Boron Carbide Nozzle
Boron Carbide Nozzle
Purity: ≥99.5%
Shape: Squares, Hexagons, Triangles, etc.
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Technical data sheet for the boron carbide nozzle
|
Purity: |
≥99.5% |
|
Appearance: |
Black or gray |
|
Chemical formula: |
B₄C |
|
Density: |
2.46-2.62 g/cm³ |
Description of the boron carbide nozzle
Boron carbide is a ceramic material with exceptional hardness, approaching that of diamond and cubic boron nitride, typically manufactured through sintering processes. Boron carbide nozzles are produced by hot pressing or pressure-free sintering, offering high hardness, wear resistance, and superior resistance to high temperatures and corrosion. Their service life is three times longer than that of conventional hard alloys such as tungsten carbide and silicon carbide. Advanced Ceramics Hub provides high-precision boron carbide nozzles with consistent quality and minimal size variation, suitable for both large-scale and custom production.
Boron carbide nozzle specifications
|
Length (mm) |
Outer diameter (mm) |
Inner diameter (mm) |
Length (mm) |
Outer diameter (mm) |
Inner diameter (mm) |
|
35 |
20 |
4 |
60 |
20 |
8 |
|
35 |
20 |
6 |
60 |
20 |
10 |
|
35 |
20 |
8 |
60 |
25 |
10 |
|
35 |
20 |
10 |
80 |
20 |
4 |
|
35 |
20 |
12 |
80 |
20 |
6 |
|
45 |
20 |
6 |
80 |
20 |
8 |
|
45 |
20 |
8 |
80 |
20 |
10 |
|
45 |
15 |
6 |
80 |
20 |
12 |
|
55 |
15 |
6 |
80 |
29 |
10 |
|
55 |
20 |
5 |
80 |
29 |
12 |
|
55 |
20 |
8 |
82 |
21 |
6 |
|
60 |
20 |
6 |
82 |
21 |
8 |
Types of boron carbide nozzles
- Straight orifice nozzle
- Long Venturi nozzle
- Double Venturi nozzle
- Angled nozzle
- Banana Nozzle
- Wet nozzle
- Inner tube nozzle
- Custom nozzle
Advantages of the boron carbide nozzle
- High hardness and resistance
- Excellent resistance to thermal shock
- Excellent chemical inertness
- Excellent wear resistance
- Good corrosion resistance
- High temperature resistance
- High flexural strength
- Lightweight
Boron carbide nozzle. Pressure-free sintering process.
- Raw material preparation : Use high purity boron carbide powder and sintering auxiliaries.
- Powder mixing : Mix the powder and sintering auxiliaries evenly.
- Molding : Giving the powder the desired shape.
- Degassing : Remove volatile components to prevent bubbles or cracks.
- Sintering without pressure : Sintering at 1600-2000°C.
- Refrigeration and inspection : Cool to room temperature and check quality.
Applications of the boron carbide nozzle
- Sandblasting : It is used in sandblasting nozzles, which withstand high-speed abrasive impacts for surface cleaning, rust removal, or etching.
- Waterjet cutting : They are used as main components of waterjet nozzles, as they withstand high-pressure water and abrasive impacts to precisely cut metals, ceramics, and other materials.
- Industrial coating : Applied to thermal or plasma spraying equipment, it resists high temperatures and chemical corrosion to ensure coating quality.
- Chemical industry : It is used in nozzle systems for spraying corrosive liquids or gases, extending the service life.
- Agriculture and firefighting: It is used in high-pressure spraying systems, such as agricultural irrigation or firefighting, offering durability and a long service life.
