Product Name | HBN Boron Nitride Ceramic Guiding Nozzles for Molten Metal Liquid | ||
Material | 99% Hot Pressed Boron Nitride/HPBN Ceramic/BN Ceramic | ||
Color | Light Grey | ||
Usage | Ceramic nozzle for high temperature metal solution | ||
Available Max. Size | 420mm (length or width) | ||
Available Shapes | rings, discs, rods, tubes, sleeves, bushings, shafts, rollers, balls, blocks etc |
Hot Pressed Boron Nitride (HPBN) Ceramic is one of industrial ceramic materials, its hardness and mechanical strength is not as high as other Al2O3, ZrO2, Si34, SiC and AlN ceramics, so it is not suitable for mechanical applications. Its most famous features are in thermal and electrical applications and most applied as heat resistant parts or electrical insulators for various fields.
Main properties of Boron Nitride ceramics are:
●Good thermal shock resistance for sudden temperature change
●High thermal conductivity
●Low thermal expansion coefficient
●High temperature resistance (especially in inert gas or vacuum, up to around 2000℃)
●Good electrical insulation (breakdown strength is 4 times of Alumina Ceramics)
●Good chemical stability and no reaction with most molten metals like Cu, Stainless Steel, Fe, Sn, Zn and Sb etc.
●Good machinability, can be easily machined with normal metal tools
Mascera produces Boron Nitride materials with different composition, which provides different properties for cutomer's applications.
Material Type | BN99 | BN-Ca | BN-A | BN-B | BN-C | BN-D | BN-E |
Main Content | BN>99% | BN>97.5% | BN+AL+SI | BN+ZR+AL | BN+SiC | BN+ZrO2 | BN+ALN |
Density (g/cm3) | 1.95-2.0 | 2.0-2.1 | 2.2-2.3 | 2.25-2.35 | 2.4-2.5 | 2.8-2.9 | 2.8-2.9 |
Flexural Strength (Mpa) | 30 | 35 | 65 | 65 | 80 | 90 | 90 |
Compressive Strength (Mpa) | 58 | 70 | 145 | 145 | 175 | 220 | 220 |
Electrical Resistivity (Ω.cm) | >1014 | >1013 | >1013 | >1013 | >1012 | >1012 | >1013 |
Max. working temperature (℃) @air condiction | 900 | 900 | 1000 | 1000 | 1000 | 1000 | 1000 |
Max. working temperature (℃) @inert gas condiction | 2100 | 2100 | 1750 | 1800 | 1800 | 1800 | 1800 |
Max. working temperature (℃) @vacuum condiction | 1900 | 1900 | 1750 | 1800 | 1800 | 1800 | 1800 |
Thermal conductivity (w/mk) | 30 | 32 | 35 | 35 | 45 | 30 | 85 |
Thermal Expansion Coefficient (10-6/k) (25-1000℃) | 1.5 | 1.6 | 2.0 | 2.0 | 2.8 | 3.5 | 2.8 |
●Electrical Insulating parts for vacuum furnace/polysilicon ingot furnace/semiconductor device
●Crucibles or containers for high purity molten metals
●Break rings for continuous casting of metals
●Ceramic nozzles for metal powder gas atomization
●Heat resistant ceramic parts