SUOYI Aluminum Nitride (AlN) Powder

2026-11-10

SUOYI Aluminum Nitride (AlN) Powder
Aluminum Nitride Powder
High-Purity Aluminum Nitride
AlN
CAS: 24304-00-5

Aluminum Nitride (AlN) is a high-performance advanced ceramic powder material (CAS: 24304-00-5) that combines ultra-high thermal conductivity with excellent electrical insulation properties. It features a theoretical thermal conductivity of up to 320 W/m·K, high electrical resistivity, low dielectric loss, and a coefficient of thermal expansion similar to that of single-crystal silicon. Characterized by strong batch-to-batch consistency, strictly controlled impurity levels, and superior sintering performance, this material is widely used in substrates for semiconductor power devices, IGBTs, optical modules, LED thermal management, thermally conductive adhesives/fillers, high-temperature structural ceramics, and refractory materials. It serves as a core powder raw material for high-end electronic thermal management.

Aluminum Nitride (AlN)—identified by the standard CAS number 24304-00-5—is a key advanced ceramic powder material used in the thermal management of third-generation semiconductors. As a covalently bonded compound with a hexagonal wurtzite crystal structure, it offers both ultra-high thermal conductivity and exceptional electrical insulation. While its theoretical thermal conductivity reaches 320 W/m·K, standard industrial-grade products typically maintain a stable thermal conductivity of 140–180 W/m·K; high-thermal-conductivity grades can achieve 200–260 W/m·K, and premium custom-engineered products can even exceed 280 W/m·K. This powder features a volume resistivity of 10¹⁴–10¹⁶ Ω·cm, a breakdown field strength of 15–20 kV/mm, a dielectric constant of approximately 8.8, and exceptionally low dielectric loss. Its coefficient of thermal expansion (CTE) remains stable at 4.3–4.9 × 10⁻⁶/K—a range highly compatible with semiconductor chip materials such as single-crystal silicon, SiC, and GaN—thereby fundamentally preventing stress-induced cracking caused by thermal expansion mismatches between different materials.

Our aluminum nitride (AlN) powder is produced with strict control over key impurities, such as oxygen; for our high-end grades, oxygen content is consistently maintained below 0.5%. Across our entire product line, we ensure excellent batch-to-batch consistency in particle size distribution, precise control over impurity levels, and superior sintering activity. These powders are widely used in applications including ceramic substrates for semiconductor power devices, heat-dissipation bases for IGBT modules, thermal management components for 800G/1.6T optical modules, heat-dissipation substrates for high-power LEDs, thermally conductive fillers for high-end thermal interface materials (such as thermal adhesives and pads), high-temperature corrosion-resistant structural ceramics, and specialized refractory materials. It serves as an indispensable core raw material in the high-end electronics thermal management sector. Standardized Production Process
Our primary mass-production line utilizes the carbothermal reduction method—a mature, industry-standard process refined through years of industrial iteration. This approach ensures the stable production of high-quality aluminum nitride (AlN) powder characterized by high purity and low oxygen content:
High-purity, ultrafine aluminum oxide is precisely blended with a high-purity carbon source via wet ball milling, ensuring a thorough and uniform mixture for optimal subsequent reaction.
The mixture undergoes spray granulation to produce homogeneous granules with excellent flowability, preventing localized reaction inconsistencies that could otherwise lead to impurities.
The granulated material is fed into a high-temperature (1600–1800°C) pusher-type kiln, where a carbothermal reduction-nitridation reaction takes place under a high-purity nitrogen atmosphere, synthesizing crude aluminum nitride powder.
The crude powder undergoes high-temperature decarburization, followed by jet milling, multi-stage classification, and intensive impurity removal, allowing for precise control over the particle size distribution.
Upon request, the powder surface can be modified—including specialized treatments such as surface coating or hydrolysis-resistance enhancement—to meet specific customer requirements.
Every batch undergoes comprehensive testing for key parameters, including particle size, oxygen content, total purity, specific surface area, and crystalline phase; only material that meets all specifications is approved for warehousing.
In addition to our primary production line, we also maintain a direct nitridation line (high-temperature nitridation of aluminum powder). This enables us to rapidly respond to custom orders requiring unique specifications or specific particle size ranges, ensuring flexible production scheduling and timely delivery. End-to-End Moisture-Proof Packaging System
Given that aluminum nitride (AlN) powder is prone to hydrolysis, we have developed a multi-layered, end-to-end moisture-proof packaging solution designed to block moisture ingress at every stage:
Inner Packaging: We utilize thickened, moisture-proof aluminum foil bags, vacuum-sealed and purged with high-purity inert gas. This effectively prevents the powder from coming into contact with moisture, thereby eliminating the risk of hydrolysis and degradation at the source.
Outer Packaging: For our standard 25kg units, we use high-strength steel drums or reinforced, water-resistant cardboard drums. The exterior of each drum is treated with a waterproof coating to prevent moisture penetration.
Unitized Shipment: All drums are neatly stacked on fumigated solid-wood pallets, wrapped in high-strength stretch film for reinforcement, and fitted with rigid corner protectors to prevent damage during handling and transit.
Traceability: Each individual drum is clearly labeled with the product name, production batch number, net weight, and specifications. Every shipment includes a comprehensive factory test report for the corresponding batch, ensuring full-chain traceability.
Multi-Modal Logistics and Transportation System
Air Freight: Ideal for small-batch urgent orders or international sample deliveries. We ensure full regulatory compliance for chemical powders, implement rigorous moisture-proof reinforcement, and offer fast delivery—perfect for urgent replenishment needs.
Ocean Freight: The preferred choice for large-scale international orders. Goods are palletized and loaded into standard shipping containers, offering significant cost advantages. Comprehensive moisture and rain protection is applied throughout the journey, making it well-suited for stable, long-term export contracts.
Road Transport: Covers short-haul distribution and cross-border land routes. With flexible routing and door-to-door delivery capabilities, this option is ideal for routine replenishment for nearby or regional clients.
Rail Freight: Utilizing long-haul cross-border rail networks (such as the China-Europe Railway Express), this mode offers a cost-to-speed balance between ocean and air freight. With reliable transit times, it is an excellent solution for medium-sized, long-term, and stable international orders.