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What is Aluminum Nitride AlN Powder Used For?

Aluminium buyers in the US physical metal market have held off on new orders amid fears of a recession triggered by rising inflation and supply chain crises.  

Spot aluminium trading on the market has been suspended in recent weeks, according to industry sources, as uncertainty has increased following the outbreak of the conflict between Russia and Ukraine.  Even before the war, the aluminium market was suffering from long waiting times and weak demand.  

For aluminium buyers, recent poor US economic data have been a big factor in delaying purchases.  Data released last month showed that the ISM manufacturing PMI came in at 57.1 in March, below expectations of 59 and down from 58.6 in February, unexpectedly hitting the lowest reading since September 2020.  This was mainly due to a slowdown in new orders and AlN powder are expected to increase in the future.

Introduction to Aluminum Nitride AlN Powder
Aluminum nitride is a covalent bond compound. The chemical formula is AIN. It is an atomic crystal, belongs to the diamond-like nitride, hexagonal crystal system, has a wurtzite type crystal structure, non-toxic, white or off-white.

Aluminum Nitride AlN Powder Properties
Other Names Aluminium nitride
CAS No. 24304-00-5
Compound Formula AlN
Molecular Weight 40.9882
Appearance white to pale yellow powder
Melting Point 2200°C
Boiling Point 2517 °C (dec.)
Density 2.9-3.3g/cm3
Solubility in H2O N/A
Exact Mass 40.9846


Aluminum Nitride AlN powder CAS 24304-00-5


Applications of Aluminum Nitride AlN Powder
1. Piezoelectric device application
Aluminum nitride has high resistivity, high thermal conductivity (8-10 times of Al2O3), and low expansion coefficient similar to silicon, making it an ideal material for high temperature and high-power electronic devices.
2. Electronic packaging substrate material
Commonly used ceramic substrate materials are beryllium oxide, alumina, aluminum nitride, etc., among which alumina ceramic substrate thermal conductivity is low, thermal expansion coefficient and silicon do not match. Although beryllium oxide has excellent properties, its powder is highly toxic. 
In the existing ceramic materials that can be used as substrate materials, silicon nitride ceramic has the highest bending strength, good wear resistance, the best comprehensive mechanical properties of ceramic materials, and its thermal expansion coefficient is the smallest. And aluminum nitride ceramics have high thermal conductivity, good thermal impact resistance, and still have good mechanical properties at high temperatures. It can be said that aluminum nitride and silicon nitride are the most suitable materials for electronic packaging substrates from the point of view of performance, but they also have a common problem is that the price is too high.
3. Applied to luminous materials 
Aluminum nitride has a maximum direct bandgap width of 6.2eV, which has a higher photoelectric conversion efficiency than indirect bandgap semiconductors. As an important blue and ultraviolet luminescent material, AlN is used for ultraviolet or deep-ultraviolet light-emitting diodes, ultraviolet laser diodes, and ultraviolet detectors. In addition, AlN can form continuous solid solutions with group III nitride compounds such as GaN and InN, and its three or four-element alloys can achieve a continuously tunable bandgap from visible band to deep ultraviolet band, making it an important high-performance luminescent material.
4. Applied to the substrate materials
AlN crystals are ideal substrates for GaN, AlGaN, and AlN epitaxial materials. Compared with sapphire or SiC substrates, AlN has higher thermal matching and chemical compatibility with GaN and lower stress between the substrate and the epitaxial layer. Therefore, AlN crystal as GaN epitaxial substrate can greatly reduce the defect density in the device, improve the performance of the device, and has a good application prospect in the preparation of high temperature, high frequency, high power electronic devices. 
In addition, the substrate of AlGaN epitaxial material with AlN crystal as a high Al component can effectively reduce the defect density in the nitride epitaxial layer, and greatly improve the performance and service life of nitride semiconductor devices. High quality daily blind detector based on AlGaN has been successfully applied.
5. Used for ceramics and refractory materials
Aluminum nitride can be used in the sintering of structural ceramics. The prepared aluminum nitride ceramics have good mechanical properties, higher flexural strength than Al2O3 and BeO ceramics, and high-temperature resistance and corrosion resistance. AlN ceramics can be used to make crucible, Al evaporating dish, and other high-temperature corrosion-resistant parts. In addition, pure AlN ceramics are colorless transparent crystals with excellent optical properties, which can be used as heat-resistant coatings for high-temperature infrared windows and fairings of transparent ceramics manufacturing electronic optical devices.
6. Composite materials
As a packaging material, epoxy resin/AlN composite materials need good thermal conductivity and heat dissipation, and this requirement is becoming more and more stringent. Epoxy resin as a kind of polymer material with good chemical properties and mechanical stability, it is easy to cure, has low shrinkage, and has low thermal conductivity.  By adding AlN nanoparticles with excellent thermal conductivity into epoxy resin, the thermal conductivity and strength of the material can be effectively improved.

Main Supplier of Aluminum Nitride AlN Powder
Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) is a trusted global chemical material supplier & manufacturer with over 12-year-experience in providing super high-quality chemicals and Nanomaterials, including silicon powder, nitride powder, graphite powder, zinc sulfide, calcium nitride, 3D printing powder, etc.
If you are looking for high-quality Aluminum Nitride AlN Powder, please feel free to contact us and send an inquiry. ([email protected])


As the duration of the conflict between Russia and Ukraine grows, its impact on commodities is widening amid the tug-of-war. Recently, European and American sanctions against Russia have been issued one after another. In response, Russia has taken advantage of its role as an important supplier of many energy and commodities, requiring exports of commodities, including energy, grain, metal, and wood, to "unfriendly" countries to be settled in robles. Therefore, it is expected that the price of the AlN powder will continue to increase.  

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