Aluminum Nitride (AlN) Overview

Ortech Inc. provides state-of-the-art Aluminum Nitride (AlN) manufactured by the most cost-effective processes. Ortech also maintains efficient, large-scale manufacturing facilities that support quick-turn prototype development and high-volume production. AlN has found to replace beryllium oxide (BeO) in the semiconductor industry due to BeO’s toxicity, in addition to the thermal expansion coefficient of AlN is lower than BeO or Alumina, and closely matches that of the Silicon wafers used in electronics. Electronic and structural grades of this material exist, classified as such by the thermal conductivity, which is controlled by the purity of the AlN. Pristine material is white, high-purity is tan, and a gray color indicates contaminants.

Aluminum Nitride (AlN)

Manufacturing Processes

  • Injection molding
  • Roll compacting
  • Co-firing
  • Isostatic pressing
  • Dry pressing
  • Hot pressing
  • Tape casting
  • Slip casting

Advanced Finishing Services

  • Precision grinding and lapping
  • Laser machining
  • Engineering design and support
  • Metallizing
  • Ceramics-to-metal brazing
  • Threaded components
  • Precision motion components
  • Complex cleanroom assemblies

Material Properties Chart

Aluminum Nitride
Density g/cm3 3.26
Crystal Size Average Microns 3
Water Absorption % 0
Gas Permeability – 0
Color – Gray
Flexural Strength (MOR) 20° C MPa (psi x 103) 340
Elastic Modulus 20° C GPa (psi x 106) 330
Poisson’s Ratio 20° C – 0.25
Compressive Strength 20° C MPa (psi x 103)
Hardness Rockwell R45N
Tensile Strength 25° C MPa (psi x 103)
Fracture Toughness K(I c) MPam1/2 3
Thermal Conductivity 20° C W/m K 180.0
Coefficient if Thermal Expansion 25-1000° C 1X 10-6/°C 5.0
Specific Heat 100° C J/kg*K 740
Thermal Shock Resistance Δ Tc °C
Dielectric Strength 6.35mm ac-kV/mm (ac V/mil) 17
Dielectric Constant 1 MHz 25° C 9
Dielectric Loss (tan delta) 1 MHz 25° C  <0.001
Volume Resistivity 25° C ohm-cm
Volume Resistivity 500° C ohm-cm
Volume Resistivity 1000° C ohm-cm

Our products with Aluminum Nitride (AlN)