Aluminum Nitride (AlN) Ceramics: High Thermal Conductivity Substrates, Plates & Heat Sinks
We supply industrial-grade aluminium nitride (AlN) ceramic components for high-power, high-temperature, and electrically insulated applications across power electronics, laser modules, RF systems, industrial heating, and precision instruments. Product scope covers AlN substrates, plates, heat spreaders, PCB bases, rings, rods, machined blocks, and custom-shaped parts based on drawings or prototypes.
With factory-direct production, CNC precision processing, tolerance stability, and engineering collaboration, we support standard specifications and customized parts.
✅ Send your drawings or specifications — we help turn concepts into production-ready AlN ceramic parts.
Is Aluminum Nitride (AlN) a ceramic?
Yes–Aluminium nitride (AlN) is a non-oxide advanced ceramic with a hexagonal wurtzite crystal structure, where Al and N atoms form strong covalent tetrahedral bonding in a highly ordered lattice. It is typically produced through powder synthesis, forming, and high-temperature sintering, resulting in a dense, electrically insulating, and thermally conductive ceramic material suitable for high-power and high-frequency applications.
China Aluminium Nitride Ceramic Products
ADCERAX manufactures aluminium nitride (AlN) ceramic products in various shapes including substrates, plates, tubes, rings, rods, blocks, and custom-machined parts, supporting both standard sizes and tailored specifications.
Efficient heat dissipation and electrical insulation for compact power modules, LEDs, and laser diode packages.
Spreads heat across larger surfaces while providing electrical insulation and stable support for electronic assemblies.
Combines electrical insulation with heat transfer for sensor housings, gas channels, and heating assemblies.
Combines electrical insulation, efficient heat transfer, and stable structural support for positioning posts and heating assemblies.
Provides efficient heat transfer and material containment for melting and evaporation processes under controlled atmospheres.
Provides electrical isolation, precise spacing, and stable support for power modules, laser assemblies, and heating equipment.
Combines electrical insulation and heat transfer in a compact spherical form for positioning and contact applications.
Provides structural support and electrical insulation while transferring heat in sensing and heating assemblies.
Spreads heat efficiently while maintaining electrical isolation in power modules, LEDs, laser systems, and compact electronic assemblies.
Aluminum Nitride (AlN) Ceramic Properties
Aluminium nitride (AlN) ceramics combine high thermal conductivity, electrical insulation, and low thermal expansion, supporting efficient heat transfer and dimensional stability in demanding electronic and industrial applications.
Aluminum Nitride Ceramic Technical Data
| Material Property | Unit / Condition | AD-ALN-170 | AD-ALN-200 | AD-ALN-230 |
|---|---|---|---|---|
| Thermal Conductivity | W/(m·K); 20 °C; selection minimum | ≥170 | ≥195 | ≥225 |
| Coefficient of Linear Thermal Expansion | 10⁻⁶/K; RT to 300 °C | 4.6 | 4.6 | 4.6 |
| Flexural Strength | MPa; selection value | 450 | 400 | 350 |
| Volume Resistivity | Ω·cm; 20 °C | >10¹⁴ | >10¹³ | >10¹³ |
| Dielectric Strength | kV/mm; selection minimum | ≥15 | ≥15 | ≥15 |
| Relative Permittivity (Dielectric Constant) | Dimensionless; 1 MHz | 9.0 | 8.7 | 8.5 |
Advantages of Aluminium Nitride Ceramic
Delivers efficient heat spreading while maintaining strong dielectric strength, suitable for power electronics, laser modules, RF systems, and high-density packaging.
Maintains dimensional accuracy and mechanical integrity during rapid heating, cooling, and continuous thermal cycling in high-power systems.
Reduces thermal mismatch stress with Si, GaN, and related semiconductor materials, improving long-term reliability in electronic assemblies.
Supports rapid sampling, CNC machining, tight tolerances, and non-standard geometries for heat spreaders, substrates, plates, rings, blocks, and engineered components.
