Alumina Powder

Measurement of Dispersion Quality of Submicron Alumina Powder in Water

Alumina (Al2O3) is an important ceramic material for industrial applications. The numerous fields of application range from construction materials, to filling materials, as well as abrasives and catalysts. In plants and mechanical engineering, alumina ceramics are mainly used for wear and corrosion protection. The particle size distribution largely determines the application range and the quality of an alumina powder. Reliably identifying the differences in particle size is therefore an essential requirement of the measuring instrument.

The submicron particles of aluminium oxide must often be reprocessed as a suspension in order to incorporate them in a bid to optimally improve the product’s properties. The challenge here is to produce stable dispersions. Agglomerates may affect the functionality of the product.

The photon cross-correlation spectroscopy (PCCS) means the analysis results are independent of the particle concentration. It allows measurements of the dispersion quality to be made, even in highly concentrated suspensions. The strengths of NANOPHOX are in the broad concentration range, in the sensitive resolution of bimodal particle distributions and in the sensitive response to changes in size.

Particle size distribution of alumina powder

  • Particle size distribution is vital for utilisation, processing and quality of alumina
  • Reliable measurement of aluminum oxide as a powder and suspension
  • Early identification of the formation of agglomerates
  • Direct measurement of stabilisation kinetics in turbid dispersions

Download application note for detailed information

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Application strengths

  • High sensitivity to changes in the size and particle formation | also in-situ
  • Resolution of bimodal particle distributions in primary particles and agglomerates
  • Quick and simple measurement
  • Less overhead for sample preparation | concentration-independent measurement with PCCS

Customer benefits

  • Improvement of product quality
  • Optimisation of monodispersity of the particle size distribution
  • Control of long-term stability of suspensions

Typical configuration



DLS | Nanoparticles
Size range: 0.5 nm - 10,000 nm
Analysis volume: 50 µl - 4 ml