CG MATERIAL
Boron Nitride Tube, BN Tube
Boron Nitride Tube, BN Tube
Boron Nitride Tube, also known as BN Tube, is a high-performance ceramic tube made from boron nitride (BN) powder. It is a white, highly crystalline material with a hexagonal lattice structure that gives it exceptional thermal and mechanical properties.
BN Tubes are produced using a hot-pressing process that involves applying heat and pressure to BN powder, resulting in a highly dense, uniform material with excellent strength and thermal conductivity.
BN Tubes are highly valued for their unique combination of properties, which include high thermal conductivity, excellent electrical insulation, low coefficient of friction, and resistance to thermal shock. These properties make BN Tubes ideal for use in high-temperature applications, such as furnace tubes, thermocouple protection tubes, and heating elements.
BN Tubes are also highly resistant to chemical attack and can withstand harsh chemical environments, making them an ideal material for use in chemical processing and semiconductor manufacturing.
BN Tubes are available in various sizes and lengths, ranging from thin-walled to thick-walled tubes, and can be customized to meet specific application requirements. They are also available in a range of shapes, including round, square, and custom shapes.
Boron Nitride Ceramics Specification
CG Material production formulations are developed to address the varied application problems in which ceramic components are commonly used. Many industrial applications push the envelope on specific requirements leading to the development of new formulations to successfully address them.
| Item No. | Description | Purity | Lot Size |
| CG-NI05-98 | Boron Nitride Powder Particle Size: 3 µm, 200 mesh or 325mesh |
BN > 98 %， B2O3 < 0.6%, Ca < 0.015%, Si < 0.12% |
100 kg 1000kg Customize |
| CG-NI05-99 | Boron Nitride Powder Particle Size: 3 µm, 200 mesh or 325mesh |
BN > 99 %， B2O3 < 0.4%, Ca < 0.01%, Si < 0.10% |
100 kg 1000kg Customize |
Comparison of Boron Nitride Ceramics
| Grade | BN-BO | BN-SZ | BN-AlN |
| Compositions | BN>98% | BN+SiC+ZrO2 | BN+AIN |
| Binder | B2O3 | / | AlBO3 |
| Density | 2.1-2.2 g/cm3 | 2.3-3.0 g/cm3 | 2.5-2.6 g/cm3 |
| 25°C Volume Resistivity | >1013 Ω·cm | >1012 Ω·cm | >1014 Ω·cm |
| Max. Service Temp. (°C) Oxygen; Inert Gas; High Vacuum |
900 2000 1800 |
900 1700 1700 |
900 2100 1900 |
| Flexural Strength | 75 Mpa | 100 Mpa | 130 Mpa |
| Compressive Strength | 100 Mpa | 300 Mpa | 250 Mpa |
| Coefficient of Thermal Expansion 25-1000°C |
2.0 x 10–6/K | 4.0 x 10–6/K | 4.5 x 10–6/K |
| Thermal Conductivity | 30 W/mK | 40 W/mK | 60 W/mK |
Boron Nitride Tube Available Materials
| Material | Description | Availability |
| BN99 | Hot pressed at high temperature (1900℃). Excellent corrosion resistance and thermal conductivity. Limited wear resistance Self-bonded and high purity(>99%) |
Machinable Blanks Finished Parts |
| BNBO | General purpose material Bonded by boric oxide |
Finished Parts |
| BNCB | Calcium borate bonded boron nitride Enhanced moisture resistance |
Finished Parts |
| BN60 | BN 60%, SiO2 40% | Finished Parts |
| BN40 | BN 40%, SiO2 60% | Finished Parts |
| ZSBN | BN-45%, Zr2O3 45% | Finished Parts |
Boron Nitride Tube Advantages
– Low wettability to molten metal
– Low dielectric constant
– Relatively high dielectric strength
– Relatively high thermal conductivity with low thermal expansion
– Relatively high thermal shock resistance
– Extremely high working temperature with proper inert gas protection (>3000C has been recorded).
– Chemical Vapor Deposition (CVD)
Boron Nitride Tube Applications
Boron Nitride ceramic from CG Material can withstand high temperature in the high vacuum environment, plus it is chemically inert — it has excellent corrosion resistance and electrical resistance. Thus, Boron Nitride ceramic product is an ideal choice in a wide range of industries, such as:
-Electric insulators in vacuum system
-Boron Nitride ceramic components for PVD, MOCVD, MBE system.
-Nozzles for nonferrous metals metallurgy industry
-Spacers for glass melting
-Insulators for high-temperature furnace
Packaging
We handle our products with care to ensure they remain in their original condition during storage and transportation and to preserve their quality.
