Pyrolytic Boron Nitride tube and other pyrolytic boron nitride products are synthesized on the mold by chemical vapor deposition (CVD) process, with BCl3 and NH3 at high temperature and low pressure. PBN products are extremely pure, as the purity of gas material is easier to control. Typically, PBN products have a total impurity of <100 ppm, which means the purity is no less than 99.99%. With such a high purity level, PBN Tubes are ideal products for semiconductor industries & vacuum systems.

PBN combines high electrical resistance and thermal conductivity, making it an excellent choice for applications requiring superior strength, low coefficient of thermal expansion, and resistance to thermal shock. Non-hazardous, non-porous, and extremely pure, PBN can be used as a coating or deposit on graphite and then easily processed into 2D or 3D shapes for use as crucibles, boats, plates, wafers, tubes, and bottles. Known for its directional thermal conductivity and ability to provide optimal heat dissipation, PBN exhibits greater temperature stability at temperatures up to 1700°C, can resist thermal shock, and when coated on graphite, protects against corrosive atmospheres, including most molten metals (aluminum, silver, copper, Ga, Ge, Sn, etc.), acids and hot ammonia environments.

Pyrolytic Boron Nitride Specification

Item

Units

Values

Purity

%

99.99-99.999

Density

g/cm3

1.95-2.20

Tensile Strength

MPa

112

Bending Strength

MPa

173

Compression Strength

MPa

154

Young’s Modulus

GPa

18

Thermal Conductivity

W/m°C

“a” 60,  “c” 2

specific heat capacity

J/g·℃

0.90(RT)

Resistivity

Ω.cm

2×1015

Dielectric Constant

 

“c” 3.07

Metal Impurity Content

ppm

<10

PBN Tube Applications

PBN Tube from Edgetech Industries Ceramics Division can withstand high temperatures in a high vacuum environment, it has excellent corrosion resistance and electrical resistance. Based on the above excellent properties, Pyrolytic Boron Nitride Tube is an ideal choice in a wide range of industries, such as:

-Satellite communication microwave tube

-PBN-coated carrier plate

-Insulation panels for high temperature and high vacuum equipment

-Metal evaporation and molten metal processing equipment, such as OLED electrodes and CIGS solar cell processing equipment

Packing

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