Tijă ceramică cu nitrură de bor
- MSJ/BN004
- nitrură de bor presată la cald (HBN)
- personalizat
- 10 buc per tip
- aplicatii industriale
Tijele de nitrură de bor sunt produse prin sinterizarea prin presare la cald, în vid, la temperatură înaltă, a nitrurii de bor hexagonale sub formă de pulbere. Ele prezintă o rezistență excelentă la temperaturi ridicate, stabilitate chimică remarcabilă, proprietăți ridicate de izolare electrică și rezistență puternică la acizii corozivi. O caracteristică unică a tijelor de nitrură de bor este proprietățile lor de neumezire cu majoritatea metalelor topite, făcându-le ideale pentru producerea de duze ceramice sau creuzete pentru aplicații de topire a metalelor. Spre deosebire de ceramica de alumină sau ceramica de zirconiu, tijele de nitrură de bor au o duritate scăzută și o prelucrabilitate excelentă, permițând prelucrarea ușoară folosind unelte obișnuite de prelucrare a metalelor.
Dacă aveți întrebări, vă rugăm să ne contactați la info@mascera-tec.com sau să ne sunați la +86 13860446139.
Disc ceramic
Placă ceramică / bloc ceramică
Duza ceramicaCrezet ceramicAlte piese ceramice personalizate
Ambalare și expediere
Tip pachet
cutie de carton cu protectie cu spuma
Termeni de plată
TT / Western Union / Paypal
50% plată în avans și 50% înainte de expediere
Portul de încărcare
Xiamen, China
Mod de livrare
Pe mare / aer / expres din ușă în uşă
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 ceramics can work under atmosphere protection at a maximum temperature of up to 2100 degrees, which is higher than that of alumina ceramics that cannot exceed 1700 degrees.
2.Boron nitride ceramics exhibit much better thermal shock resistance than alumina ceramics. For example, boron nitride ceramics will not crack under rapid temperature changes, and even after being taken out of a 1000 Celsius degree furnace and subjected to continuous blowing and quenching for 100 times, it will still not crack. On the other hand, alumina ceramics are prone to cracking under quick temperature changes.
3.The electrical insulation strength of boron nitride ceramics is 3-4 times higher than that of alumina ceramics.
4.Boron nitride ceramics do not react or bond with molten glasses or metals, making them ideal for use as containers for high-temperature sintering or melting crucibles, setter plates, and other applications.
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 |
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