Editorial Feature

Aluminum Oxide, Alumina (Al2O3) Nanoparticles - Properties, Applications

Nanoparticles are being used more and more often in research and in industry, due to their enhanced properties compared to bulk materials. The benefits of nanoparticles can include increased electrical conductivity, toughness and ductility, and increased hardness and strength of metals and alloys.

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

The morphology of aluminum oxide nanoparticles is spherical, and they appear as a white powder. Aluminum oxide nanoparticles (both liquid and solid forms) are graded as highly flammable and an irritant that can cause serious eye and respiratory irritation

Chemical Properties

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

Chemical Data
Chemical symbol Al2O3
CAS No. 1344-28-1
Group Aluminum 13
Oxygen 16
Electronic configuration Aluminum [Ne] 3s23p1
Oxygen [He] 2s2 2p4
Chemical Composition
Element Content (%)
Aluminum 52.92
Oxygen 47.04

Physical Properties

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

Properties Metric Imperial
Density 3.9 g/cm3 0.140 lb/in3
Molar mass 101.96 g/mol -

Thermal Properties

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

Properties Metric Imperial
Melting point 2040°C 3704°F
Boiling point 2977°C 5391°F

Manufacturing Process

Aluminum oxide nanoparticles can be synthesized using laser ablation of an aluminum target in deionized water.


The key applications of aluminum oxide nanoparticles are listed below:

  • In integrate circuit base boards
  • Transparent ceramics, high-pressure sodium lamps, and EP-ROM window
  • In YAG laser crystals
  • As cosmetic fillers
  • Single crystal, ruby, sapphire, sapphire, and yttrium aluminum garnets
  • High-strength aluminum oxide ceramic and C substrates
  • Packaging materials, cutting tools, high purity crucible, winding axle, and furnace tubes
  • Polishing materials, glass products, metal products, semiconductor materials
  • Plastic, tape, and grinding belts
  • Paint, rubber, plastic wear-resistant reinforcement, and advanced waterproof materials
  • Catalyst, catalyst carrier, analytical reagents
  • Aerospace aircraft wing leading edges
  • Vapor deposition materials, special glass, fluorescent materials, composite materials and resins

In cases where aluminum oxide nanoparticles are used in the liquid form such as an aqueous dispersion, the key applications are as follows:

  • Plastics, rubber, ceramics, refractory products
  • To improve ceramics density, smoothness, fracture toughness, creep resistance, thermal fatigue resistance, and polymer products wear resistance
  • Ideal material of far infrared emission

Source: AZoNano


  1. Raja Devraj Raja Devraj India says:

    Please advise the properties of alumina nanofluid. Thanks

The opinions expressed here are the views of the writer and do not necessarily reflect the views and opinions of AZoNano.com.

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