China Aluminium Nitride Ceramic Products
AlN ceramics combine exceptional thermal conductivity (170-230 W/m·K) with excellent electrical insulation and a CTE closely matched to silicon. They are the optimal choice for thermal management in high-power electronics and optoelectronics.
AlN Ceramics Are the Best Choice When:
| Your Application Requirement | Why AlN Excels | Recommended Product |
|---|---|---|
| IGBT / MOSFET power modules | 170-230 W/m·K thermal conductivity; CTE matched to Si (4-5 ppm/K) | AlN Substrates, Heat Sinks |
| GaN / SiC power devices | Low CTE reduces thermal stress; high-temp stability to 1100°C | AlN Substrates, Plates |
| High-power LED heat dissipation | Efficient heat spreading prevents junction temperature rise | AlN Substrates, Heat Sinks |
| Laser diode / VCSEL mounting | Ultra-flat surfaces; dimensional stability under thermal cycling | AlN Substrates, Plates |
| RF / microwave module carriers | Low dielectric constant (8-9); stable permittivity | AlN Substrates, Rings |
| Hermetic electronic packaging | Excellent metallization compatibility; supports Au/Ni plating, DBC/DPC | AlN Substrates, Custom Parts |
| High-temperature insulation | Max operating temperature 1100°C; volume resistivity >10¹⁴ Ω·cm | AlN Tubes, Rods |
| EV inverters / motor controllers | Handles high power density; stable under continuous thermal cycling | AlN Substrates, Heat Sinks |
When AlN Ceramics May Not Be Optimal
While AlN offers excellent thermal conductivity, it may not be the best choice in the following situations:
For these cases, our engineers can help you evaluate options from our full range of advanced ceramic materials.
Alumina (Al₂O₃) offers lower cost with 20-30 W/m·K thermal conductivity
Silicon Nitride (Si₃N₄) has higher fracture toughness
AlN needs inert or vacuum use
Silicon Carbide (SiC) may be more suitable
Which AlN Grade Do You Need? — Quick Selection Guide
Note: Higher thermal conductivity grades typically have higher cost. Our engineers can help you select the optimal grade based on your thermal design requirements and budget constraints.
Cost-effective thermal management
Recommended Grade: ALN-170
Thermal Conductivity: 170-190 W/m·K
Best For: General LED, moderate power devices, cost-sensitive applications
Balanced performance
Recommended Grade: ALN-200
Thermal Conductivity190-220 W/m·K
Applications: IGBT modules, high-power LED, standard power electronics
Maximum heat dissipation
Recommended Grade: ALN-230
Thermal Conductivity: 220-230 W/m·K
Applications: GaN/SiC devices, laser diodes, high-frequency RF, demanding thermal applications
AlN vs Other Thermal Management Ceramics — Quick Comparison
Why choose AlN over BeO? AlN offers comparable thermal performance to BeO without the toxicity concerns, making it the preferred choice for most commercial and industrial applications.
Aluminum Nitride (AlN)
Thermal Conductivity:170-230 W/m·K 
CTE (ppm/K): 4-5 (matches Si)
Electrical Insulation: Excellent
Mechanical Strength: Medium
Cost: High
Best For: Power electronics, LED, laser, RF
Thermal Conductivity:20-30 W/m·K
CTE (ppm/K):7-8
Electrical Insulation: Excellent
Mechanical Strength: Medium
Cost: Low
Best For:General insulation, lower thermal needs
Thermal Conductivity: 20-35 W/m·K
CTE (ppm/K):3-4
Electrical Insulation: Good
Mechanical Strength:Very High
Cost: High
Best For: General insulation, lower thermal needs
Thermal Conductivity: 250-330 W/m·K
CTE (ppm/K): 7-8
Electrical Insulation: Excellent
Mechanical Strength: Medium
Cost: Very High + Toxic
Best For: Aerospace (restricted use)
💡 Built for Thermal Management, Electrical Isolation, and Dimensional Stability — AlN Ceramics by ADCERAX.
