XTL sintyron pbn pyrolytic boron nitride ceramic plain washer ring

Boron nitride (BN) washer rings leverage the unique properties of boron nitride, a versatile material with applications

in high-performance environments. 
Product details

1. Material Properties

• Thermal Stability and Conductivity: Hexagonal boron nitride (h-BN), known for its graphite-like structure,

exhibits excellent thermal conductivity (~7.4 W/cm·K) and stability at extreme temperatures (up to 2600°C decomposition point) .

This makes BN washer rings ideal for high-temperature applications like aerospace or industrial machinery.

• Lubricity and Wear Resistance: h-BN’s layered structure provides self-lubricating properties, reducing

friction in tribotechnical pairs . Combined with mechanical wear resistance, BN composites (e.g., with epoxy or polymers)

enhance durability in dynamic systems.

• Electrical Insulation: BN is electrically insulating, even under mechanical stress, making it suitable for

electronic devices requiring thermal management without electrical interference.

2. Manufacturing Insights

• Ceramic Sintering: h-BN ceramics can be produced via low-temperature hot-pressing (e.g., 1450°C under 30 MPa),

achieving ~96% relative density and flexural strength of 90 MPa . This method ensures uniform grain structure, critical for

consistent performance in washer rings.

• Composite Integration: BN composites with materials like graphene or polymers improve mechanical properties

(e.g., fracture toughness up to 2.76 MPa·m¹/²) while retaining thermal advantages .

3. Applications

• High-Temperature Environments: Used in furnaces, turbines, or reactors where thermal shock resistance and

insulation are critical .

• Electronics: As insulating spacers in power modules or semiconductor equipment, leveraging BN’s

dielectric properties .

• Tribological Systems: In automotive or industrial machinery, BN washer rings reduce wear in bearings

or seals due to their low friction coefficient .

4. Comparison with Other Materials

• vs. Graphite: BN offers superior oxidation resistance and electrical insulation, unlike conductive graphite .

• vs. Cubic Boron Nitride (c-BN): While c-BN is harder (Mohs 9.5), h-BN is preferred for lubrication and thermal

applications due to its layered structure 

Why choose us

    Liling Xingtailong Special Ceramic Co., Ltd Founded in 1997, is an independent R&D and manufacturing enterprise integrating

scientific research and production. "Superior quality, preferential price" is our business purpose. The company mainly produces

PBN and BN products. Over the years, the company has been deeply involved in development, and has successively obtained (ISO9001,

Alibaba's ten-year-old high-quality supplier, China Manufacturing Network certified supplier, high-tech enterprise certification, gold

product enterprise certification, ceramic industry AAA credit unit，product ROHS testing certification, and 6 invention patents.      

The company has always adhered to the goal of quality survival, innovative development, honest brand, and meticulous and thoughtful

after-sales service. Region, product quality and service are highly recognized by customers.   Striving to be Stronger, hard work and

progress. The company initiates a professional responsible person model, continuously improves and innovates, and strives to provide

each customer with better and more efficient services.   With strong strength, reasonable price and professional service, We has

established long-term cooperative relations with large enterprises at home and abroad. "Excellent quality, preferential price" is our

business purpose.   We sincerely look forward to cooperating with more domestic and foreign customers and developing together.

Customer feedback

FAQ

 

FAQ

Why us?
* Professional manufacturer since 1997.
* Strict quality control on production process and tolerance.
* Free samples available
* Customized production based on your drawing or specification
* On-time delivery and reliable support and service
* Inventory available for quick shipment
* We keep confidentiality of all the drawings and business information between us.
Are you a trading company or a manufacturer?
* We are a manufaturer. 
Can you provide the free samples?
* Yes,we can offer free sample if we have it in stock,but the courier fee is to be collected.
Do you accept customized production based our specification?
* Yes,we offer OEM and ODM service. Just send us your drawing if you have it. If you don’t

have a drawing, just tell us your idea, we will work out the drawing for you.

What's the delivery time?
* 7 working days for standard products 30 days for customized products. 
What is the MOQ?
* No limit to the quantity. We can offer the best proposal and solutions according to your condition.
What is the payment terms you accept?
* T/T,LC,Western Union,moneygram are acceptable.
How to deal with the faulty?
* Firstly, Our product are produced in strict quality control system and the defective rate will be less than 2%.
If there are problems with the product, we will provide free replacement.