Technical Ceramics

Aluminium Nitride (AlN)

The high thermal conductivity and excellent electrical insulation makes aluminium nitride (AIN) suitable for a range of extreme environments.

Aluminium nitride is a high performance material particularly suited to demanding electrical applications. We combine expansive technical understanding with a commitment to working with customers, ensuring that our material solutions meet exacting specifications whilst providing exceptional performance.

Aluminium nitride can be produced by dry press and sinter or by hot pressing with appropriate sintering aids, the result of these processes is a material that is stable at high temperatures in a range of inert environments including hydrogen and carbon dioxide atmospheres. Aluminium nitride is principally used in the electronics area, particularly when heat removal is an important function.

Aluminium nitride properties also make it particularly useful in the creation of corrosion resistant products. Our unique approach to developing and manufacturing means that our engineers collaborate with customers to ensure that corrosion resistant products or components consistently satisfy customer requirements.

Aluminium Nitride Characteristics

  • Very good thermal conductivity
  • Thermal expansion coefficient similar to that of silicon
  • Good dielectric properties
  • Good corrosion resistance
  • Stability in semiconductor processing atmospheres

Aluminium Nitride (Mac-AN985W)

Property

Metric

Imperial

Colour

Grey

Bulk density (fired)

Mg/m3

3.3

lb/in3

0.12

Grain size

μm

7

Porosity

% nominal

0 (fully dense) 

Flexural strength

MPa

285

lb/in2

41,000

Young’s modulus

GPa

310

M.lb/in2

45

Shear modulus

GPa

132

M.lb/in2

19

Poisson's ratio

0.21

Thermal conductivity

W/m.K

175

Thermal expansion coefficient

x10-6 /°C @RT-400°C

3.6

x10-6 /°F @750°F

2.0

Dielectric constant

@1 kHz

8.8

Volume resistivity

ohm.cm @RT

>1013 

Aluminium Nitride Applications

  • Heat sinks
  • Electronic substrates
  • IC packages
  • Power transistor bases
  • Microwave device packages