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HBN Boron Nitride Ceramic Tube

  • HBN Boron Nitride Ceramic Tube
  • HBN Boron Nitride Ceramic Tube
  • HBN Boron Nitride Ceramic Tube
  • HBN Boron Nitride Ceramic Tube
HBN Boron Nitride Ceramic Tube
  • MASCERA
  • Xiamen, China
  • 20 days after order
  • 3000 pieces per month

Boron nitride tubes made of hot pressed boron nitride ceramics have good electrical insulation, the breakdown voltage is about 3-4 times of alumina ceramic. Therefore, boron nitride tubes could be used as good insulators. By the way, boron nitride tubes also have high temperature resistance and good thermal shock resistance, they can work up to 2100 ℃ under atmosphere protection and 1900 ℃ under vaccum, cracks will not happen even when big temperature changes happen. Boron nitride tubes have low hardness and cannot be used in wear resistance jobs or applications with strong force impact.

Any inquiry please email info@mascera-tec.com or call +86 13860446139

HBN Boron Nitride Ceramic Tube

Product Information
Item No.
MSJ/BN006
Materialhot pressed boron nitride (BN99 type)
Density1.95-2.0g/cm3
Shapeceramic tube
Colorlight grey
Sizecustomized
Surface roughnessfine grinding
MOQ10 pcs per type
Application
ceramic insulator parts


Boron nitride tubes made of hot pressed boron nitride ceramics have good electrical insulation, the breakdown voltage is about 3-4 times of alumina ceramic. Therefore, boron nitride tubes could be used as good insulators. By the way, boron nitride tubes also have high temperature resistance and good thermal shock resistance, they can work up to 2100 ℃ under atmosphere protection and 1900 ℃ under vaccum, cracks will not happen even when big temperature changes happen. Boron nitride tubes have low hardness and cannot be used in wear resistance jobs or applications with strong force impact.


Mascera offers tailor-made boron nitride tubes in custom size with high accuracy machining. Except for pure BN99 boron nitride tubes, we also supply boron nitride  composites with silicon carbide, calcium borate, aluminum nitride and zirconia, to fulfill various of demand for the customers.




Main properties of boron nitride tubes


  • Low density

  • High electrical resistivity

  • High breakdown voltage resistance

  • High thermal conductivity

  • Low thermal expansion coefficient

  • Good thermal shock resistance 

  • High working temperature in vacuum and gas protection condition

  • Good corrosion resistance

  • Non-wetting with metals (without oxidization)

  • Good Machinability  



Typical applications of hot pressed 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



Material Data Sheet


Material TypeBN-997
BN-99BN-ABN-BBN-CBN-DBN-E

Main Content

BN>99.7%

BN>99%

BN+AL+SI

BN+ZR+AL

BN+SIC

BN+ZRO2

BN+AlN

Color

White

White

Light Grey

Light Grey

Grey Green

Dark Grey

Grey Green

Density (g/cm3)

1.6

1.95-2.0

2.2-2.3

2.25-2.35

2.4-2.5

2.8-2.9

2.8-2.9

Flexural Strength (Mpa)

18

30

65

65

80

90

90

Compressive Strength (Mpa)

45

85

145

145

175

220

220

Electrical Resistivity (Ω.Cm)

>1014

>1014

>1013

>1013

>1012

>1012

>1013

Max. Service Temp. (℃) 

@Air Condition

900

900

900

900

900

900

900

Max. Service Temp. (℃) @Vacuum Condition

1800

1800

1750

1750

1800

1800

1750

Max. Service Temp. (℃) 

@Inert Gas Condition

2100

2100

1750

1750

1800

1800

1750

Thermal Conductivity (W/Mk)

35

40

35

35

45

30

85

Thermal Expansion Coefficient (25 - 1000℃) (10-6/K)

1.5

1.8

2.0

2.0

2.8

3.5

2.8



Performance comparison of boron nitride ceramics and alumina ceramics:


Compared with alumina ceramics, boron nitride ceramics have the following advantages:


1. Boron nitride ceramic has maximum working temperature under atmosphere protection up to 2100 degrees, and alumina ceramic does not exceed 1700 degrees.

2. The thermal shock resistance of boron nitride ceramic is much better than alumina ceramic, boron nitride ceramic will not crack when unergoing rapid temperature rise or fall, it will not crack if it is taken out of the 1000 celsium degree furnace and blowed and quenched continuously for 100 times. Alumina ceramic is easy to crack when working temperature rises or falls quickly.

3. Electrical insulation strength of boron nitride ceramic is 3-4 times that of alumina ceramic.

4. Boron nitride ceramic does not react or bond with moleten glasses or metals, are used as containers for high-temperature sintering or melting crucibles, setter plates, etc.


Compared with alumina ceramics, the disadvantages of boron nitride ceramics are:


1. The strength, hardness and wear resistance of boron nitride ceramics are lower than that of alumina ceramic, and it is not suitable for use under vibration and friction conditions.

2. The use temperature of boron nitride ceramics in the air is only 1000 celsium degrees, and it will oxidize if it exceeds 1000 degrees. 



Available shapes of hot pressed boron nitride


  1. Ceramic rod / ceramic pin

  2. Ceramic tube / ceramic bushing / ceramic sleeve

  3. Ceramic ring / ceramic washer / ceramic spacer 

  4. Ceramic disc

  5. Ceramic plate / ceramic block

  6. Ceramic nozzle

  7. Ceramic crucible

  8. Other custom ceramic parts



Packing & Shipment


Package typecarton box with foam protection
Payment terms

TT / Western Union / Paypal

50% payment in advanced and 50% before shipment

Loading port Xiamen, China
Shipping wayBy sea / air / door-to-door express

boron nitride sleeve

boron nitride bushing



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