LUOYANG, China — TRUNNANO, a leading innovator in advanced chemical materials, has announced a breakthrough in the production of high-purity spherical aluminum nitride (AlN) powder, overcoming long-standing technical challenges in the field. Under the leadership of CEO Roger Luo, the company's R&D team has successfully developed a proprietary plasma-assisted synthesis method that ensures superior sphericity, uniform particle size distribution, and exceptional thermal conductivity — key properties for next-generation electronic and ceramic applications.
With thermal conductivity second only to diamond and significantly higher than silicon carbide (SiC) and gallium nitride (GaN), spherical aluminum nitride has emerged as a critical material for thermal management in electric vehicles, 5G infrastructure, power electronics, and high-power LED cooling. The powder's high purity and minimal oxygen content make it ideal for thermal interface materials (TIMs) in EVs, where efficient heat dissipation is critical, as well as high-performance ceramic substrates for power electronics and additive manufacturing of complex heat-resistant components.
"Our spherical aluminum nitride powder represents a leap forward in material science," said Roger Luo, CEO of TRUNNANO. "By solving the sphericity and purity issues, we're empowering industries to push the limits of thermal management and device miniaturization."
Spherical Aluminum Nitride AlN
Why Spherical Aluminum Nitride Is the "Hidden Champion" of Thermal Management
Spherical aluminum nitride powder has long been sought after in industries such as semiconductor packaging, high-power LED cooling, and advanced ceramics due to its excellent thermal conductivity and electrical insulation properties. However, conventional production methods have historically faced three critical challenges:
Irregular particle shapes from traditional methods, compromising packing density and thermal conductivity
Oxidation issues degrading thermal properties, with oxygen contamination directly affecting performance.
Scale-up consistency problems, with batch-to-batch variation affecting reliability
TRUNNANO's R&D team overcame these obstacles through persistent experimentation, pioneering an advanced plasma-assisted synthesis technique that delivers high purity, tightly controlled particle size distribution, and exceptional sphericity. The spherical aluminum nitride product is available in multiple particle size grades, with thermal conductivity exceeding industry benchmarks across all grades. The spherical morphology enhances flowability and sintering performance, enabling higher packing density in composite materials — a critical advantage for thermal interface materials and ceramic substrates.
Plasma-Assisted Synthesis
Why Spherical Aluminum Nitride Dominates Thermal Management Applications
Aluminum nitride has emerged as a critical material in advanced materials science for three fundamental reasons:
Unmatched thermal conductivity. Spherical aluminum nitride's thermal conductivity is second only to diamond among ceramic materials, far exceeding silicon carbide (SiC) and gallium nitride (GaN). This positions spherical aluminum nitride as the best candidate for heat sinks, high-frequency electronics, and aerospace components where efficient heat dissipation is paramount. With industry-leading thermal conductivity values, spherical aluminum nitride offers thermal performance comparable to some metals while maintaining electrical insulation.
Excellent electrical insulation. Spherical aluminum nitride has extremely high electrical resistivity and a low dielectric constant, allowing reliable microwave and high-frequency applications without the risk of electrical short circuits. This unique combination — conducting heat while blocking electricity — is what makes spherical aluminum nitride indispensable in power electronics and semiconductor packaging.
Thermal expansion matching. Spherical aluminum nitride's coefficient of thermal expansion closely matches that of silicon chips, minimizing thermal stress between the chip and packaging material. This reduces the risk of delamination and failure during thermal cycling, extending device reliability and service life.
In addition, spherical aluminum nitride maintains mechanical strength even at high temperatures, further expanding its application in areas like automotive engines and aerospace.
Thermal Conductivity Comparison
EV Market Growth Driving Demand for Spherical Aluminum Nitride
TRUNNANO's innovation arrives as China's electric vehicle market accelerates at record speed. In 2024, nearly half of all car sales in China were electric — representing almost two-thirds of global EV sales — with strong year-on-year growth.
The rapid growth in EV adoption requires materials that can withstand extreme heat loads within both the batteries and the power modules. The market size for automotive thermal interface materials continues to expand rapidly. Spherical aluminum nitride's thermal conductivity, excellent electrical insulation, non-toxicity, and mechanical performance make it best suited to extend battery life and safety.
Advanced materials like spherical aluminum nitride are no longer optional but necessary for scaling next-generation mobility. As power densities continue to rise and devices become more compact, the demand for high-performance thermal management materials will only accelerate.
EV Thermal Management Demand
Key Applications of Spherical Aluminum Nitride
Spherical aluminum nitride powder enables transformative applications across multiple high-tech industries:
Thermal interface materials (TIMs) — In 5G devices and electric vehicles, spherical aluminum nitride powder serves as a high-performance filler in TIMs, efficiently transferring heat away from critical components and ensuring reliable operation under high power loads.
High-performance ceramic substrates — Spherical aluminum nitride ceramics are ideal substrates for power electronics, offering high thermal conductivity and electrical insulation to protect sensitive electronic components. The material's thermal expansion matches silicon makes it particularly suitable for high-power and high-frequency applications.
Semiconductor packaging — Spherical aluminum nitride's combination of thermal and electrical properties makes it an essential material for advanced semiconductor packaging, where heat dissipation and electrical isolation must be simultaneously addressed.
High-power LED cooling — The material enables efficient cooling of high-power LEDs, extending their lifespan and maintaining optical performance under continuous high-power operation.
Additive manufacturing — Spherical aluminum nitride powder supports the 3D printing of complex heat-resistant components, leveraging its superior flowability and sintering performance to produce intricate geometries.
Advanced ceramics and composites — As a reinforcing phase, spherical aluminum nitride improves the strength and toughness of ceramic composites, with applications in aerospace, automotive, and microelectronics.
Spherical aluminum nitride applications — from EVs to aerospace.
The Spherical Aluminum Nitride Advantage
What makes spherical aluminum nitride the "hidden champion" of thermal management materials is not just its performance, but its unique combination of properties that no single competing material offers:
Thermal conductivity second only to diamond
Excellent electrical insulation for high-power electronics
Thermal expansion coefficient matching silicon chips
High-temperature stability in demanding environments
Non-toxic and safe to handle
TRUNNANO's breakthrough in spherical aluminum nitride production removes the last barriers to widespread adoption. By achieving high purity, minimal oxygen content, tightly controlled particle size distribution, and exceptional sphericity, the company has made this "hidden champion" accessible to industries that depend on reliable thermal management.
The AlN Advantage
Supplier
TRUNNANO is a globally recognized advanced materials manufacturer and supplier with more than 12 years of expertise in high-quality nanomaterials, advanced ceramic materials, and high-purity chemicals. The company has a professional technical department and quality supervision department, a well-equipped laboratory with advanced testing equipment, and a dedicated after-sales customer service center. TRUNNANO's spherical aluminum nitride (AlN) powder is available in multiple particle size grades with high purity and thermal conductivity exceeding industry standards, suitable for thermal interface materials, power electronics, semiconductor packaging, high-power LED cooling, and additive manufacturing applications. The company serves clients across more than 50 countries and offers comprehensive technical support, from material selection to application guidance. If you are looking for high-quality spherical aluminum nitride powder, please feel free to contact us.
