High Thermal Conductivity Alumina Nitride ALN Ceramic Insulation Part Component

Aluminum nitride ceramic parts are various components made based on aluminum nitride ceramics. With their excellent comprehensive performance, they play a key role in multiple high-tech fields. Here is a detailed introduction about it:

Characteristics

High thermal conductivity and insulation: At room temperature, the thermal conductivity of aluminum nitride ceramic parts can reach 170-230W/ (m·K), which is 5-10 times that of alumina ceramics. It can dissipate heat quickly. Meanwhile, its volume resistivity is as high as 10¹⁴-10¹⁶Ω· cm, and it also has excellent electrical insulation properties, effectively preventing short circuits in the circuit.

Low dielectric constant and loss: The dielectric constant is between 8.5 and 9.5, which is much lower than that of alumina, and the dielectric loss is less than 0.001. It can reduce signal attenuation and interference during high-frequency signal transmission, ensuring the stability and speed of signal transmission.

High-temperature resistance and thermal stability: The melting point is as high as 2200℃, and it can maintain structural stability for a long time below 1500℃. The coefficient of thermal expansion is close to that of silicon chips, which can reduce the interface stress caused by temperature changes and prevent the chip from peeling off the substrate.
Good chemical stability: It is resistant to most chemical media except strong acids, and is not prone to oxidation and deterioration in a humid environment. It can maintain good performance in corrosive environments.

Manufacturing Process

Generally, high-purity AlN ceramic powder is uniformly mixed with a small amount of sintering AIDS, and then formed into green bodies through isostatic pressing. Subsequently, the green bodies are sintered and hot isostatic pressed in a nitrogen or inert atmosphere to densify them. Finally, the green bodies undergo precise mechanical processing and surface polishing.

Application Fields

In the semiconductor field: It is often used to manufacture heat dissipation substrates, carrier boards, electrostatic chucks and other components. Through 3D printing technology, complex heat dissipation channels can be designed inside the substrate to meet the heat dissipation requirements of high-end chips.

In the field of new energy, it can be used to manufacture battery heat sinks, insulating brackets, etc. It can not only quickly dissipate the heat generated by the battery during operation, but also achieve electrical insulation between battery cells, improving the safety and service life of the battery pack.

In the field of 5G communication: It is used to manufacture antenna covers, filters, RF device housings, etc. Its low dielectric constant and low loss characteristics can reduce the attenuation of high-frequency signals, improve communication quality, and at the same time, it is relatively light in weight, meeting the requirements of lightweight equipment.

In the aerospace field: It can be used to manufacture high-temperature resistant circuit boards, sensor housings, etc. It can maintain structural accuracy and performance stability in extreme temperature environments ranging from -180 ℃ to 1200℃, ensuring the normal operation of equipment.

Common Types

Aluminum nitride ceramic substrate: It is one of the most common aluminum nitride components, featuring excellent thermal conductivity and electrical insulation, and is widely used in heat dissipation of electronic devices and circuit packaging.

Aluminum nitride ceramic heat sinks: Usually manufactured by 3D printing and other processes, they can be designed into different shapes and structures according to actual needs to enhance heat dissipation efficiency. They are often used for heat dissipation in battery packs of new energy vehicles, high-power electronic devices, etc.

Aluminum nitride ceramic antenna radome: It features low dielectric constant and low loss, ensuring good transmission of high-frequency signals and protecting the internal antenna from external environmental influences. It is applied in 5G communication, satellite communication and other fields.

Why are aluminum nitride ceramics so expensive?

1. Since aluminum nitride does not exist in nature, it is produced through chemical amplification and synthesis.
2. The powder needs to undergo multiple purifications and has a high purity requirement.
3.The precision machining process requires diamond grinding tools and precision machine tools. Ceramics have high hardness and the processing is slow

How can the price of aluminum nitride ceramic parts be reduced?

Answer: There are several ways to reduce product prices
1. The order quantity can be increased
2. Reduce the precision requirements for products
3. Or change the product structure to facilitate molding, sintering and processing, and reduce the scrap rate
4. Select materials with lower prices such as alumina

Technical Specifications