Sandblasting Process
Waterjet cutting
Thermal Spraying
Boron Carbide Material Properties
Boron Carbide Material Grades
Reaction bonded boron carbide (B4C) is primarily used ballistic armor, providing excellent protection while reducing weight as compared to other armor materials.
|
Properties |
Units |
Reaction Bonded |
|
Flexural Strength, MOR (20 °C) |
MPa |
250 |
|
Fracture Toughness, KIc |
MPa m1/2 |
3.0 – 4.0 |
|
Thermal Conductivity (20 °C) |
W/m K |
50 |
|
Coefficient of Thermal Expansion |
1×10-6/°C |
4.5 |
|
Maximum Use Temperature |
°C |
1000 |
|
Dielectric Strength (6.35mm) |
ac-kV/mm |
— |
|
Dielectric Loss (tan δ) |
1MHz, 25 °C |
— |
|
Volume Resistivity (25°C) |
Ω-cm |
10³ |
Reaction Bonded B4C Advantages:
- High strength
- High hardness
- Cost-effective
- Suitable for large-scale applications
Hot-pressed, also known as pressure assisted densified (PAD), boron carbide is one of the hardest materials available in commercial shapes. This exceptional hardness combined with low density is used in ballistic armor, maximizing protection while minimizing weight.
|
Properties |
Units |
Hot Pressed |
|
Flexural Strength, MOR (20 °C) |
MPa |
320 – 450 |
|
Fracture Toughness, KIc |
MPa m1/2 |
3.0 – 4.0 |
|
Thermal Conductivity (20 °C) |
W/m K |
45 – 100 |
|
Coefficient of Thermal Expansion |
1×10-6/°C |
4.5 – 4.9 |
|
Maximum Use Temperature |
°C |
2000 |
|
Dielectric Strength (6.35mm) |
ac-kV/mm |
— |
|
Dielectric Loss (tan δ) |
1MHz, 25 °C |
— |
|
Volume Resistivity (25°C) |
Ω-cm |
100 |
Hot Pressed B4C Advantages:
- Higher density
- Better mechanical properties
- Ideal for high-strength, high-temperature engineering materials
Pressureless sintered boron carbide combines high purity and the excellent mechanical properties of boron carbide for use in both ballistic armor and semiconductor manufacturing.
|
Properties |
Units |
Sintered |
|
Flexural Strength, MOR (20 °C) |
MPa |
450 |
|
Fracture Toughness, KIc |
MPa m1/2 |
3.0 – 5.0 |
|
Thermal Conductivity (20 °C) |
W/m K |
43 – 100 |
|
Coefficient of Thermal Expansion |
1×10-6/°C |
4.5 – 4.9 |
|
Maximum Use Temperature |
°C |
— |
|
Dielectric Strength (6.35mm) |
ac-kV/mm |
— |
|
Dielectric Loss (tan δ) |
1MHz, 25 °C |
— |
|
Volume Resistivity (25°C) |
Ω-cm |
10 |
Pressureless Sintered B4C Advantages:
- High hardness
- Excellent wear resistance
- High chemical stability
- Low density
- Good thermal stability
Boron Carbide Ceramic Machining
Boron Carbide Ceramic machining is a demanding process used to shape this ultra-hard ceramic into precise components for technical applications. Due to its exceptional hardness and brittleness, machining boron carbide requires specialized tools and careful control to prevent cracking or surface damage. While the material can be shaped more easily in its green or biscuit state, achieving tight tolerances often requires machining after full sintering, which involves diamond-based techniques. The common machining methods include:
- Diamond Cutting: Diamond-coated tools are essential for cutting fully sintered boron carbide, enabling accurate shaping and smooth surface finishes.
- Precision Grinding: Used to achieve fine tolerances and clean finishes. This process is slow and requires careful handling to avoid micro-cracks or structural damage.
- Ultrasonic Machining: Applies high-frequency vibrations with abrasive slurry to remove material gently, suitable for intricate and delicate shapes.
- Laser Cutting: A non-contact technique effective for pre-sintered material or thin sections, offering clean edges with minimal thermal stress.
- Green Machining: Carried out before sintering, allowing easier shaping of complex geometries. However, post-sintering shrinkage (~20%) must be accounted for in final dimensions.
Boron Carbide Ceramic Packaging
Boron Carbide ceramic products are typically packaged in vacuum-sealed bags to prevent moisture or contamination and wrapped with foam to cushion vibrations and impacts during transport, ensuring the quality of products in their original condition.
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