Boron  Nitride

 

Boron Nitride is an advanced synthetic ceramic material available in powder, solid, liquid and aerosol spray forms. Its unique properties - from high heat capacity and outstanding thermal conductivity to easy machinability and superior dielectric strength - making Boron Nitride a truly outstanding material. In its solid form, Boron Nitride can easily be machined to close tolerances in virtually any shape. After machining, it is ready for use without additional heat treating or firing operations.

In inert and reducing atmospheres, Boron Nitride will withstand temperatures over 2,000°C. It is not wet by most molten metals and slags and can therefore be used as a container for most molten metals including aluminium, cryolite, sodium, iron, steel, silicon, boron, tin germanium and copper.
Typical applications: Metals manufacturing, containment and processing; foundry applications.
 

Selection of Boron Nitride Powders

grade

unit

70-nano

205

410

400

100

120

12

630

482

particle size D50

µm

<0.07

0.5

< 1

5

4

4

7

8

13

purity

%

99.0

>98.5

> 98.5

> 98.5

> 90.0

> 98.5

> 98.0

> 98.0

>98.5

max. oxygen

%

0.7

1.0

1.2

1.5

5.0

1.5

1.5

2.0

0.5

max boron oxide

%

0.3

0.1

0.1

0.1

5.0

0.2

0.2

0.3

0.2

max. carbon

%

0.1

0.1

0.03

0.1

0.1

0.1

0.1

0.1

0.1

specific surface area

m2/g

60

16 - 26

20

16

7 - 13

5 - 12

4 - 6

25 – 30

4-6

bulk density (not comp.)

g/cm3

0.1

0.2

0.12

0.3

0.4

0.3

0.5

0.3

0.4

Typical areas of application

 

solid lubricant surface technologies
· plating · sintered metals 
· polymers · thermal spraying

 

 

 

 

 

release & lubricating agent
· cold  and  · hot metal forming

 

 

 

 

 

heat conductive filler
· polymers

 

 

 

 

 

 

heat conductive powder
· cartridge heaters  ·thermocouples · embedding of sinterparts

 

 

 

 

 

 

 

high performance additive
·oils  ·greases

 

 

 

 

Boron Nitride Sintered Components

Grade

 

D

P

S

C

O

O

A

Composition

 

BN

BN

BN

BN

BN + ZrO2

BN + SiO2

BN + AlN

Binder

 

n/a

n/a

boron oxide

Ca-borate

boron oxide

boron oxide

boron oxide

Density

g/cm3

2.1

ß 1.9 Þ

ß 2.0 Þ

ß 2.0 Þ

ß 2.9 Þ

ß 2.15 Þ

ß 2.45 Þ

flexural strength (4 point)

N/mm2

20

18

15

90

75

52

41

100

60

34

64

78

125

Compressive strength

N/mm2

40

36

30

125

110

69

62

240

128

no data available

Tthermal conductivity

room temperature (RT)

1000°C

 

W/mK

W/mK

 

50

20

 

28

 

19

 

60

 

33

 

55

 

38

 

35

21

 

25

16

 

11

6

 

29

16

 

30

 

40

Coeff. of thermal expansion

(RT to 1000°C)

 

10-6/K

 

4.4

 

1.0

 

2.0

 

4.0

 

6.0

 

3.0

 

4.0

 

5.0

 

7.0

 

2.5

 

0.1

 

5.4

 

5.6

Specific resistivity (RT)

W cm

>1014

>1014

>1014

>1014

>1012

>1015

>1015

max. service temperature

air

inert atmosphere

 

°C

°C

 

     900

~ 2500

 

   900

~2400

 

   900

~1800

 

   900

~1800

 

   900

~1800

 

   900

~1600

 

   900

~1800

                                   ß  property perpendicular to pressing direction      Þ property in line with pressing direction

 

 

 

Materials as listed are most typical compositions.
Please ask for your specific application.
Technical data only for orientation purposes and may vary from type to type.

 

 

 

 

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