Boran nitride (BN) (technical)

Boran nitride (BN) (technical)

IMG_4657.jpegBoron nitride is a ceramic material that is characterized by relatively high thermal conductivity (can reach up to 90 W / m * K) and resistance to high temperatures. Unlike other ceramic materials, the operating temperature can reach up to 2100 C in a vacuum and an inert environment and 1000 C in an oxygen environment. The material also belongs to the group of refractory materials due to the described properties.

Specifications

Properties

Conditions

Unit

Type

Colour

 

 

белый

белый

белый

белый

белый

белый

белый

Bulck density

 

г/см3

≥ 2,20

≥ 2,25

≥ 2,40

≥ 2,80

≥ 2,80

≥ 2,30

≥ 2,63

Water absorption

%

 

 

 

 

 

0

0

 

 

 

 

 

 

 

 

 

 

Flexural strength

 

МПа

65

65

80

90

90

≥ 600

≥ 320

Compressive strength

 

МПа

145

145

175

220

220

150

≥ 1000

Modulus of elasticity

 

ГПа

62

55

Poisson 's Ratio

 

 

0,2

Hardness

 

кг/мм2

1100

1224

Fracture toughness

 

МПа∙м1/2

5,4

≥ 482

 

 

 

 

 

 

 

 

 

 

Coefficient of thermal expansion

25-1000 °C

10-6 /°C

2,0

2,0

2,8

3,5

2,8

1,9

5,2

20-800 °C

10-6 /°C

 

 

 

 

 

1,9

5,2

40-800 °C

10-6 /°C

 

 

 

 

 

 

 

Thermal conductivity

Вт/м∙K

35

35

45

30

85

35

90

25 °C

Вт/м∙K

 

 

 

 

 

35

90

100 °C

Вт/м∙K

 

 

 

 

 

35

90

Maximum operating temperature

 

°C

 

 

 

 

 

1000

900

в O2

°C

1000

1000

1000

1000

1000

1000

900

в вакууме

°C

1750

1800

1800

1800

1800

в инертных газов

°C

1750

1800

1800

1800

1800

Dielectric constant

1 МГц

 

 

 

 

 

6,8

7,3

Volumetric resistance

25 °C

Ом∙см

≥ 1013

≥ 1013

≥ 1012

≥ 1012

≥ 1013

≥ 1013

≥ 1014

300 °C

Ом∙см

 

 

 

 

 

 

 

500 °C

Ом∙см

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Thick film

нет

Thin film

 

 

да

Application area

  • turbine parts (blades, etc.);
  • furnace parts;
  • snap-in;
  • enclosures;
  • any products operating at elevated temperatures (more than 1000 C).

See also