White HBN: Hexagonal Boron Nitride | High Thermal Conductivity

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

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.