Hexagonal Boron Nitride (HBN) with High Thermal Conductivity, Excellent Thermal Shock Resistance, and High Chemical Resistance
Price:
200-500 yuan/kg
MOQ:
Negotiable
Delivery Time:
Negotiable
Brand:
KEGU
Product Description
White HBN: Hexagonal Boron Nitride | High Thermal Conductivity
Product Overview: Hexagonal Boron Nitride (HBN)
Hexagonal Boron Nitride (HBN), often termed White Graphite, is an advanced ceramic material composed of boron and nitrogen atoms. With a chemical composition of 43.6% boron and 56.4% nitrogen, it exists in several crystalline forms, including hexagonal (HBN), rhombohedral (RBN), cubic (CBN), and wurtzite (WBN) boron nitride.
HBN is synthesized by melting B₂O₃ with NH₄Cl or through boron combustion in NH₃. Its graphite-like structure delivers exceptional thermal conductivity, electrical insulation, and chemical resistance—making it ideal for high-temperature and demanding industrial applications.
Key Technical Parameters
| Product Category | Mean Particle Size (nm) | Specific Surface Area (m²/g) | Bulk Density (g/cm³) | Crystal Structure | Color |
|---|---|---|---|---|---|
| Nano Grade | 50 | 43.6 | 0.11 | Hexagonal | White |
| Sub-Micron Grade | 600 | 9.16 | 2.30 | Hexagonal | White |
Material Properties & Advantages
- High Thermal Conductivity: Efficient heat dissipation even at elevated temperatures.
- Excellent Electrical Insulation: Volume resistivity >10¹⁵ Ω*cm.
- Outstanding Thermal Stability: Service temperatures up to 900°C in oxidizing atmospheres and 2800°C in inert/reducing environments.
- Low Thermal Expansion: CTE (c-axis): 41*10⁻⁶/°C; (d-axis): -2.3*10⁻⁶/°C.
- Superior Mechanical Properties: Compressive strength of 170 MPa.
- Chemical Inertness: Resistant to inorganic acids, water, and molten metals.
- Good Lubricity: Low coefficient of friction, especially at high temperatures; often blended with graphite fluoride or MoS₂ for enhanced performance.
Applications of Hexagonal Boron Nitride
- High-Temperature Lubricants: Dispersions in oil or water for wire drawing, pressing, and sliding parts in high-temperature furnaces.
- Self-Lubricating Components: Bearings and seals in sintered form.
- Thermal Management Materials: Ideal for heat sinks, insulators, and substrates.
- Protective Coatings: Used in metallurgy, electronics, and aerospace for its non-wetting and release properties.
- Tooling & Abrasives: When converted to cubic boron nitride (CBN), it serves as a superhard material for cutting and grinding.
Product Grades & Specifications
| Item / Grade | BNH | BNC | BNP |
|---|---|---|---|
| BN Purity | >99.5% | Composite | >96% |
| Density (g/cm³) | 1.9 ± 0.5 | 2.95 | 2.0 |
| Max Operating Temp (°C) | 850 (air) 2200 (inert) |
1000 2000 |
850 1150-1800 |
| Hardness (Mohs) | 4 | 105 | 16 |
| Flexural Strength (psi) | 3000 | 21000 | 9800 |
| Thermal Conductivity (W/m*K) | 63 | 38 | 55 |
| CTE (*10⁻⁶/K, RT-1500°C) | 0.6 | 3.5 | 4.0 |
| Volume Resistivity (Ω*cm) | >10¹⁵ | - | >10¹⁵ |
Typical Impurities (%)
- Oxygen: <0.4 (BNH), <14 (BNC), <2.0 (BNP)
- Carbon: 0.02 (BNH), 2.0 (BNC), 0.02 (BNP)
- Calcium: 0.04 (BNH), 0.02 (BNC), 2 (BNP)
- B₂O₃: 0.2 (BNH), 1.0 (BNC), 0.4 (BNP)
- Zirconium (Zr): -, 30 (BNC), -
- Silicon (Si): -, 4.5 (BNC), -
Manufacturing & Processing
HBN is typically produced in a graphite-like structure. Under high temperature (1800°C) and high pressure (8000 MPa), it transforms into cubic boron nitride (CBN)—an ultra-hard material suited for abrasive tools, cutting instruments, and drill bits.
Why Choose Our Hexagonal Boron Nitride?
We supply high-purity HBN in nano and sub-micron grades, optimized for superior thermal management, electrical insulation, and lubrication across industries. Whether for R&D or industrial production, our HBN ensures reliability and performance under extreme conditions.
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Get in Touch
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Company
Shaanxi KeGu New Material Technology Co., Ltd
Location
5# Chaoyang Road,Weicheng Sub-district，Qinhan New City, Xixian New Area, Xi'an Shaanxi Province,China,712039
Contact Person
Yuki