Boron Nitride Tube

Boron Nitride Tube HM

Boron Nitride Tube

Material Grade: Grade A, Grade AX05, Grade HP, M/M26, ZSBN, HMBN 1000, HMBN2000, HMBN3000, HMBN4000, HMBN5000, etc.

  • Custom sizes and standard sizes in stock
  • Quick Lead Time
  • Competitive Price

  • Boron Nitride Tube is made of hot-pressed boron nitride ceramic with excellent electrical insulation, thermal stability, and chemical inertness. As a leading supplier and manufacturer of premium boron nitride products, we can supply high-quality boron nitride tubes with various specifications and competitive prices, offering customized solutions to meet specific requirements.
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Boron Nitride Tube Data Sheet

Reference:

HM1308

Material Grade:

Grade A, Grade AX05, Grade HP, M/M26, ZSBN, HMBN 1000, HMBN2000, HMBN3000, HMBN4000, HMBN5000, etc.

Color:

White

Melting Point:

2937 ℃

Density

1.9-2.2 g/cm3

Dielectric Constant:

4.3

Boron Nitride Tube

Boron Nitride Tube is made from high-purity boron nitride powder by an advanced vacuum hot press sintering process. It has excellent electrical insulation with a breakdown voltage approximately 3-4 times higher than that of alumina ceramics. Additionally, boron nitride tube offers high-temperature resistance and excellent thermal shock resistance, with operating temperatures reaching up to 2100 ℃ in a protective atmosphere and 1900 ℃ in vacuum. They will not crack even with significant temperature fluctuations. However, boron nitride tube has low hardness and are not suitable for wear-resistant applications or environments subject to strong impact. With customizable options for diameter, length, and wall thickness, boron nitride tubes are suitable for various applications across research and industry sectors. Advanced Ceramics Hub can also supply boron nitride products with high purity and different additives based on specific requirements.

  • Boron Nitride Tube HM 1
  • Boron Nitride Tube HM 3
  • Boron Nitride Tube HM 2

Boron Nitride Tube Advantages

  • Low density
  • High resistivity
  • High breakdown voltage
  • High thermal conductivity
  • Low coefficient of thermal expansion
  • Good thermal shock resistance
  • High working temperature under vacuum and gas protection
  • Good corrosion resistance
  • No wetting with metals (no oxidation)
  • Good machinability

Boron Nitride Tube Applications

  • Electrical Insulation: Boron nitride tube is widely used as electrical insulators applied in areas where high voltage and high temperature conditions are present.
  • High-temperature Applications: Boron nitride tube is commonly used in high-temperature applications, such as in furnaces, heating elements, and crucibles for metal melting.
  • Thermal Shock Resistance: Boron nitride tube can withstand rapid temperature changes without cracking, making them ideal for applications in harsh thermal environments, such as aerospace and metallurgy.
  • Chemical and Mechanical Industries: Boron nitride tube can be used in the chemical industry, particularly in reactors and containers for handling reactive materials, providing an inert environment for certain chemical processes.
  • Semiconductor and Optoelectronics Industry: Boron nitride tube can provide an ideal substrate material for high-performance devices in semiconductor and optoelectronic applications.
  • Aerospace Applications HM 1
    Aerospace
  • Electric and Electrical Equipments HM
    Electrical and Electronic Area
  • High temperatuer furnaces applications HM 1
    High-temperature Furnaces
  • Semiconductor Applications HM
    Semiconductor Manufacturing

