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Boron Nitride Ceramic Tubes



Boron Nitride Ceramic Tubes



Boron nitride is a heat- and chemically resistant refractory compound of boron and nitrogen with the 

chemical formula BN.it is softer than diamond, but its thermal and chemical stability is superior.Because 

of excellent thermal and chemical stability, boron nitride ceramics are traditionally used as parts of high 

temperature equipment. Boron nitride has potential use in nanotechnology.


Chemical Composition and Physical Properties

Type

99HBN

HCBN

HABN

HZBN

Main Content

BN>99%

BN>98.5%

BN+AlN

BN+ZrO2

Binder

B2O3

CaB2O6

ALBO3

B2O3

Density    (g/cm3)

1.95-2.0

2.0-2.1

2.6

2.95

Flexural Strength    (Mpa)

30

100

200

200

Compressive Strength    (Mpa)

100

280

350

380

Electrical Resistivity    (ohm.cm)

>10^14

>10^13

>10^14

>10^12

Max. Working Temp.    (°C)

air

900

900

900

1000

inert gas

2400

2400

2100

1800

vacuum

2200

2200

1900

1800

Thermal Conductivity    (W/m.K)

20

35

50

30

Expansion Coefficient  25 - 1000 °C (10^-6/K)

1.5

2

4.5

2.5