Boron nitride products are high-performance items made with boron nitride (BN) as the core material, featuring the following notable characteristics:

Excellent high-temperature resistance properties

• High temperature usage under inert atmosphere: Boron nitride products can withstand high temperatures up to 2800°C in inert gases (such as nitrogen, argon) for long periods, and even reach up to 3000°C (sublimation temperature) for short-term use, far exceeding traditional refractory materials (such as alumina, zirconia).

• Excellent thermal shock resistance: Can withstand hundreds of cycles from 1000℃ to room temperature without cracking, suitable for environments with extreme temperature changes.

Good electrical insulation properties

• High resistivity: Volume resistivity is 10¹⁴ Ω·cm at 25°C, and it remains at 10³ Ω·cm even when heated to 2000°C, making it one of the high-temperature insulators in ceramic materials.

• High breakdown voltage: Breakdown strength reaches 30-40 kV/cm, about 4 times that of alumina, suitable for insulation in high-voltage, high-frequency electrical applications and plasma arcs.

III. High Thermal Conductivity and Anisotropy

• Thermal Conductivity: The in-plane thermal conductivity of hexagonal boron nitride (h-BN) can reach 300～600 W/(m·K), approaching the thermal conductivity of copper, while the thermal conductivity in the vertical direction is lower, preventing local heat concentration.

• Application Scenarios: As heat sink substrates for semiconductor packaging and phase shifter heat rods, effectively reducing the operating temperature of electronic components.

Four: Strong chemical stability

• Resistant to corrosion by molten metals: Does not wet or react with most molten metals (such as aluminum, copper, iron, steel, etc.), suitable for crucibles, boats, and transport pipes for melting and evaporating metals.

• Resistant to acidic and alkaline erosion: Maintains stability in strong acids, bases, and molten salts; the boron-nitrogen bonds may be broken only in hot concentrated alkalis.

V. Self-lubricating and Low Friction Coefficient

• Laminar Structure Lubrication: Hexagonal boron nitride has weak interlayer bonding, allowing adjacent layers to easily slide, providing lubrication with a low friction coefficient of 0.16, and does not increase under high temperatures.

• Application Scenarios: Used as a high-temperature lubricant, release agent, or sprayed on surfaces of components such as gears and cylinder liners to reduce wear.

Six: Mechanical Properties and Machinability

• Mechanically processable: Mosh hardness 2, soft in texture but with strong interlayer bonding, capable of being machined into precise structures (accuracy up to 0.01 mm) through turning, grinding, and other processes.

• Composite Reinforcement: When combined with tungsten carbide and titanium carbide, it can be used to produce high-hardness, wear-resistant tool materials, suitable for high-speed cutting and geological exploration drill bits.