Hot Press BN Boron Nitride Ceramic Rings And Crystal Tubes Horizontal Continuous Casting
Hot-Press Boron Nitride BN Ceramic Horizontal Continuous Casting Separation Rings And Crystal Tubes
Boron nitride belongs to the hexagonal system. Its structure is similar to graphite, and their properties are also similar. Therefore, it is also called " white graphite". It has good heat resistance, thermal stability, thermal conductivity, high temperature dielectric strength, and is an ideal heat dessipating material and high temperature insulatiing material. Mohs Hardness 2 can be processed into various shaped parts.
Performance
- The oxidation resistance temperature is 1000℃, which can replace graphite products.
- Metal corrosion resistance, no wetting, long service life.
- The product has high density, good mechanical strength, does not react with most active metals, and has good chemical stability.
The main products of Boron Nitride Ceramics
Hot pressing hexagonal boron nirtride ceramic and boron nitride composite ceramic, includes:
- Insulation tubes, sleeve, and parts for vacuum furnace
- nozzles for amorphous soft magnetic alloy spray tapes and metal powders gas atomization
- horizontal continuous casting separation rings/crystal tubes
- crucibles, composite ceramic molds
- TiB2/graphite composite ceramic cathodes for electrolytic aluminum
- graphite/BN ceramic composite evaporator boats for vacuum evaporation and aluminum plating
- large and medium-sized vacuum hot pressing furnaces
- large size hot pressing molds, etc.
Boron Nitride Nozzle Basic Information & Materials
| Typical Properties | BN-H | BN99 | BN-Ca | BN-A | BN-B | BN-C | BN-D | BN-E | |
| Composition | hBN>99% | hBN>99% | hBN>98.5% | hBN+AL+SI | hBN+AL+ZR | hBN+SIC | hBN+ZrO2 | hBN+ALN | |
| Binder | B2O3 | B2O3 | B2O3 | B2O3+Al2O3+SiO2 | B2O3+Al2O3 | B2O3 | B2O3+Al2O3 | B2O3+Al2O3 | |
| Color | White | White | White | White Graphite | White Graphite | Greyish-Green | White Graphite | Greyish-Green | |
| Typical Density (g/cm3) | 1.55~1.6 | 1.85~1.98 | 1.98~2.03 | 2.25~2.35 | 2.25~2.35 | 2.40~2.50 | 2.25~2.95 | 2.45~2.95 | |
| Thermal Properties | |||||||||
| Max. Using Temperature (°C) In Air In Inert In Vacuum |
900 2100 1900 |
900 2100 1900 |
900 2100 1900 |
1000 1750 1750 |
1000 1700 1700 |
1000 1700 1700 |
1000 1800 1800 |
1000 1800 1800 |
|
| Thermal Expansion (RT·1000 °C ) (10-6/K) |
1.5 | 1.5 | 1.5 | 2 | 2 | 2.8 | 3.5 | 2.8 | |
| Thermal Conductivity (W/mk) | 15 | 35 | 35 | 30 | 30 | 40 | 30 | 85 | |
| Electrical and Mechanical Properties | |||||||||
| Electrical Resistiity (Ω/cm) | >1014 | >1014 | >1014 | >1013 | >1013 | >1012 | >1012 | >1013 | |
| Bending Strength (MPa) | 28 | 30 | 30 | 65 | 65 | 80 | 90 | 90 | |
| Compressive Strength(MPa) | 50 | 55 | 55 | 145 | 145 | 175 | 220 | 220 | |
| Typical Applications | high-temperature Vacuum |
High-Temperature Vacuum |
High-Temperature Vacuum |
Powder Metallurgy |
Powder Metallurgy |
Powder Metallurgy |
Metal Casting | Powder Metallurgy |
|
| lnlustratior for High-Temperature Furnace | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | |
| Crucibles for Metal Evaporation | ✓ | ✓ | ✓ | ✓ | |||||
| Parts for Melting Metals or Glass | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | |
| Casting Mold for Metals or Alloys | ✓ | ✓ | ✓ | ||||||
| Support Parts for High-Temperature | ✓ | ✓ | ✓ | ||||||
| Pipes or Nozzles for Liquid Metal Handling | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ | ||
| Crucibles for Ceramic Sinter | ✓ | ✓ | ✓ | ✓ | ✓ | ||||
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