Aluminium Nitride
Non-oxide ceramic with the highest thermal conductivity among electrical insulators (170–230 W/m·K). Excellent dielectric properties, CTE closely matching silicon wafers (4.5×10⁻⁶/K). Density 3.3 g/cm³, flexural strength 300–400 MPa, hardness 11 GPa. Alternative to toxic BeO in semiconductor packaging. Applications: power electronic substrates (IGBT, MOSFET), LED heat sinks, laser diode mounts, microwave components, electrostatic chucks.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇩🇪 | CeramTec | Germany | Alunit | — | % |
| 🇯🇵 | Kyocera | Japan | AN-230 | — | % |
| 🇬🇧 | Precision Ceramics | United Kingdom | PCAN1000/3000 | — | % |
| 🇯🇵 | Tokuyama | Japan | SH-15/SH-50 | — | % |
| 🇯🇵 | Maruwa | Japan | HA-230 | — | % |
Sources: ceramtec.com, kyocera.com, precision-ceramics.com, tokuyama.co.jp, maruwa-g.com
Mechanical properties
Compatibility verdict
Aluminium Nitride and Alunit: null% composition match
Related materials
Aluminium Oxide (Alumina) 99.5%
The most widely used engineering ceramic. Alpha-phase alumina (99.5% Al2O3) offers exceptional hardness (1440 HV), excellent dielectric properties, high compressive strength (2600 MPa), good thermal conductivity (35 W/m·K), and outstanding chemical resistance. Usable to 1750°C. Applications include wear pads, seal rings, substrates, thread guides, grinding media, furnace tubes, ballistic armor, and high-voltage insulators. Available in purities from 94% to 99.8%.
Zirconium Oxide (Zirconia) Y-TZP
Yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP). The toughest engineering ceramic with transformation toughening mechanism. Exceptional flexural strength (900–1200 MPa), high fracture toughness (5–10 MPa·m½), density 6.05 g/cm³, elastic modulus ~200 GPa. Low thermal conductivity (2–3 W/m·K) makes it a good thermal insulator. Applications: precision bearings, cutting blades, dental implants, fuel cell components, wear-resistant parts, thread guides.
Silicon Nitride
High-performance non-oxide ceramic with the highest fracture toughness among engineering ceramics (6–8 MPa·m½). Interlocking rod-like β-Si3N4 microstructure provides excellent thermal shock resistance. Flexural strength 690–830 MPa, density 3.27–3.29 g/cm³ (lightweight), thermal conductivity 29–30 W/m·K. Hardness 1450–1580 HV. Applications: precision bearing balls and rollers, cutting tools, turbocharger rotors, engine valves, metal forming dies, weld positioners.
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