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Aluminum Nitride (AlN) fillers are critical materials for thermal management in new energy vehicles (NEVs), providing a combination of high thermal conductivity (often >170 W/mK) and excellent electrical insulation. As power densities increase in EV powertrains, AlN fillers are used to dissipate heat in power modules, battery packs, and electronic control units, directly contributing to enhanced safety, efficiency, and reliability.
Key Applications of AlN Filler in NEVs
- Thermal Interface Materials (TIMs): AlN fillers are incorporated into silicone greases and pastes to bridge the interface between power chips (like SiC/GaN) and heat sinks, ensuring efficient heat transfer.
- Insulating Substrates: AlN-enhanced composites are used in power electronics, enabling the creation of compact, high-voltage insulators that prevent overheating.
- Battery Management Systems: Flexible AlN-based composite materials are used for thermal management in battery modules.
- Thermal Conductive Plastics: Used for lightweighting and heat dissipation in vehicle components.
Why AlN Fillers are Ideal for NEVs
- High Thermal Conductivity: AlN offers thermal conductivity up to 10x higher than alumina (), making it superior for managing high-power heat loads.
- Electrical Insulation: It retains excellent dielectric properties, ensuring safety in high-voltage applications.
- Coefficient of Thermal Expansion (CTE) Matching: AlN's CTE closely matches silicon (Si), SiC, and GaN, minimizing thermal stress and improving long-term reliability of power modules.
- High-Temperature Performance: It maintains stability under high operating temperatures, crucial for automotive environments.
Advancements and Market Trends
- Spherical and Nano-AlN Particles: Spherical AlN fillers are preferred for lower viscosity in polymers, allowing for higher filler loading.
- Surface Modification: To prevent hydrolysis (a common issue with AlN) and improve filler-resin adhesion, the surface of AlN powders is often modified or functionalized.
- Hybrid Fillers: Combining AlN with other materials, such as boron nitride (BN) or Carbon Nanotubes (CNTs), further enhances thermal conductivity (up to 20 W/mK or more) at lower filler loading.
- Growing Demand: The market for AlN fillers is experiencing robust growth, driven by the rapid expansion of EV production and the need for advanced thermal solutions.
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ALN Filler
jucialnglobal.com
https://www.jucialnglobal.com › aln-filler
jucialnglobal.com
https://www.jucialnglobal.com › aln-filler
It is ideal for demanding heat dissipation applications in 5G communications, new energy vehicles, power electronics, and more. Key Features: 1、Exceptional ...Read more
AlN reinforced polyethersulfone composite with stable high ...
ScienceDirect.com
https://www.sciencedirect.com › article › abs › pii
ScienceDirect.com
https://www.sciencedirect.com › article › abs › pii
by Y Zhang2025Cited by 1 — Furthermore, simulation results confirm that the introduction of AlN filler significantly improves the thermal conductivity of the composite ...Read more
Aluminum Nitride（AlN）Packages / Substrates
Kyocera
https://global.kyocera.com › ... › About Ceramic Package
Kyocera
https://global.kyocera.com › ... › About Ceramic Package
Among ceramic materials and metals, AlN offers exceptionally high thermal conductivity -- up to 10X higher than that of Alumina (Al2O3). Electrical Insulation.Read more
Thermalnite added AlN substrate | U-MAP
umap-corp.com
https://umap-corp.com › uploads › 2024/07 › Th...
umap-corp.com
https://umap-corp.com › uploads › 2024/07 › Th...
PDF
It is a fiber-like aluminum nitride single crystal, which achieves high thermal conductivity and high water resistance. As a filler material, it is expected to ...Read more
12 pages
SDK Develops Wet-Resistant Heat-Conductive Aluminum ...
Resonac
https://www.resonac.com › News Releases › 2020
Resonac
https://www.resonac.com › News Releases › 2020
Jul 14, 2020 — Showa Denko (SDK) (TOKYO: 4004) has developed wet-resistant heat-conductive aluminum nitride filler to be used as heat-radiation filler for ...Read more
Cost-effective synthesis of aluminum nitride for thermal and ...
The American Ceramic Society
https://bulletin.ceramics.org › article › cost-effective-sy...
The American Ceramic Society
https://bulletin.ceramics.org › article › cost-effective-sy...
The goal is to expand the use of aluminum nitride synthesized via this cost-effective process in thermal, light, and energy management applications. For example ...Read more
What is Spherical Aluminum Nitride Filler? Uses, How It ...
LinkedIn · BioScope Ventures
6 months ago
LinkedIn · BioScope Ventures
6 months ago
LED Manufacturing: AlN fillers are incorporated into substrates to enhance thermal management, enabling LEDs to operate at higher power levels ...Read more
Aluminum Nitride Filler Market Growth 2026-2031
Research and Markets
https://www.researchandmarkets.com › reports › aluminu...
Research and Markets
https://www.researchandmarkets.com › reports › aluminu...
Aluminum Nitride Filler finds its utility in sectors where heat dissipation is the defining performance metric. New Energy Vehicles (NEVs): This is ...Read more
The Penetration Rate Of New Energy Vehicles Is Rising, ...
SAT nano Technology Material Co., Ltd
https://www.satnanomaterial.com › the-penetration-rate-...
SAT nano Technology Material Co., Ltd
https://www.satnanomaterial.com › the-penetration-rate-...
The penetration rate of new energy vehicles is rising,and the demand for spherical alumina is increasing.
Functionalized Aluminum Nitride for Improving Hydrolysis ...
PubMed Central (PMC) (.gov)
https://pmc.ncbi.nlm.nih.gov › articles › PMC11799469
PubMed Central (PMC) (.gov)
https://pmc.ncbi.nlm.nih.gov › articles › PMC11799469
by M He2025Cited by 63 — Aluminum nitride (AlN) as a material with high thermal conductivity (λ, 170 W m−1 K−1) and excellent electrical insulation, is an ideal filler ...Read more
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