Hot Pressed Sintered Boron Nitride

Your Professional Hot Pressed Sintered Boron Nitride Supplier

Superior Ceramics Times Technology Co., Ltd. is a manufacturer specializing in the production of advanced ceramic materials, including nitrides, oxides, carbides, and composite ceramics. Our product portfolio encompasses silicon carbide, aluminum nitride, alumina, ultrapure alumina, yttria, zirconia, high-purity and high-performance boron nitride ceramics, zirconia toughened alumina (ZTA), alumina toughened zirconia (ATZ), silicon nitride, as well as other reinforced, composite, and high-performance ceramic materials.

Advanced Production Technology

The company employs advanced manufacturing technologies, including sintering, molding, grinding, CNC machining, laser drilling, precision grinding, and polishing processes.

Complete Production Equipment

Key production equipment includes sintering furnaces, isostatic presses, grinders, engraving machines, laser cutters, double-sided grinding machines, sand wire cutting devices, and injection molding machines.

 

Professional R&D Team

Our team consists of experienced experts dedicated to researching advanced ceramic materials. To date, the team has published over 100 academic papers, filed five Chinese invention patents, and obtained more than 20 utility model patents.

Professional Service

The product has technical support from Ph.D. experts and other experts during the research and development stage. The process is rigorous during the production process, and the after-sales service is on call 24 hours a day.

 

 

 
 
Parameter

 

Number

Performance

Unit

Boron nitride

BN99.9%

1

Density

g/cm3

2.15

2

Flexural strength

MPa

94~95

3

Fracture toughness

MPa·m1/2

 

4

Dielectric constant

εr(20℃,1MHz)

4.37

5

Hardness

GPa

1.15

 

Hardness

HRC

 

6

Volume resistivity

Ω·cm(20℃)

 

7

Elastic modulus

GPa

29.4

8

Coefficient of thermal expansion

×10-6/k

1-2

9

Compressive strength

MPa

120

10

Abrasions

g/cm2

 

11

Thermal conductivity

W/m×k(20℃)

35

12

Poisson's ratio

/

 

13

Insulation strength

kv/mm

 

14

Temperature

1000 in air/2200 in inert atmosphere

 

Main Properties of Hot Pressed Sintered Boron Nitride
 

High heat resistance: Oxidation starts at 900 °C in an oxidizing atmosphere, safely can be used up to 2000 °C under vacuum, and does not soften at 2800 °C in an inert gas; its strength is 1800 °C twice as much as room temperature.

 

High thermal conductivity: The hot-pressed product is 33W/m·k, which is the same as pure iron. Above 530°C, it is the most thermally conductive material in ceramic materials.

 

Low thermal expansion coefficient: The expansion coefficient of 2×10-6 is second only to quartz glass, which is the smallest among ceramics.

 

Excellent electrical properties: Good high temperature insulation, 1014 Ω-cm at 25 °C, 103 Ω-cm at 2000 °C, the best high temperature insulation material in ceramics, breakdown voltage is 3KV/mm. Low dielectric loss, 2~5×10-4 at 108Hz, dielectric constant of 4, transparent microwave and infrared.

 

Good corrosion resistance: With general metals (iron, copper, aluminum, lead, etc.), rare earth metals, precious metals, semiconductor materials (silicon, silicon, potassium arsenide,), glass, molten salt (crystal, fluorine) Compound, slag), inorganic acid, alkali do not react.

 

Low friction coefficient: μ is 0.16, and does not increase at high temperature.

 

Machinability: Its hardness is Mohs 2, so it can be processed into high precision parts by general machining methods, and the processing precision can reach 0.01mm.

 

Hot-Pressed Boron Nitride Ceramic Nozzle
Applications of Hot Pressed Sintered Boron Nitride

● High temperature furnace fixtures and supports


● Nozzles for metal powder gas atomization


● Nozzle for amorphous soft magnetic


● Plasma arc insulators


● Crucibles or containers for metals or glasses smelting


● Break rings for continuous casting of metals


● Electrical insulators for high temperature vacuum equipment


● Electrical insulator for PVD/CVD vacuum coating equipment


● Electrical insulator for semiconductor equipment


● Thermocouple protection tubes

 

Order Process

Step 1: Order confirmation
First, an internal contract review will be done. We will confirm your needs, including product specifications, quantity, unit price,delivery time, etc., to ensure that the order information is accurate.

 

Step 2: Production evaluation and plan
We will evaluate production capacity including raw material procurement, production equipment and production personnel arrangements, and then formulate a production plan, including production schedule, procurement plan, production process, etc., to ensure that production is carried out in an orderly manner.

 

Step 3: Process control and product inspection
During the production process, we will conduct quality control on raw materials, production equipment, and production personnel . After the production is completed, we will conduct strict inspection and testing on the product to ensure that the product meets the specifications and quality you require.

 

Step 4: Packaging and delivery
When the product passes the inspection, we will pack and ship it to ensure safe and complete delivery to you.

 

Step 5: After-sales service
After the product is delivered, we will establish a sound after-sales service system to respond and deal with your questions and needs in a timely manner to ensure customer satisfaction.

 

Packaging and Shipping

 

Packaging

The package of our products usually includes bubble wrap, carton, pallet and wooden case, etc. Also it can be designed according to your demands.

Shipping

Shipping by sea, by air, by express are acceptable. According to your requirements.

Payment terms

TT / Western Union / Paypal 50% payment in advanced and 50% before shipment

 

 

Our Factory

 

Superior Ceramics Times Technology Co., Ltd. was established in 2005 and has several production plants in Taizhou, Shaoxing, etc. We also have a registered company in the United States, located at 10 ROBIN, IRVINE, CA 92604.

 

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Our Certificates

 

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FAQ

 

Q: What is hot pressed sintered boron nitride?

A: Hot-pressed boron nitride is a ceramic material made by densifying boron nitride (BN) powder at high temperature (1800-2200℃) and high pressure (20-50 MPa). It is mainly divided into hexagonal boron nitride (h-BN) and cubic boron nitride (c-BN). It has excellent high temperature resistance, insulation and lubrication properties.

Q: What are the microstructural characteristics of hot pressed sintered boron nitride?

A: Hot pressed sintered boron nitride is stacked in layers, with grains arranged along the pressure direction; c-BN is an equiaxed crystal system, with clean grain boundaries and no glass phase, and a density of ≥98%.

Q: What is the temperature limit of hot pressed sintered boron nitride?

A: Hot pressed sintered boron nitride can withstand temperatures of 1000℃ in air and 2800℃ in an inert atmosphere; c-BN begins to oxidize at 1200℃ in air and requires coating protection.

Q: Why is hot pressed sintered boron nitride commonly used in cutting tools?

A: After hot pressing, the hardness of c-BN is close to that of diamond, and it can cut hardened steel (HRC>50). The cutting speed is 3 times higher than that of cemented carbide, and the service life is 10 times longer.

Q: Why is the cost of hot pressed sintered boron nitride so high?

A: It requires special high-temperature and high-pressure equipment (such as a hot-press furnace), high powder purity requirements (h-BN ≥ 99%), and low production efficiency (single sintering only takes a few hours).

Q: How stable is hot pressed sintered boron nitride in a humid environment?

A: Hot pressed sintered boron nitride easily reacts with water to generate NH₃, and needs to be coated with a SiO₂ or Al₂O₃ moisture-proof layer on the surface; c-BN is chemically inert and has better water resistance than h-BN.

As one of the most professional hot pressed sintered boron nitride manufacturers and suppliers, we're featured by quality products and good price. Please rest assured to buy high-grade hot pressed sintered boron nitride from our factory.