Machinable boron nitride

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 |
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Composition |
hBN |
hBN |
hBN |
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Structure |
anisotropic |
anisotropic |
anisotropic |
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Purity |
% BN |
~91.6 - 96.1 |
~99.3 |
~98.9 |
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Binder |
Calcium borate and boron oxide |
- |
Boron oxide |
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Volumic mass |
g/cm³ |
2 |
1.9 |
2.06 |
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Max. temp. in oxidising atmospheres |
°C |
850 |
850 |
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Max. temp. in inert atmospheres |
°C |
1150 |
2000 |
1600 |
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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 |
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Electrical resistivity at 20 °C |
Ohm.cm |
>1014 |
>1015 |
> 1014 |
> 1015 |
>1013 |
>1013 |
Electrical rigidity |
kV/mm |
>10 |
79 |
>50 |
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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 |
Final®BN I |
Final®BN Z20 |
Final®BN Z40 |
Final®BN Z40D |
Final®BN S |
Final®BN A |
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Composition |
|
hBN |
hBN |
hBN |
hBN+SiC+ZrO2 |
hBN+SiC+ZrO2 |
hBN+SiC+ZrO2 |
hBN+SiO2 |
hBN+AlN |
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Structure |
|
anisotropic |
anisotropic |
isotropic |
anisotropic |
anisotropic |
anisotropic |
anisotropic |
anisotropic |
||||||||
Binder |
|
- |
Calcium borate |
- |
- |
Boron oxide |
Boron oxide |
- |
Boron oxide + calcium borate |
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Volumic mass |
g/cm³ |
1.9 |
2.0 |
2.0 |
2.4 |
2.9 |
2.9 |
2.2 |
2.5 |
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Max. temp. in oxidising atmospheres |
°C |
900 |
900 |
900 |
900 |
900 |
900 |
900 |
900 |
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Max. temp. in inert atmospheres |
°C |
2300 |
1600 |
2300 |
1800 |
1800 |
1800 |
1500 |
1600 |
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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 |
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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 |