cyprus, Czech Republic, Brazil, Chile, Argentina, Dubai, Japan, Korea, Vietnam, Thailand, Malaysia, Indonesia, Australia, Germany, France, Italy, Portugal etc. As a leading nanotechnology development manufacturer, RBOSCHCO dominates the market. Our professional work team provides perfect solutions to help improve the efficiency of various industries, create value, and easily cope with various challenges. If you are interested, please send an email to sales1@rboschco.com

Payment Term

T/T, Western Union, Paypal, Credit Card etc.

Shipment Term

By air, by sea, by express, as customers request.

5 FAQs of Boron Nitride Gasket

Q1: How to choose the right boron nitride gasket?

The following factors need to be considered:

Temperature and environment: Choose h-BN for high temperature, and choose low dielectric loss model (e.g. 3M Boron Nitride Cooling Packing) for high frequency or RF environment.

Thermal Conductivity: Select thermal conductivity according to the heat flow density, such as chip heat dissipation needs more than 10W/(m・K).

Mechanical Properties: High-pressure scenarios require high compressive strength (e.g., h-BN with a compressive strength of 170MPa).

Certification requirements: medical devices need to comply with ISO 10993, and food contact needs FDA certification (some products support).

Q2: What do I need to pay attention to when installing boron nitride gaskets?

Surface cleanliness: the flange sealing surface needs to be free of scratches and oil to avoid affecting the sealing effect.

Alignment and pre-tensioning: the gasket should be centered, and the bolts should be tightened symmetrically 2-3 times to avoid skewing or over-compression.

Pressure control: use a torque wrench or hydraulic tightener; pre-tightening force does not exceed the design value to prevent the gasket loss of resilience.

Hot tightening treatment: High-temperature working conditions (>300℃) need to be warmed up after hot tightening to prevent bolt relaxation.

Q3：How to extend the service life of boron nitride gasket?

Regular inspection: Observe whether the gasket is worn, deformed or corroded, and replace it in time.

Avoid chemical erosion: Choose high-purity boron nitride (e.g., BN99) in a strong corrosive environment.

Control working parameters: avoid over-temperature and over-pressure operation and reduce material fatigue.

Q4: What factors affect the price of boron nitride gaskets?

Material purity: high purity (e.g., 99%) products are more expensive and are suitable for high-end fields such as semiconductors.

Manufacturing process: Complicated processes such as the cold-pressing shear force orientation method will increase the cost but can improve the thermal conductivity.

Size and customization: Non-standard sizes or special shapes require additional processing costs.

Market supply and demand: Demand surges in new energy vehicles and other fields may lead to price fluctuations.

Q5: What are the advantages of boron nitride gaskets over other materials (e.g. graphite, PTFE)

High-temperature resistance: graphite is easy to oxidize above 500℃, while boron nitride can remain stable at 2800℃.

Insulation: PTFE has better insulation but low thermal conductivity (0.25W/(m・K)), while boron nitride has 10 times higher thermal conductivity.

Chemical stability: boron nitride is resistant to strong acids and alkalis other than hydrofluoric acid, while PTFE may soften at high temperatures.