Particle & Particle Systems Characterization

Cover image for Particle & Particle Systems Characterization

April, 2009

Volume 26, Issue 1-2

Pages 3–83

  1. Contents

    1. Top of page
    2. Contents
    3. Research Articles
    4. Instructions for Authors
    5. Calendar
  2. Research Articles

    1. Top of page
    2. Contents
    3. Research Articles
    4. Instructions for Authors
    5. Calendar
    1. Analysis of a Simple Test Device for Tribo-Electric Charging of Bulk Powders (pages 7–16)

      Enes Šupuk, Christian Seiler and Mojtaba Ghadiri

      Version of Record online: 22 APR 2009 | DOI: 10.1002/ppsc.200800015

      A simple device to characterize the tribo-electric charging propensity of powders is presented. The device measures the net change of powder charge upon defined shaking in a cup. The operation of this test device is investigated for different powders and surface materials and the influence of operational parameters is shown.

    2. Comparison of Nanometric Particle Size Distributions as Determined by SAXS, TEM and Analytical Ultracentrifuge (pages 17–24)

      Verena Goertz, Nico Dingenouts and Hermann Nirschl

      Version of Record online: 22 APR 2009 | DOI: 10.1002/ppsc.200800002

      In this paper different methods to obtain the particle size distribution (PSD) of SiO2 spherical nanoparticles from small angle X-ray scattering (SAXS) are compared. Furthermore, PSDs obtained from transmission electron microscopy and analytical ultracentrifuge are compared. The respective strengths and limitations of the different methods are discussed in detail.

    3. Agglomerates Structure Characterization Using 3D-Image Reconstruction (pages 25–33)

      Christelle Turchiuli and Eduardo Castillo-Castaneda

      Version of Record online: 22 APR 2009 | DOI: 10.1002/ppsc.200700028

      An image analysis method for 3D re-construction of particle shape from silhouette and an estimate of intra-particular porosity of agglomerates is presented and applied to dehydrated milk agglomerates. Furthermore, a fractal dimension can be derived. Finally, this elucidates how instant properties of agglomerated powders are linked to the size and structure of constituting agglomerates.

    4. Feasibility of Extending Rainbow Refractometry to Small Particles Using Femtosecond Laser Pulses (pages 34–40)

      Saša Bakic, Feng Xu, Nils Damaschke and Cameron Tropea

      Version of Record online: 22 APR 2009 | DOI: 10.1002/ppsc.200700033

      Rainbow refractometry has been investigated numerically for small droplets under ultrashort pulse illumination. It is shown, that this technique works for pulse lengths as short as 10 fs and droplet diameters down to 5  μm. Overall, the possibility of improved in situ temperature measurements with Rainbow refractometry for small particles was shown to be feasible.

    5. A Neural Network Model for Estimating the Particle Size Distribution of Dilute Latex from Multiangle Dynamic Light Scattering Measurements (pages 41–52)

      Luis M. Gugliotta, Georgina S. Stegmayer, Luis A. Clementi, Verónica D. G. Gonzalez, Roque J. Minari, José R. Leiza and Jorge R. Vega

      Version of Record online: 22 APR 2009 | DOI: 10.1002/ppsc.200800010

      The particle size distribution (PSD) of dilute latex suspensions was estimated through a general regression neural network (GRNN) that was supplied with multiangle dynamic light scattering (MDLS) measurements. The results were compared to a standard Thikonov regularization technique as well as independent measurements showing very good results for the GRNN method.

    6. Diamond and Oxidized Disordered Graphite on the Surface of Gallium Phosphide Nanoparticles (pages 53–57)

      Zhao-Chun Zhang and Bao-Ping Wang

      Version of Record online: 22 APR 2009 | DOI: 10.1002/ppsc.200800054

      The X-ray diffraction pattern from gallium phosphide nanoparticles showed the presence of the diamond (111) diffraction peak. Analysis of the Raman scattering and the X-ray photoelectron spectroscopy spectrum was applied too. The results indicate the presence of oxidized disordered graphite and diamond phases.

    7. A New Approach to Model the Re-Entrainment of Settled Particles Based on Film Theory of Fluid Mass Transfer Processes (pages 58–68)

      Dirk Nitschke and Eberhard Schmidt

      Version of Record online: 22 APR 2009 | DOI: 10.1002/ppsc.200800008

      This work presents a model that calculates re-entrainment in analogy to transport processes between fluid phases, which are well known in chemical engineering. Applying film theory a parameter determining the re-entrainment rate is needed. This parameter was determined by a microscopic model. It is shown that the model is able to reproduce experimental data of the re-entrainment quite well.

    8. A Comparative Study on PSD Models for Chromite Ores Comminuted by Different Devices (pages 69–79)

      Adem Taşdemir and Tuba Taşdemir

      Version of Record online: 22 APR 2009 | DOI: 10.1002/ppsc.200800035

      This study compares the performance of particle size distribution (PSD) approximation functions when applied to chromite ores comminuted by different devices. It is shown that depending on the breakage mode different function types work better. Furthermore, a piecewise regression proved to be very useful to improve the PSD fit.

  3. Instructions for Authors

    1. Top of page
    2. Contents
    3. Research Articles
    4. Instructions for Authors
    5. Calendar
  4. Calendar

    1. Top of page
    2. Contents
    3. Research Articles
    4. Instructions for Authors
    5. Calendar

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