2021hot pressed Boron Nitride Crucible Boron Nitride Crucible BN Boron Nitride Crucible For Melting

Ceramic Crucible

Ivory

Boron ceramic

Customerized

Boron Nitride ceramic are made by hot pressing hexagonal Boron Nitride powders. The color of BN products is milky, true density is
2.27g/cm, Mohs value is 2, they have a high melting point (sublimate point is 3000°C). When in a condition of inert atmosphere,
their maximum service temperature can reach to 2800°C. Their thermal conductivity is 25W/(m·K), similar to stainless steel. And
coefficient of liner, and coefficient of liner expansion is between 2.0×10 /°C to 6.5×10 /°C.We can also customize it according to
your requirements.

95%/99%/99.7% Al2O3 Boron Ceramic Material Parameters

Memo

Item

Test Condition

95% Al2O3 Ceramic

99% Al2O3 Ceramic

99.7% Al2O3 Ceramic

Bulk Density (g/cm³)

>3.6

3.89

3.96

Maximum Use Temp(℃)

1450

1600

1650

Water Absorption(%)

0

0

0

ROHS Hardness

≥85

≥89

≥89

Flexural Strength
MPa(psi×10³)

20℃

358(52)

550

550

Compressive Strength
MPa(psi×10³)

20℃

2068(300)

2600(377)

2600(377)

Fracture Toughness
Mpa m½

K(l c)

4-5

5.6

6

Thermal Expansion
Coefficient(1×10-6/℃)

25-1000℃

7.6

7.9

8.2

export,thick

Thermal Conductivity
Coefficient(W/m°K)

20℃

16

30.0

30.4

export,thin

Thermal Shock
Resistance(℃)

△Tc

250

200

200

export,thin

Dielectricity Constant

1MHz.25℃

9

9.7

9.7

export,Bilateral

Dielectric Strength
(ac-kV/mm)(ac V/mil)

8.3(210)

8.7(220)

8.7(220)

export,Bilateral

Volume Resistivity
(ohm-cm)

100℃

>1013

>1014

>1014

export,thick

90

84

165

150

55

export,thin