Boron Nitride Material Properties

Items

Unit

Grade A

Grade AX05

Grade HP

Grade M26

Grade ZSBN

HMBN1000

HMBN2000

HMBN3000

HMBN4000

HMBN5000

Density

g/cm3

2.0

1.9

2.0

2.1

2.9

1.9

2.1

1.9

1.85-2.05

2.0

Compressive Strength

MPa

143 ∥ / 186 ⊥

25 ∥

96 ∥

–

219 ∥ / 254 ⊥

40 ∥ / 40 ⊥

312 ∥ / 312 ⊥

24 ∥

95 ∥

–

Flexural Strength

MPa

94 ∥ / 65 ⊥

22 ∥ / 21 ⊥

59 ∥ / 45 ⊥

62 ∥ / 34 ⊥

144 ∥ / 107 ⊥

13 ∥ / 29 ⊥

>49

21 ∥ / 20 ⊥

58 ∥ / 44 ⊥

61 ∥ / 33 ⊥

Young’s Modulus

GPa

47 ∥ / 74 ⊥

17 ∥ / 71 ⊥

40 ∥ / 60 ⊥

–

–

–

–

45 ∥ / 73 ⊥

39 ∥ / 58 ⊥

–

Poisson’s Ratio

MPa

94 ∥ / 65 ⊥

22 ∥ / 21 ⊥

59 ∥ / 45 ⊥

62 ∥ / 34 ⊥

144 ∥ / 107 ⊥

14 ∥ / 30 ⊥

< 50

20 ∥ / 20 ⊥

50 ∥ / 50 ⊥

50 ∥ / 50 ⊥

Items

Unit

Grade A

Grade AX05

Grade HP

Grade M26

Grade ZSBN

HMBN1000

HMBN2000

HMBN3000

HMBN4000

HMBN5000

Thermal Conductivity

W/mK

30 ∥ / 34 ⊥

78 ∥ / 130 ⊥

27 ∥ / 29 ⊥

11 ∥ / 29 ⊥

24 ∥ / 34 ⊥

21 ∥ / 21 ⊥

–

73 ∥ / 128 ⊥

27 ∥ / 29 ⊥

11 ∥ / 26 ⊥

Max Temp (Oxidizing) 1

°C

850

850

850

1000+

850

850

850

850

850

1000

Max Temp (Inert) 1

°C

1200

2000

1150

1000+

1600

20005.5 ∥ / 1 ⊥

1000

2000

1200

1000

CTE2 25°C ➞ 400°C

10-6/K

3.0 ∥ / 3.0 ⊥

-2.3 ∥ / -0.7 ⊥

0.6 ∥ / 0.4 ⊥

3.0 ∥ / 0.4 ⊥

4.1 ∥ / 3.4 ⊥

–

–

-2.3 ∥ / -0.7 ⊥

0.6 ∥ / 0.4 ⊥

3.0 ∥ / 0.4 ⊥

CTE2 400°C ➞ 800°C

10-6/K

2.0 ∥ / 1.4 ⊥

-2.5 ∥ / 1.1 ⊥

1.1 ∥ / 0.8 ⊥

2.5 ∥ / 0.1 ⊥

5.6 ∥ / 4.3 ⊥

–

–

-2.5 ∥ / 1.1 ⊥

1.1 ∥ / 0.8 ⊥

5.6 ∥ / 4.3 ⊥

CTE2 800°C ➞ 1200°C

10-6/K

1.9 ∥ / 1.8 ⊥

1.6 ∥ / 0.4 ⊥

1.5 ∥ / 0.9 ⊥

3.0 ∥ / 0.1 ⊥ 

7.2 ∥ / 5.2 ⊥ 

–

–

1.6 ∥ / 0.4 ⊥

1.5 ∥ / 0.9 ⊥

7.2 ∥ / 5.2 ⊥

CTE2 1200°C ➞ 1600°C

10-6/K

5.0 ∥ / 4.8 ⊥

0.9 ∥ / 0.3 ⊥

2.8 ∥ / 2.7 ⊥

–

4.6 ∥ / 3.4 ⊥

–

–

0.9 ∥ / 0.3 ⊥

2.8 ∥ / 2.7 ⊥

4.6 ∥ / 3.4 ⊥

CTE2 1600°C ➞ 1900°C

10-6/K

7.2 ∥ / 6.1 ⊥

0.5 ∥ / 0.9 ⊥

–

–

–

–

–

0.5 ∥ / 0.9 ⊥

–

–

CTE2 25°C ➞ 1000°C

10-6/K

–

–

–

–

–

5.5 ∥ / 1 ⊥

2.5 ∥ / 2.0 ⊥

–

–

–

Items

Unit

Grade A

Grade AX05

Grade HP

Grade M26

Grade ZSBN

HMBN1000

HMBN2000

HMBN3000

HMBN4000

HMBN5000

Dielectric Strength

kV/mm

88

79

>10

66

3.5

>40

–

>40

>40

>40

Dielectric Constant

1 MHz

4.6 ∥ / 4.2 ⊥

4.0 ∥ / 4.0 ⊥

4.3 ∥ / 4.0 ⊥

4.5 ∥ / 3.8 ⊥

18 ∥ / 19 ⊥

–

–

4.0 ∥ / 4.0 ⊥

4.3 ∥ / 4.0 ⊥

4.5 ∥ / 3.8 ⊥

Dissipation Factor

1 MHz

1.2-3 ∥ / 3.4-3 ⊥

1.2-3 ∥ / 3.0-3 ⊥

1.5-3 ∥ / 2.1-3 ⊥

1.7-3 ∥ / 6.7-3 ⊥

4.5-2 ∥ / 6.7-2 ⊥

–

–

1.2 -3 ∥ / 3.0 -4 ⊥

1.5 -3 ∥ / 2.1 -3 ⊥

1.7 -3 ∥ / 6.7 -3 ⊥

Volume Resistivity @25°C

ohm-cm

>1013 ∥ / 1014 ⊥

 >1013 ∥ / 1014 ⊥

 >1013 ∥ / 1013 ⊥

 >1013 ∥ / 1014 ⊥

 >1013 ∥ / 1012 ⊥

>1014 

–

 >1013 ∥ / 1014 ⊥

 >1013 ∥ / 1013 ⊥

 >1013 ∥ / 1014 ⊥

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Grade ZSBN Applications:

