High-purity boron nitride tube has a higher temperature resistance in a vacuum than low-purity boron nitride tubes. Edgetech’s high-purity boron nitride products can typically withstand temperatures up to 2100°C. The BN tube can be used in a variety of applications, including the treatment of molten metals, and in the treatment of high-purity metals. Because of its low wettability with metals, BN is an excellent material for working with molten metals, especially high-purity metals in a vacuum. Our equipment can produce typical BN tubes up to 12 inches in diameter and length. Boron nitride tubes can be joined with flat or threaded fittings to create longer boron nitride tubing. 

Boron Nitride Tube Basic Information & Materials

material

BNH99, BN99, BN-ZS, BN-AlN

Molecular

24.82

Melting Point

2700 °C

Appearance

White/White Graphite/Greyish Green

Density, g/cm3

2.1 g/cm3

Solubility in H2O

insoluble

Electrical Resistivity, Ω·m

>1012

Dimensions

Length: 10~400mm, ID: >2mm

Boron Nitride Materials

Material

Description

BN99

Hot pressed at high temperature (1900℃).
Excellent corrosion resistance and thermal conductivity, Limited wear resistance
Self-bonded and high purity (>99%)

BNBO

General-purpose material
Bonded by boric oxide

BNCB

Calcium borate bonded boron nitride
Enhanced moisture resistance

BN60

BN 60%, SiO2 40%

BN40

BN 40%, SiO2 60%

BN-ZS

BN-45%, Zr2O3 45%

BN-AlN

BN+AlN

Boron Nitride Tube Advantages & Applications:

-Low wettability to molten metal

-Relatively high thermal conductivity and low thermal expansion

-Higher thermal shock resistance

Based on the above properties, Boron Nitride Tube is an ideal choice in a wide range of industries, such as:

-Insulator tube for high-temperature furnace

-Parts for melting metals or glass

-High temperature supports parts

-Transport pipes for Melting metal

-Electric insulators in vacuum system

Packing

As a ceramic material, boron nitride is quite fragile in a lot of cases. Our Hot-Pressed Boron Nitride Tube is carefully handled to minimize damage during storage and transportation. Suitable outer boxes and inner cushioning materials are used for BN products, vacuum packing is also engaged for some of the parts.