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Aluminum Nitride (AlN)

Aluminum nitride (AlN) ceramics offer high thermal conductivity (170-200 W/(m·K)), significantly surpassing common ceramics like alumina (20 W/(m·K)) and even metals like copper and aluminum. This allows efficient heat dissipation, improving reliability and lifespan in high-power applications.

AlN also provides excellent electrical insulation, with a resistivity of 10¹⁴ Ω·cm and a breakdown voltage up to 15 kV/mm, making it ideal for high-voltage and high-frequency environments. Its high mechanical strength (12 GPa hardness, 308 GPa Young’s modulus) ensures resistance to impact and wear.

Additionally, AlN ceramics are chemically stable, corrosion-resistant, and offer electromagnetic shielding, reducing external interference and improving electromagnetic compatibility.

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Aluminum Nitride Applications

Aluminum Nitride (AlN) is a high-performance ceramic known for its exceptional thermal conductivity, electrical insulation, and chemical stability, making it ideal for advanced engineering and electronic applications.

  • Electronics & Semiconductors – Used as substrates and packaging materials for high-power devices, transistors, and ICs, providing efficient heat dissipation and excellent electrical insulation.

  • LED Technology – Serves as a substrate for GaN-based LEDs, especially UV LEDs for sterilization, water treatment, and medical diagnostics.

  • Thermal Management – Applied in heat sinks, spreaders, and cooling components for CPUs, lasers, and power electronics to maintain optimal operating temperatures.

  • RF & Microwave Components – Low dielectric loss makes it suitable for antennas, isolators, and circulators, improving communication system performance.

  • Aerospace & Defense – Stable under extreme temperatures for use in sensors, electronic warfare systems, and engine components.

  • Industrial Equipment – Used in crucibles, thermocouple sheaths, and semiconductor manufacturing parts requiring high temperature resistance.

  • Automotive – Integrated into sensors and electronics for effective heat dissipation in demanding vehicle environments.

Properties
Chemical FormulaAlN
Mechanical
Density3.3 g/cm3
Hardness10.4 GPa
Modulus of Elasticity320 GPa
Flexural Strength382 MPa
Compressive Strength1.5 GPa
Poisson’s Ratio0.21
Fracture Toughness2-3 MPa m½
Electrical
Dielectric Strength15 ac V/mm
Dielectric Constant8.56 (@ 1 MHz)
Volume Resistivity1.4*10^14 ohm-cm
Thermal
Coefficient of Thermal Expansion4*10-6 x 10^-6/°C
Thermal Conductivity170 W/(m*K)
Specific Heat0.72 x10^3 J/(Kg*K)
Shock Resistance
Maximum Working Temperature900 °C

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