High-temperature sintered aluminum nitride (AlN) ceramics are advanced engineered materials produced through precision sintering processes at elevated temperatures (typically above 1800°C). These ceramics can be customized into complex geometries and tailored dimensions to meet specific application requirements. The manufacturing process involves forming AlN powder into desired shapes via techniques such as dry pressing, injection molding, or slip casting, followed by high-temperature sintering to achieve dense, high-purity ceramic components. Post-sintering machining (e.g., CNC grinding, laser cutting) ensures micron-level dimensional accuracy and surface finish.

Advantages

1. Exceptional Thermal Conductivity: High thermal conductivity (170–220 W/m·K), surpassing most ceramics, enables efficient heat dissipation in demanding environments.

2. High-Temperature Stability: Retains mechanical strength and electrical insulation properties up to 1400°C, ideal for extreme thermal conditions.

3. Low Thermal Expansion: Matches coefficients of expansion with semiconductors (e.g., silicon), reducing stress in electronic packaging.

4. Chemical Resistance: Resists corrosion from molten metals, acids, and alkalis, ensuring longevity in harsh chemical environments.

5. Electrical Insulation: Excellent dielectric properties (breakdown voltage >15 kV/mm) for high-voltage applications.

6. Customizability: Complex shapes (e.g., substrates, crucibles, nozzles) and tight tolerances (±0.01 mm) reduce post-processing needs and costs.

Applications

1. Electronics & Semiconductors:

   • Heat sinks for high-power LED modules, IGBTs, and RF/microwave devices.

   • Substrates for integrated circuits (ICs) and power electronics.

2. Industrial Equipment:

   • Crucibles and trays for molten metal handling (e.g., aluminum, gallium).

   • Plasma-resistant components in semiconductor etching/reactor chambers.

3. Aerospace & Defense:

   • Radomes, missile guidance systems, and thermal management in avionics.

4. Energy & Automotive:

   • Insulating components for electric vehicle (EV) battery systems and fuel cells.

5. Optoelectronics:

   • Laser diode mounts and COB (chip-on-board) packages.

Customization Capability
Tailored solutions for unique industrial needs, including:

• Non-standard geometries (e.g., microchannel coolers, multi-layer structures).

• Surface metallization (e.g., tungsten, molybdenum) for brazing or soldering.

• Small-batch prototyping to mass production.

This combination of performance and adaptability makes high-temperature sintered AlN ceramics a critical material for cutting-edge technologies requiring thermal management, reliability, and precision.