We provide AlN substrates and custom-machined parts for applications requiring high thermal conductivity, electrical insulation, and controlled thermal expansion. Components are manufactured with tight tolerances, stable microstructure, and reliable performance under thermal cycling.
Share drawings or specs — we will confirm feasibility and supply a buildable AlN solution. 👉
Aluminum Nitride (AlN) Ceramic Applications
Aluminium nitride ceramic supports heat management and electrical insulation in power electronics, LED packaging, RF hardware, and precision industrial systems. It is used for substrates, heat spreaders, bases, and insulating fixtures.
Power Electronics & Inverters
Application:
Aluminium nitride (AlN) ceramics are used as thermal and electrical insulation carriers in IGBT/MOSFET power modules, AC-DC / DC-DC converters, industrial inverters, welding power supplies, and motor control units to manage increasing heat density and long-cycle power operation.
Challenge & ADCERAX Solution:
High power modules often encounter heat concentration, thermal stress between silicon chips and carrier plates, and insulation reliability concerns during long-term operation. ADCERAX supports these applications with high-purity aluminium nitride ceramics featuring ≥170 W/m·K thermal conductivity, a silicon-matched CTE, controlled flatness, and precision machining for holes, slots, chamfers, and metalization-ready surfaces, enabling stable and efficient thermal design.
LED, Laser & Optoelectronics Packaging
Application:
AlN ceramics are applied as thin thermal carriers and structural bases in COB LED modules, laser diode mounts, fiber-optic components, RF optical amplifiers, and high-density device packaging where temperature, optical stability, and compact footprint are critical.
Optoelectronic devices face optical power decay, temperature drift, and dimensional stability issues caused by localized heat and packaging stresses. ADCERAX offers ultra-flat and low-warp AlN ceramic plates with optional precision-polished surfaces, thin-profile machining capability, and customizable alignment features to enhance optical output stability and packaging consistency.
RF, Microwave & Telecom Modules
Application:
AlN ceramics serve as high-frequency carrier substrates and thermal bases for microwave filters, RF amplifiers, mmWave communication modules, and compact high-frequency electronic units.
🧩Challenge & ADCERAX Solution
RF and microwave modules require low dielectric loss, stable permittivity, precise thin-section fabrication, and repeatable dimensional accuracy to avoid signal degradation. ADCERAX provides aluminium nitride ceramic substrates with stable dielectric properties (≈8.7–9), reliable thermal conduction, and controlled tolerances and planarity to support prototype validation and scalable production with reduced performance deviation.
Industrial Heating & Smart Equipment
Application:
AlN ceramics are used in industrial heaters, high-temperature insulation blocks, vacuum or inert-gas environment supports, and thermal exchange structural pieces where stable insulation and heat dissipation must coexist at elevated temperatures.
🧩Challenge & ADCERAX Solution:
Industrial equipment commonly faces long-term thermal cycling, dimensional drift, and insulation reliability challenges when using conventional ceramic materials. ADCERAX supplies dense and high-purity AlN ceramics with stable thermal conductivity, electrical insulation, and strength retention under elevated temperatures, combined with CNC machining capability for complex shapes, mounting holes, slots, recesses, or positioning interfaces.
Customized Aluminum Nitride Ceramics supplier
ADCERAX manufactures custom aluminium nitride (AlN) components in China to your drawings, samples, or specifications. We offer precision machining, flexible MOQs, and engineering support for thermal management, power electronics, and laser systems. Typical delivery is 3–9 weeks, depending on part size and machining complexity.
Customization Options
Extra-large / Extra-small diameters, non-standard thicknesses, and ultra-long / ultra-short lengths.
Provide higher - level dimensional accuracy and concentricity control than the standard.
Flanges, steps, threads, drilling holes, grooves, etc.
Adjust the material according to the application requirements.
Polish and grind the surface to achieve a specific surface roughness.
