XTL sintyron 99% hexagona boron nitride ceramic tube

Product Instruction

Boron nitride crystal belongs to the hexagonal crystal system, similar in structure and graphite, and there are many similarities

in performance, so it is also called "white stone ink", which has good heat resistance, thermal stability, thermal conductivity,

high temperature dielectric strength, and is an ideal heat dissipation material and high temperature insulation material.

Boron nitride has good chemical stability and can resist the etching of most molten metals. It also has good self-lubricity.

Boron nitride products have low hardness and can be machined with an accuracy of 1/100mm.

Item		Unit	Index
Thermal Conductivity (RT)		W/m·k	40-50
Thermal expansivity(25-700)		10-6 °C	6.5-7.5
Resistivity (RT)		Ω·m	>1012
Puncture voltage		10-6 /kv·m	2.5-4.0
Mohs' hardnees		/	2
Dielectric constant (Σ)		/	3.8-4.3
Bending strength (RT)		mpa	>35
Compression strength (RT)		mpa	>200
Density		g/cm3	1.9-2.2
Chemical Composition	B+N	%	99.5
	Oxygen Content	%	<0.4
	Carbon Content	%	<0.02
Working Environment Temperature	Oxidizing Atmosphere	℃	850
	Vacuum	℃	1800
	Inertia	℃	2300

Product details

Properties of Boron Nitride Ceramic Tubes：

Thermal Conductivity:

1. High thermal conductivity, especially in hexagonal boron nitride (h-BN), making it ideal
   for heat dissipation and thermal management.
2. Maintains thermal stability at high temperatures.

Electrical Insulation:

1. Excellent electrical insulator, even at elevated temperatures.
2. Suitable for use in high-voltage and high-temperature electrical applications.

Chemical Resistance:

1. Highly resistant to most chemicals, including acids, alkalis, and molten metals.
2. Inert to reactive substances, making it ideal for corrosive environments.

Thermal Stability:

1. Can withstand extreme temperatures, often up to 1000°C in air and even higher in
   inert or vacuum environments.
2. Low thermal expansion coefficient, reducing the risk of cracking under thermal stress.

Mechanical Properties:

1. Hexagonal boron nitride (h-BN) is relatively soft and machinable, similar to graphite.
2. Cubic boron nitride (c-BN) is extremely hard and durable, though less commonly used for tubes.

Lubricity:

1. Hexagonal boron nitride has excellent lubricating properties, even at high temperatures, due to its layered structure.

Non-Wetting Properties：

1. Boron nitride does not wet with most molten metals, making it ideal for metal casting and handling applications.

Types of Boron Nitride Ceramic Tubes

Hexagonal Boron Nitride (h-BN) Tubes:

1. Soft, machinable, and lubricious.
2. Used in applications requiring thermal conductivity, electrical insulation, and lubrication.
3. Commonly used in hot-pressed form (HPBN) for improved density and strength.
    

Types of Boron Nitride Ceramic Tubes

1. Hexagonal Boron Nitride (h-BN) Tubes:

   • Soft, machinable, and lubricious.

   • Used in applications requiring thermal conductivity, electrical insulation, and lubrication.

   • Commonly used in hot-pressed form (HPBN) for improved density and strength.

2. Hot-Pressed Boron Nitride (HPBN) Tubes:

   • Made by hot-pressing hexagonal boron nitride powder.

   • Dense, strong, and suitable for high-temperature and high-stress applications.

3. Pyrolytic Boron Nitride (PBN) Tubes:

   • Produced by chemical vapor deposition (CVD).

   • High purity and excellent thermal and electrical properties.

   • Used in semiconductor and optical applications.

Applications of Boron Nitride Ceramic Tubes

1. Thermal Management:

   • Heat exchangers, thermocouple protection tubes, and insulating sleeves in high-temperature environments.

   • Used in furnaces, kilns, and thermal processing equipment.

2. Metal Casting and Molten Metal Handling:

   • Crucibles, nozzles, and tubes for handling molten metals (e.g., aluminum, steel, and copper).

   • Non-wetting properties prevent adhesion and contamination.

3. Semiconductor Manufacturing:

   • Diffusion tubes, insulators, and components in semiconductor production.

   • Provides a clean, non-reactive surface for high-purity processes.

4. Aerospace and Defense:

   • Components for high-temperature environments, such as rocket nozzles and thermal shields.

   • Lightweight and durable solutions for extreme conditions.

5. Electrical Insulation:

   • Insulating sleeves and tubes in high-voltage and high-temperature electrical systems.

   • Used in capacitors, transformers, and other electronic components.

6. Chemical Processing:

   • Tubes and liners for corrosive chemical environments.

   • Resistant to acids, alkalis, and other reactive substances.

7. Optical and Laser Applications:

   • Tubes and components for high-power lasers due to its transparency to infrared and microwave radiation.

   • Used in optical systems requiring high thermal stability.

Advantages of Boron Nitride Ceramic Tubes

• Lightweight compared to metals.

• Excellent thermal and electrical insulation.

• High resistance to thermal shock.

• Non-toxic and environmentally friendly.

• Superior performance in extreme environments.

 

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

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.