  • Break rings for continuous casting of metals
  • Components
  • Crucibles
  • Deck plates
  • Heat treatment fixtures
  • High temperature bearings
  • High temperature mechanical components
  • High temperature valves
  • Jigs
  • Molds
  • Molten metal and glass castings
  • Muffles
  • Nozzles for transfer or atomization
  • Side dams
  • Spacers

HMBN1000 is a high-purity, hot-pressed boron nitride designed for demanding high-temperature applications. It offers low thermal expansion, excellent thermal shock resistance, and superb thermal conductivity. With good chemical resistance to molten metal and glass, it also provides low friction and electrical insulation with high dielectric strength. Easily machinable, HMBN1000 is ideal for applications requiring minimal binder, and can be produced up to 300mm in diameter and length.

HMBN1000 Applications:

  • Electric propulsion discharge channels for Hall Effect Thrusters
  • Setter plates for high temperature furnaces
  • Crucibles for molten glass and metals
  • Electrical insulators for high temperatures and high voltages
  • Vacuum feedthroughs
  • Plasma chamber lining and fittings
  • Nozzles for non-ferrous metals and alloys
  • Thermocouple protection tubes and sheaths
  • Laser supports

HMBN2000 is a hot-pressed boron nitride/silica composite known for its excellent dielectric performance, insulation, and thermal shock resistance. It offers low thermal expansion and good flexural strength, while being easily machinable.

HMBN2000 Applications:

  • Electric propulsion discharge channels for Hall Effect Thrusters
  • Plasma/corona insulators
  • Plasma constraints in PVD systems
  • Wear and corrosion resistance
  • Ultra high vacuum insulators

HMBN3000 is a high-purity, binder-free hot-pressed boron nitride designed for demanding high-temperature applications. It features very low thermal expansion, superb thermal shock resistance, excellent thermal conductivity, and minimal thermal cycling. Easily machinable to tight tolerances, it offers good chemical resistance to molten metals and low friction. Non-reactive with graphite and refractory metals up to 2000°C, it also provides high dielectric strength and electrical resistivity. Ideal for high-temperature applications, HMBN3000 can be machined from large billets up to 490mm x 490mm x 400mm.

HMBN3000 Applications:

  • Setter plates for high temperature furnaces
  • Crucibles for non-oxide ceramics, phosphors, and metals
  • Electrical insulation for extremely high temperatures and high voltages
  • Components exposed to molten salts
  • Hall Effect Thruster insulators
  • Nozzles for non-ferrous metals and alloys
  • Thermocouple protection tubes and sheaths
  • Laser supports

HMBN4000 is a strong, hard, hot-pressed boron nitride designed for demanding applications. It offers low thermal expansion, excellent thermal shock resistance, and good thermal conductivity. This economical hexagonal Boron Nitride grade is easily machinable to tight tolerances, with low thermal cycling and chemical resistance to molten metals up to 1000°C. Its lubricity provides low friction, and it retains high dielectric strength and electrical resistivity up to 1000°C. HMBN4000 is ideal for applications requiring strength, and can be machined from large billets up to 490mm x 490mm x 400mm.

HMBN4000 Applications:

  • Setter plates for furnaces
  • Crucibles for non-oxide ceramics, phosphors, and metals
  • Electrical insulation for high temperatures and high voltages
  • Components exposed to molten salts
  • Nozzles for non-ferrous metals and alloys
  • Thermocouple protection tubes and sheaths

HMBN5000 is a high-purity, hot-pressed boron nitride with a silica matrix, offering excellent machinability, moisture resistance, and high fracture toughness. This versatile grade features low thermal shock, with the ability to exceed temperature limits for short periods without damage. It maintains its shape and properties after cooling and can be machined from large billets up to 490mm x 490mm x 400mm. HMBN5000 also provides outstanding electrical insulation, with high dielectric strength and resistivity up to 1000°C, making it ideal for demanding applications.

HMBN5000 Applications:

  • Microwave components
  • Electrical insulation for high temperatures and high voltages
  • Hall Effect Thruster insulators