Customization Process
Send us your drawing, CAD file, or physical sample with material grade, dimensions, tolerances, and quantity. Our engineers will evaluate the design and provide a detailed quotation with lead time and pricing.
Once the quote is approved, we proceed with sample prototyping (1–50 pcs) if needed, for testing and validation.
After sample approval or direct confirmation, we begin batch manufacturing using CNC machining, sintering, and polishing. All parts undergo dimensional checks, material purity testing, and surface finish inspection.
Finished products are securely packed and shipped via DHL/FedEx/UPS or your preferred method. We support global delivery with full documentation.
Aluminium Nitride (AlN) Ceramic Factory with Advanced Processing
Aluminium nitride (AlN) ceramic combines high thermal conductivity with electrical insulation. ADCERAX provides forming, CNC machining with diamond tools, and finishing to produce precision components for industrial and electronic applications.
AlN Ceramic Machining Capacity
🔷Forming & Sintering: Aluminium nitride powders are formed and sintered to produce dense ceramic bodies with high thermal conductivity and electrical insulation.
🔷Diamond CNC Machining: Diamond grinding and multi-axis CNC allow holes, thin walls, slots, and flat parts with ±0.02–0.05 mm tolerances.
🔷Finishing & Customization: Available polishing, lapping, chamfering, and surface prep for substrates, heat spreaders, PCB bases, and thermal parts.
🔷Stable Batch Manufacturing: Controlled processes reduce warpage and micro-cracks, ensuring consistent quality from samples to bulk orders.
AlN Ceramic Manufacturing Strengths
- Thermal-Critical Parts Machinability
Despite its hardness, AlN can be diamond-machined into thin-wall, flat, and tight-tolerance parts for substrates, heat spreaders, tubes, and plates without compromising thermal performance. - Stable Dimensional Accuracy
Low thermal expansion and uniform microstructure allow ±0.02–0.05 mm tolerance control, reducing deformation during forming, sintering, and secondary machining. - Consistent Surface Quality for Bonding & Metallization
AlN supports polishing, lapping, and metallization-ready finishing, enabling reliable soldering, DBC/DPC, Au/Ni plating, adhesive bonding, and vacuum mounting.
Why Choose ADCERAX for Your Aluminum Nitride Ceramic Supplier?
Your choice of aluminium nitride (AlN) ceramics manufacturer affects your system’s thermal performance, reliability, and total operating cost. ADCERAX provides high-purity AlN materials, precision CNC machining, and engineering support for thermal management, power electronics, and high-precision industrial applications.
Factory Direct & Competitive Pricing
Direct manufacturer eliminating intermediaries for cost-effective solutions without compromising quality.
Expert Engineering Support
20+ years of B2B experience providing unparalleled technical support and collaborative design.
Flexible Customization
Agile manufacturing for small-batch customization and rapid prototyping capabilities.
Quality Control
Stringent quality measures from raw material inspection to final product testing.
24/7 Technical Support
24-hour response guarantee with dedicated support for global clientele.
500+ Satisfied Customers
Trusted by global customers for advanced ceramic materials and precision components.
Aluminum Nitride Ceramic Products Quality & Certifications
FAQ
| Performance Aspect | Aluminium Nitride (AlN) | Alumina (Al₂O₃) | Silicon Nitride (Si₃N₄) |
|---|---|---|---|
| Thermal Conductivity | ★★★★★ (140–180 W/m·K+) | ★★☆☆☆ (15–30 W/m·K) | ★★★☆☆ (20–35 W/m·K) |
| Electrical Insulation | Excellent | Good | Good |
| Thermal Expansion (CTE) | Close to silicon | Higher | Moderate |
| Mechanical Strength | Medium | Medium | Very high |
| Ideal Use Cases | Power electronics, laser modules, RF & high-density packaging | General industrial ceramics | High-load, high-shock mechanical systems |
Yes, For specialized optics and sensing,aln transparent ceramics can be used where partial light transmission is required together with high thermal conductivity. These materials are niche but demonstrate the versatility of aluminium nitride ceramic.
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