Aluminum nitride ceramic parts

Aluminum nitride ceramic (AlN) is a high-performance engineering ceramic material that is widely used in multiple fields due to its excellent physical and chemical properties.

Core features:
High thermal conductivity: The thermal conductivity can reach 170-230 W/(m · K), which is 5-10 times that of alumina ceramics, making it very suitable for scenarios that require efficient heat dissipation.
High temperature resistance: With a melting point of up to 2200 ℃, it can maintain stability in high temperature environments and is suitable for extreme conditions.
Chemical stability: Strong corrosion resistance, not easily corroded by molten metals (such as aluminum liquid) and chemical reagents.
Electrical insulation: With a resistivity of up to 10 ¹³ -10 ¹⁴Ω· cm, it is suitable as an insulation material.
High strength and high hardness: The bending strength can reach 300-350 MPa, and the Mohs hardness is 7-9 levels, with good wear resistance and impact resistance.

application
Aluminum nitride ceramic parts have been widely used in multiple fields due to their excellent performance:
electronics industry:
Used for manufacturing heat sinks, substrates, and packaging materials, especially in LED lighting, power modules, and semiconductor devices, it can significantly improve heat dissipation efficiency and device reliability.
Microwave communication:
With high thermal conductivity and low dielectric constant, aluminum nitride ceramics are used in microwave circuit substrates and packaging to improve signal transmission quality.
Aerospace:
It performs well in engine components, thermal protection systems, and high-temperature structural materials due to its high temperature resistance, lightweight, and high-strength characteristics.
Automotive industry:
Used for heat dissipation modules and motor components in electric and hybrid vehicles to meet efficient heat dissipation requirements.
medical apparatus and instruments:
Due to its biocompatibility and wear resistance, it is suitable for implant materials such as artificial joints and dental restorations.
Metal smelting and chemical industry:
As a high-temperature reaction vessel and furnace lining material, it is used for equipment in high-temperature and corrosive environments.

Customized description
The customized manufacturing of aluminum nitride ceramic parts requires consideration of their material characteristics and user needs. The following are the main customization steps:
3.1 Material Characteristics and Customization Advantages
Shape and specifications: Parts can be processed into complex shapes and different specifications according to customer needs to meet specific application scenarios.
Surface treatment:
Metalization: The combination of metal and ceramic is achieved through active metal brazing (AMB) or direct copper-clad bonding (DBC) for electronic packaging and circuit boards.
Coating treatment: can increase wear resistance, corrosion resistance, or insulation performance to adapt to specific working environments.
Performance optimization: By adjusting sintering aids and sintering temperature, optimize properties such as thermal conductivity, strength, and density.
3.2 Processing Technology
The manufacturing of aluminum nitride ceramic parts includes the following key processes:
Powder preparation:
Using high-purity aluminum nitride powder, it is prepared by carbon thermal reduction method or direct nitriding method to ensure the purity and particle size distribution of the powder.
Molding process:
Dry pressing molding: suitable for large-scale production of simple shapes.
Isostatic pressure forming: used for complex shaped parts with uniform density, suitable for high-performance requirements.
Powder injection molding: suitable for small precision parts, with high precision but high cost.
Sintering process:
Common methods include pressureless sintering, spark plasma sintering (SPS), and microwave sintering, which can improve density and thermal conductivity.
machining:
Use CNC machine tools, laser cutting and other equipment for rough and fine machining to ensure dimensional accuracy and surface quality.
Post processing:
Including chemical mechanical polishing (CMP), magneto rheological polishing (MRF), etc., used to improve surface smoothness and accuracy.
3.3 Customized Parameters
Size and shape: Design the diameter, height, and special structure of the parts according to customer requirements.
Surface treatment: Choose a suitable metallization or coating process to meet the requirements of conductivity, corrosion resistance, or insulation.
Performance optimization: By adjusting sintering aids and process parameters, customized thermal conductivity, strength, and density can be achieved.

Aluminum nitride ceramic parts are widely used in various fields such as electronics, aerospace, automotive, medical, etc. due to their excellent properties such as high thermal conductivity, high temperature resistance, and chemical stability. Its customized manufacturing requires a combination of powder preparation, molding, sintering, and mechanical processing techniques to meet the requirements of different industries for shape, performance, and surface quality.