Aluminum Nitride Nanoparticles - Properties, Applications

Topics Covered

Introduction
Chemical Properties
Physical Properties
Thermal Properties
Manufacturing Process
Applications

Introduction

Nanoparticles are enjoying more and more attention nowadays, deservedly so as their myriad of benefits are being discovered every day. The key benefit of nanoparticles is that their properties differ from bulk material of the same composition. Nanoparticles can be altered by varying their shape, size, and chemical environment.

This article discusses about the properties and applications of aluminum nitride nanoparticles. Aluminum is a Block P, Period 3 element, while nitrogen is a Block P, Period 2 element.

Aluminum is a soft metal that is brittle but strong. Nitrides are a class of chemical compounds in which nitrogen is combined with an element of similar or lower electronegativity.

The morphology of aluminum nitride nanoparticles is spherical, and their appearance is an off-white powder. Aluminum nitride nanoparticles are known for their small particle size distribution, high heat resistance, high surface activity, high level of purity, firmness, large specific surface area, low bulk density, and good performance of injection molding. These can be readily used with composite materials, and are a good match with the semiconductor silicon. They can improve the mechanical properties of composite materials and the thermal conductivity of dielectric.

Aluminum nitride nanoparticles are graded as irritants that can cause severe skin burns and eye damage. If inhaled, there are chances of allergy, asthma symptoms or breathing difficulties occurring.

The dispersion performance of aluminum nitride nanoparticles will be affected by damp reunion, hence they must be sealed in vacuum and stored in cool and dry environment.

Chemical Properties

The chemical properties of aluminum nitride nanoparticles are outlined in the following table.

Chemical Data
Chemical symbol AlN
CAS No. 24304-00-5
Group Aluminum 13
Nitrogen 15
Electronic configuration Aluminum [Ne]3s23p1
Nitrogen [He]2s22p3
Chemical Composition
Aluminium / Aluminum, Al 65.8 %
Nitrogen, N 34.2 %

Physical Properties

The physical properties of aluminum nitride nanoparticles are given in the following table.

Properties Metric Imperial
Density 3.26 g/cm3 0.117 lb/in3
Molar mass 40.99 g/mol -

Thermal Properties

The thermal properties of aluminum nitride nanoparticles are provided in the table below.

Properties Metric Imperial
Melting point 2200 °C 3992°F
Boiling point 2517 °C 4563°F

Manufacturing Process

Aluminum nitride nanoparticles can be synthesized using a reactive gas condensation (RGC) technique. In this process, ammonia and nitrogen gases were used for the nitridation of aluminum, where ammonia acts as the reactive gas and nitrogen acts as a carrier gas as well as an inert source for particle condensation.

X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) can be used to test the results.

Applications

The key applications of aluminum nitride nanoparticles are listed below:

  • In coatings, plastics, and wire to improve the thermal conductivity of plastic
  • For manufacturing integrated circuit board, optical devices, radiator, electronic devices and high temperature crucible
  • Fabrication of metal matrix and polymer matrix composites, especially in the heat seal adhesives and electronic packaging materials
  • In high thermally conductive ceramics and composite ceramics such as evaporation boats and heat sinks
  • Electrically insulating packages for electronics
  • Crucibles for metals and salt melts
  • In aerospace to improve thermomechanical properties
  • Thermally conductive filler for polymers
  • Components for wafer processing
  • To improve the performance of epoxy resin
  • As a kind of reinforcing agent
  • As heat conductive material

Source: AZoNano

 

Date Added: Apr 3, 2013 | Updated: Jul 19, 2013
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