Machinable boron nitride

Boron nitride, machinable ceramic


Final Advanced Materials provides machinable boron nitride ceramic. We can provide rods, boards or machine parts according to your drawings.


Boron nitride presentation


Boron nitride is a white solid material in the as produced hot pressed form. It is a low porosity solid. It is easily machined into complex shapes using standard carbide tooling. The material is anisotropic in its electrical and mechanical properties due to the hexagonal crystals and their orientation during the hot press consolidation.

Due to the densification method used, the physical properties of the material are different according to the perpendicular and parallel axis to the direction of sintering. Boron nitride is non toxic.

3 available grades :
 - NB, Boron Nitride with binder, machinable
 - NB HP, high purity Boron Nitride without binder, machinable
 - NB HD, high density Boron Nitride, sintered


Boron nitride main properties

  • High thermal conductivity
  • Low thermal expansion
  • Excellent thermal shock resistance
  • High electrical resistance
  • Low dielectric constant and loss tangent
  • Chemically inert
  • Microwave transparency
  • Easily machined – non abrasive and lubricious


Boron nitride application

  • Plasma arc insulators
  • High temperature furnace fixtures and supports
  • Vacuum melting crucibles
  • CVD crucibles
  • Electronic parts- heat sinks, substrates, coil forms, prototypes
  • Low friction seals
  • Microcircuit packaging

Unit

Final®BN

Final®BN HP

Final®BN HD2

Composition

hBN

hBN

hBN

Structure

anisotropic

anisotropic

anisotropic

Purity

% BN

~91.6 - 96.1

~99.3

~98.9

Binder

Calcium borate and boron oxide

-

Boron oxide

Volumic mass

g/cm³

2

1.9

2.06

Max. temp. in oxidising atmospheres

°C

850

850

Max. temp. in inert atmospheres

°C

1150

2000

1600

Direction of application of pressure

ǁ

^

ǁ

^

ǁ

^

Thermal conductivity at 25°C

W/mK

27

29

78

130

92.7

57.2

Thermal dilatation coefficient

800-1200°C

800-1200°C

1200-1600°C

1200-1600°C

20-1500°C

20-1500°C

10-6K-1

1.5

0.9

0.9

0.3

7.54

2.12

Flexural strength at 25°C

MPa

59

45

22

21

25.5

47.9

Young module

GPa

40

60

17

71

35

50

Compressive strength

MPa

30

48

18

23

Electrical resistivity at 20 °C

Ohm.cm

>1014

>1015

> 1014

> 1015

>1013

>1013

Electrical rigidity

kV/mm

>10

79

>50

Applications

Vacuum furnace insulator, high-temperature insulator

Vacuum furnace insulator, high-temperature insulator, atomising nozzle, electrical insulation

Vacuum furnace insulator, high-temperature insulator


Specific boron nitride products

Unité

Final®BN P

Final®BN C

FinaBN I

Final®BN Z20

Final®BN Z40

Final®BN Z40D

Final®BN S

Final®BN A

Composition

 

hBN

hBN

hBN

hBN+SiC+ZrO2

hBN+SiC+ZrO2

hBN+SiC+ZrO2

hBN+SiO2

hBN+AlN

Structure

 

anisotropic

anisotropic

isotropic

anisotropic

anisotropic

anisotropic

anisotropic

anisotropic

 

Binder

 

-

Calcium borate

-

-

Boron oxide

Boron oxide

-

Boron oxide + calcium borate

Volumic mass

g/cm³

1.9

2.0

2.0

2.4

2.9

2.9

2.2

2.5

Max. temp. in oxidising atmospheres

°C

900

900

900

900

900

900

900

1100

Max. temp. in inert atmospheres

°C

2300

1600

2300

1800

1800

1800

1500

1600

Direction of application of pressure

ǁ

^

ǁ

^

ǁ

^

ǁ

^

ǁ

^

ǁ

^

ǁ

^

ǁ

^

Thermal conductivity at 20˚C

W/mK

20

30

33

35

25

28

45

28

38

24

34

10

30

30

40

Thermal dilatation coefficient 20-1500°C

10-6K-1

1.0

0.5

4.0

3.0

3.0

4.5

3.0

8.0

4.0

6.0

4.0

3.0

0.1

5.6

5.4

Flexural strength at 25°C

MPa

15

18

35

40

30

40

70

80

120

107

144

35

65

80

105

Young module

GPa

11

14

25

30

23

20

35

30

45

50

71

75

85

40

60

Compressive strength

MPa

27

22

60

52

45

140

60

240

120

280

160

130

50

190

185

Electrical resistivity at 20°C

Ohm.cm

>1012

>1012

>1012

>1012

>1012

-

>1014

>1015

Applications

 

Temp. > 1600°C e.g. furnace structures

Max. temp. ~1600°C e.g. PVD, furnace structures

Very high-temperature processes > 1800°C e.g. capillary tubes, thermocouples

Temp. < 1800°C e.g. casting nozzles, molten metal crucibles

Temp. < 1800°C e.g. casting nozzles, molten metal crucibles

Temp. < 1800°C e.g. special applications, steel industry

Max. temp. 1500°C e.g. PVD

Glass industry

Boron Nitride BN (239.65k)

Technical data sheet