HBN Hot Pressed Boron Nitride Ceramic Rings
- MSJ/BN007
- hot pressed boron nitride
- customized
- 10 pcs per type
- industrial applications
Hot Pressed Boron Nitride (BN) Ceramic is an advanced ceramic material which can be used up to 2100℃ under atmosphere proction conditions. Boron nitride ceramic is used as good electrical insulatiors because it has high electrical resistivity and can withstand high breakdown voltage (about 3-4 times of alumina ceramic). Hot pressed boron nitride also has good thermal conductivity and low thermal expansion coefficient, will not crack even using in applications where rapid temperature change will occur. Hot pressed boron nitride ceramic can also be used as metal smelting crucibles because it will not react with most molten metals or glasses. Benefiting from its soft hardness, hot pressed boron nitride ceramic can be machined into high accuracy and complicated components easily with common metal processing tools.
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Product detail
Hot Pressed Boron Nitride (BN) Ceramic is an advanced ceramic material which can be used up to 2100℃ under atmosphere proction conditions. Boron nitride ceramic is used as good electrical insulatiors because it has high electrical resistivity and can withstand high breakdown voltage (about 3-4 times of alumina ceramic). Hot pressed boron nitride also has good thermal conductivity and low thermal expansion coefficient, will not crack even using in applications where rapid temperature change will occur. Hot pressed boron nitride ceramic can also be used as metal smelting crucibles because it will not react with most molten metals or glasses. Benefiting from its soft hardness, hot pressed boron nitride ceramic can be machined into high accuracy and complicated components easily with common metal processing tools.
Mascera is a reputable supplier for hot pressed boron nitride ceramic, we have developped several grades of materail for different property requirement. Except for high purity 99% boron nitride ceramic, we also supply boron nitride ceramic composited with zirconia ceramic, aluminum nitride, silicon carbide and alumina ceramic etc. Welcome to contact us when you have demand, we will do our best to match your demands.
Main properties of hot pressed boron nitride
Low density
High electrical resistivity
High breakdown voltage resistance
High thermal conductivity
Low thermal expansion coeffient
Good thermal shock resistance
High working temperature in vacuum and gas protection condition
Good corrosion resistance
Non-wetting with metals (without oxidization)
Good Machinability
Typical applications of hot pressed boron nitride
High temperature furnace fixtures and supports
Nozzles for metal powder gas atomization
Nozzle for amorphous soft magnetic
Plasma arc insulators
Crucibles or containers for metals or glasses smelting
Break rings for continuous casting of metals
Electrical insulators for high temperature vacuum equipment
Electrical insulator for PVD/CVD vacuum coating equipment
Electrical insulator for semiconductor equipment
Thermocouple protection tubes
Material Data Sheet
| Material Type | BN-997 | BN-99 | BN-A | BN-B | BN-C | BN-D | BN-E |
|---|---|---|---|---|---|---|---|
Main Content | BN>99.7% | BN>99% | BN+AL+SI | BN+ZR+AL | BN+SIC | BN+ZRO2 | BN+AlN |
Color | White | White | Light Grey | Light Grey | Grey Green | Dark Grey | Grey Green |
Density (g/cm3) | 1.6 | 1.95-2.0 | 2.2-2.3 | 2.25-2.35 | 2.4-2.5 | 2.8-2.9 | 2.8-2.9 |
Flexural Strength (Mpa) | 18 | 30 | 65 | 65 | 80 | 90 | 90 |
Compressive Strength (Mpa) | 45 | 85 | 145 | 145 | 175 | 220 | 220 |
Electrical Resistivity (Ω.Cm) | >1014 | >1014 | >1013 | >1013 | >1012 | >1012 | >1013 |
Max. Service Temp. (℃) @Air Condition | 900 | 900 | 900 | 900 | 900 | 900 | 900 |
Max. Service Temp. (℃) @Vacuum Condition | 1800 | 1800 | 1750 | 1750 | 1800 | 1800 | 1750 |
Max. Service Temp. (℃) @Inert Gas Condition | 2100 | 2100 | 1750 | 1750 | 1800 | 1800 | 1750 |
Thermal Conductivity (W/Mk) | 35 | 40 | 35 | 35 | 45 | 30 | 85 |
Thermal Expansion Coefficient (25 - 1000℃) (10-6/K) | 1.5 | 1.8 | 2.0 | 2.0 | 2.8 | 3.5 | 2.8 |
Performance comparison of boron nitride ceramics and alumina ceramics:
Compared with alumina ceramics, boron nitride ceramics have the following advantages:
1. Boron nitride ceramic has maximum working temperature under atmosphere protection up to 2100 degrees, and alumina ceramic does not exceed 1700 degrees.
2. The thermal shock resistance of boron nitride ceramic is much better than alumina ceramic, boron nitride ceramic will not crack when unergoing rapid temperature rise or fall, it will not crack if it is taken out of the 1000 celsium degree furnace and blowed and quenched continuously for 100 times. Alumina ceramic is easy to crack when working temperature rises or falls quickly.
3. Electrical insulation strength of boron nitride ceramic is 3-4 times that of alumina ceramic.
4. Boron nitride ceramic does not react or bond with moleten glasses or metals, are used as containers for high-temperature sintering or melting crucibles, setter plates, etc.
Compared with alumina ceramics, the disadvantages of boron nitride ceramics are:
1. The strength, hardness and wear resistance of boron nitride ceramics are lower than that of alumina ceramic, and it is not suitable for use under vibration and friction conditions.
2. The use temperature of boron nitride ceramics in the air is only 1000 celsium degrees, and it will oxidize if it exceeds 1000 degrees.
Available shapes of hot pressed boron nitride
Ceramic rod / ceramic pin
Ceramic tube / ceramic bushing / ceramic sleeve
Ceramic ring / ceramic washer / ceramic spacer
Ceramic disc
Ceramic plate / ceramic block
Ceramic nozzle
Ceramic crucible
Other custom ceramic parts
Packing & Shipment
| Package type | carton box with foam protection |
| Payment terms | TT / Western Union / Paypal 50% payment in advanced and 50% before shipment |
| Loading port | Xiamen, China |
| Shipping way | By sea / air / door-to-door express |
