Hot Pressed Boron Nitride Ceramic Plate
- MSJ/BN005
- hot pressed boron nitride
- customized
- 10 pcs per type
- industrial applications
Boron nitride plates are manufactured using hexagonal boron nitride (HBN) powder, which is then processed through high-temperature vacuum hot-pressing sintering. These plates have exceptional resistance to high temperatures, extremely stable chemical properties, high electrical insulation properties, and strong resistance to acidic corrosion. The unique quality of boron nitride plates is their non-wetting characteristic with most molten metals, making them suitable for producing ceramic nozzles or crucibles for metal smelting operations. Compared to alumina ceramic or zirconia ceramic, boron nitride plates have low hardness and excellent machinability, which allows for easy machining using standard metal working tools.
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Product detail
Boron nitride plates are made of powdered hexagonal boron nitride (HBN) through high-temperature vacuum hot-pressing sintering. Boron nitride plates have good resistance to high temperatures, extremely stable chemical properties, resistance to strong acid corrosion and high electrical insulation properties. The distinctive feature of boron nitride plates is that it is non-wetting with most molten metals, therefore it can be used to produced ceramic nozzles or crucibles for metal smelting jobs. Unlike alumina ceramic or zirconia ceramic, boron nitride plates have low hardness and good machinablity, the machining will be easily done with common metal working tools.
Mascera is a reputable supplier for boron nitride plates, the maximum size we could produce is 480mm x 480mm x 220mm. To meet different property requirement of users, we have developped several grades of boron nitride ceramic. Except for regular 99% boron nitride ceramic, we also supply boron nitride ceramics composited with zirconia ceramic, aluminum nitride, silicon carbide and alumina ceramic etc.
Main properties of boron nitrde plates
Easy to process various complex shapes and customization
Exceptional heat resistance
High thermal conductivity
Low coefficient of thermal expansion and excellent thermal shock resistance
Excellent electrical insulation performance at high temperatures
High resistance to wetting by molten metals, slags, and glasses
Excellent corrosion and wear resistance
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.
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 |
