AlN Ceramic & Powder: Technology and Applications

Aluminum Nitride (AlN) powder features high thermal conductivity (320 W/(m·K) theoretical) and a thermal expansion coefficient matching silicon, making it ideal for ceramic substrates in semiconductor power devices, IGBT modules, and high-power LEDs. With thermal conductivity 6-10× higher than alumina, AlN is replacing alumina in 5G communications, new energy vehicles, and photovoltaic inverters. Buyers seeking cost-effective AlN powder or high-purity AlN powder should carefully select a reliable AlN manufacturer.

I. AlN Powder Preparation

High-purity AlN powder is key to high-performance substrates. Carbothermal reduction is the most mature commercial method, producing powder with high sphericity and purity. Hydrolysis resistance is critical—surface modification (e.g., nano-coating) addresses this. Customers asking which high-purity AlN powder manufacturer is the best prioritize hydrolysis resistance and batch consistency.

II. AlN Ceramic Sintering

Sintering aids (e.g., Y₂O₃) enable liquid-phase sintering and oxygen removal, boosting thermal conductivity. Pressureless sintering is standard for AlN substrates; advanced processes like SPS or HIP serve higher-performance needs.

III. Product Types

- AlN heat dissipation substrates: For IGBT/LED thermal management; processable into AlN direct bonded copper substrates

- AlN ceramic rods: Cylindrical structural components

- AlN ceramic microspheres: Thermal fillers, grinding media, or granulated raw materials for dry-pressed substrates

- Complex shapes via AlN ceramic machining

Engineers often compare AlN vs. silicon nitride for specific thermal and mechanical requirements.

IV. Market

Xiamen Juci has localized AlN ceramic substrates and high-purity AlN powder production. China's 2023 AlN market reached ~1.56 billion RMB, with global growth from $169M (2025) to $258.8M (2032), showing strong domestic substitution potential.

Xiamen Juci specializes in the R&D, production, and sales of AlN powder and AlN ceramic structural components, possessing mature production technologies and a comprehensive service system with reliable quality and stable supply. For those in need of AlN powder and related products, please feel free to contact us at any time, and we will provide you with professional solutions.

Contact: Jenny Qin / 진현혜

Xiamen Juci Technology Co., Ltd.

Phone: +86 151-5177-8700

Email: qinxianhui@chinajuci.com

Website: www.jucialnglobal.com