Hexagonal boron nitride (BN) is made by hot-pressed sintering, boron nitride crucibles have good self-lubricate ceramic crucibles that can withstand high temperature and maintain their lubricating capability in a high vacuum environment. boron nitride ceramic has similarly to graphite mechanically but offers excellent electrical resistance.
Innovacera as a leading manufacturer of Boron Nitride components in the world has more than 20 years of experience in the manufacture and sale of Boron Nitride Crucibles (BN Crucibles).
Below is our BN ceramic material properties for your reference:
| BN997 | BN99 | BN-CA | BN-A | BN-B | BN-C | BN-D | BN-E | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Main Composition | BN>99.7% | BN>99% | BN>97.5% | BN+SI | BN+Al₂O₃+ZrO₂ | BN+SIC | BN+ZrO₂ | BN+ALN | ||||||||
| Bonding Composition | B2O3 | B2O3 | Boron calcium oxide | Boron oxide silicon | Boron oxide aluminum | Boron oxide aluminum | B2O3 | Boron oxide aluminum | ||||||||
| Density (g/cm3) | 1.6 | 2 | 2.0-2.1 | 2.0-2.3 | 2.25-2.35 | 2.4-2.5 | 2.8-2.9 | 2.8-2.9 | ||||||||
| Room Temperature Electric Resistivity (Ω·cm) | >1014 | >1014 | >1013 | >1012 | >1012 | >1012 | >1012 | >1013 | ||||||||
| Max Using Temperature (°C) In Atmosphere In Inactive Gas In High Vacuum (Long Time) | 900 2100 1900 | 900 2100 1900 | 900 2100 1900 | 1000 1700 1700 | 1000 1700 1700 | 1000 1700 1700 | 1000 1800 1800 | 1000 1800 1800 | ||||||||
| Three-Point Bending Strength (MPA) | 18 | 35 | 35 | 65 | 65 | 80 | 90 | 90 | ||||||||
| Compressive Strength (MPA) | 45 | 85 | 70 | 145 | 150 | 175 | 220 | 220 | ||||||||
| Thermal Expansion Coefficient (20-1000°C) (10-6/K) | 1.5 | 1.8 | 1.6 | 2 | 2 | 2.8 | 3.5 | 2.8 | ||||||||
| Thermal Conductivity (W/m·k) | 35 | 40 | 32 | 35 | 35 | 45 | 30 | 85 | ||||||||
| Typical Application: | High Temperature Furance | High Temperature Furance | High Temperature Furance | Powder Metallurgy | Powder Metallurgy | Powder Metallurgy | Metal Casting | High Temperature Equipment | ||||||||
| High Temperature Electrical Furnace Components(High Temperature Insulator Sleeve Tube etc) | Y | Y | Y | Y | Y | Y | Y | |||||||||
| Metal Vaporize Crucible | Y | Y | ||||||||||||||
| The Container Of Metal or Glass Melting | Y | Y | Y | Y | Y | Y | Y | Y | ||||||||
| The Casting Mould Components Of The Precious Metal And Special Alloy. | Y | Y | Y | |||||||||||||
| High Temperature Support Part | Y | Y | Y | |||||||||||||
| Nozzle And Transport Tube Of The Melting Metal | Y | Y | Y | Y | Y | Y | Y | |||||||||
| Remark: The value is just for review, different using conditions will have a little difference. | ||||||||||||||||
The Boron Nitride Crucibles are widely used for vacuum melt spinning system, such as:
- Nonferrous & ferrous metals such as Al, Bi, Ge, Sb, Sn, Cd, Pb, Ni, Zn, Cu, Mg, Im, Fe, Stainless Steel…
- Glass melt, Soda glass, Cryolite
- Silicon molten salt, fluoride, slag
There are standard BN crucibles for this melt spinning system application, certainly, we also can make by customized.