Hexagonal Boron Nitride (HBN) Product

The hexagonal boron nitride is a white crystal, with a melting point of nearly 3000 ℃, high-temperature resistance, extremely stable chemical performance, strong acid corrosion resistance, and a very high electric insulation performance.

Hexagonal Boron Nitride (HBN) Product There are no products in this category.

Hexagonal boron nitride (h-BN) is mainly used in refractory materials, semiconductor solid-phase doped sources, structural materials of atomic piles, packaging materials against neutron radiation, rocket engine composition, high-temperature lubricants, and mold agents. Fibers processed with boron nitride can be used as inorganic synthetic engineering materials, widely used in aerospace and defense industries. Cube boron nitride can also be used as a deep well drill bit and high-speed cutting tool.

Hot-pressed Boron Nitride Typical Physical Properties

Physical Properties

HBN

HBR

HBC

HBT

B+N, %

>95

>94

>99

>99

Binder

Boric Oxide

Calcium Borate

None

None

Binder Melting Point, ℃

550

1150

--

--

Maximum Recommended Operating Temperature

Oxidizing Atmosphere, ℃

Inert/Vacuum Atmosphere, ℃

 

550-850

550-1600

 

850

1150-1600

 

850

2000-3000

 

850

2000-3000

Density, g/cm3

Minimum

Typical

 

2.00

2.10

 

1.90

2.00

 

1.90

1.95

 

1.70

1.75

Porosity, %

7

11

13

22

Hardness, Knoops (KHN, 100g)

19

20

16

11

Specific Heat, J/kg-K (Cal/g℃)

@25℃

@700℃

 

808(.193)

1846(.441)

 

808(.193)

1846(.441)

 

808(.193)

1846(.441)

 

808(.193)

1846(.441)

Pressing Direction

        

        

        

        

Thermal Conductivity, W/m·K

@25 ℃

@500 ℃

 

59     33

33     25

 

55     33

33     25

 

28     33

30     24

 

22     19

21     17

Coefficient of Thermal Expansion, ppm/℃

25 ℃ to 1500 ℃

 

4     6

 

3     4

 

0.4     0.8

 

0.1     0.3

Flexural Strength, MPa (psi×102)

@25 ℃

 

@1500 ℃

 

 

89.6    75.8

(13)     (11)

26.8     20.6

(3.9)     (3)

 

51.7     41.3

(7.5)     (6)

21.3     18.6

(3.1)     (2.7)

 

20.6     17.2

(3)       (2.5)

48.2     27.5

(7)       (4)

 

19.3     17.2

(2.8)     (2.5)

24.1     18.6

(3.5)     (2.7)

Modulus of Elasticity, GPa (psi×106)

77.9    62.7

(11.3)  (9.1)

62.0     48.2

(9)        (7)

48.2     20.6

(7)        (3)

41.3      20.6

(6)        (3)

Compressive Strength, MPa (psi×102)

110.3  124.1

(16)     (18)

68.9    62.0

(10)     (9)

41.3    51.7

(6)      (7.5)

33.1      38.6

(4.8)     (5.6)

Hot-pressed Boron Nitride Electrical Properties

Electrical Properties

HBN

HBR

HBC

HBT

Dielectric Strength, V/mm×102

53

53

54

34

Dielectric Constant

@1GHz

@9.3GHz

@1MHz

 

4.3

4.4

4.2

 

4.2

4.3

4.1

 

4.1

4.3

4.1

 

3.9

3.9

3.8

Loss Tangent

@1GHz

@9.3GHz

@1MHz

 

.0003

.0002

<.0002

 

.0003

.0002

<.0002

 

.0004

<.0002

<.0002

 

.0003

<.0002

<.0002

Volume Resistivity, ohm-cm

@25 ℃

@700 ℃

 

>1015

108

 

>1015

108

 

>1015

1010

 

>1015

1010