Technische Universität Bergakademie Freiberg

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Research data repository of Freiberg University of Mining and Technology.

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Browsing Technische Universität Bergakademie Freiberg by Subject "4::42"

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  • ItemOpen Access
    Dataset for publication ``A bin-resolved statistical framework for comparing particle size distributions''
    (Technische Universität Bergakademie Freiberg, 2026-07-23) Mitra, Rahul
    This dataset accompanies the study introducing the Difference Significance Profile (DSP), a statistically rigorous framework for bin-resolved comparison of particle size distributions (PSDs). It contains particle-level size measurements obtained by in-line SOPAT imaging of spray-dried alumina powders, together with all processed data required to reproduce the statistical analyses presented in the associated publication. The repository includes raw particle-size data, common binned PSDs, probability differences, bin-wise DSP statistics, bootstrap calibration results, covariance matrices, and comparison-level summary statistics for two experimental scenarios: (i) powders produced under different spray-drying temperatures (120 °C and 145 °C) and (ii) repeated experiments under identical conditions (120 °C) to assess repeatability. Additionally, mercury intrusion porosimetry measurements for the two temperature conditions are provided to support the physical interpretation of the observed PSD differences. The dataset enables complete reproduction of the DSP analysis, facilitates benchmarking against alternative PSD comparison methods, and provides a reusable resource for statistical analysis of particle size distributions in particle technology and related fields.
  • ItemOpen Access
    Epoxy-Based Particle Sample Preparation with Nano-Graphite as Spacer - RAW Data (Particle Sample Preparation) - Different mixtures (by volume) of graphite-nanoparticles and analysis particles
    (Technische Universität Bergakademie Freiberg, 2020-05-08) Ditscherlein, Ralf
    To get good image segmentation results in tomographic analysis methods, particles has to be seperated from each other while embedding them into a matrix. Low X-ray absorbing nano-graphite below the voxel resolution of the system is mixed with the analysis particles to form a shell to avoid direct particle-particle contact. After mixing it with epoxy resin, the paste is sucked into a polymeric tube of 2 mm inner diameter. After hardening, the formed cylinder was scanned with an X-ray microscope (ZEISS Xradia Versa 510) with the following parameters: 80 keV, 7 W, 360°, 2001 projections, 1 s exposure time, 2 µm voxel size, binning 2. After scannning, the following filters were applied while reconstruction with ZEISS reconstructor: Beam Hardening Correction 0.05, Smoothing 0,7. Detailed overview of the parameters is summarized as screenshots within the repository. To determine an optimal mixture of the two components, the following volume-fractions were analysed: Nanoparticle:Particle 20vol-%:80vol-% 40vol-%:60vol-% 60vol-%:40vol-%
  • ItemOpen Access
    Filtration and Particle Discrete Data (glass beads < 160 µm) for 'Project Development of multivariant structure and process models for filter cakes, combining experimental methods of process engineering with digital computer based methods'
    (Technische Universität Bergakademie Freiberg, 2026-04-29) Löwer, Erik
    This dataset contains primary experimental data investigating the filtration behavior and particulate properties of glass particles, spherical, < 160 µm. The data was generated through separation tests conducted in accordance with the VDI 2762 guideline (cake-forming filtration). The study aims to correlate particle morphology with specific filter cake resistance within a viscous medium. Soda-lime glass (SiO2, 2.55 g/cm³) from Sigmund Lindner GmbH, was used as the disperse phase. To ensure a defined particle size distribution, the material was pre-classified to a target range of 70 to 160 µm using a Nisshin Turbo Classifier TC-15M fine air classifier. The continuous medium consisted of a binary water-glycerin mixture: Glycerin content: 24 mass percent (wt%) Additive: 25 mM potassium iodide (KI). Both chemicals were sourced in analytical grade from Carl Roth GmbH + Co. KG. Complementary 3D-characterization data, including CT scans (Computed Tomography) and segmented individual particle data, are archived in the "Parrot" database of the TU Bergakademie Freiberg (https://parrot.tu-freiberg.de/).
  • ItemOpen Access
    Filtration and Particle Discrete Data (quartz < 200 µm) for 'Project Development of multivariant structure and process models for filter cakes, combining experimental methods of process engineering with digital computer based methods'
    (Technische Universität Bergakademie Freiberg, 2026-04-29) Löwer, Erik
    This dataset contains primary experimental data investigating the filtration behavior and particulate properties of quartz particles. The data was generated through separation tests conducted in accordance with the VDI 2762 guideline (cake-forming filtration). The study aims to correlate particle morphology with specific filter cake resistance within a viscous medium. Quartz (SiO2, 2.7 g/cm³) from Strobel Quarzsand GmbH, product name BCS201, was used as the disperse phase. To ensure a defined particle size distribution, the material was pre-classified to a target range of 50 to 200 µm using a Nisshin Turbo Classifier TC-15M fine air classifier. The continuous medium consisted of a binary water-glycerin mixture: Glycerin content: 24 mass percent (wt%) Additive: 25 mM potassium iodide (KI). Both chemicals were sourced in analytical grade from Carl Roth GmbH + Co. KG. Complementary 3D-characterization data, including CT scans (Computed Tomography) and segmented individual particle data, are archived in the "Parrot" database of the TU Bergakademie Freiberg (https://parrot.tu-freiberg.de/).
  • ItemOpen Access
    Research data on vapor-liquid equilibria of organic carbonates (DMC, EMC, DEC, EC, and PC) at 101.3, 25.0, and 5.0 kPa, as well as vapor pressure data
    (Technische Universität Bergakademie Freiberg, 2026-08-25) Goldberg, Tom
    The reported data correspond to the following publication: Tom Goldberg, Volker Herdegen, Andreas S. Braeuer “Isobaric vapor-liquid equilibria of binary and multicomponent organic carbonate mixtures (DMC, EMC, DEC, EC, and PC) at 101.3, 25.0, and 5.0 kPa” Journal of Chemical & Engineering Data, 2026 All measurements were carried out using the all-glass dynamic recirculation still “Labodest VLE 602” (i-Fischer Engineering GmbH, Germany). Detailed information about the materials, experimental setup, experimental procedure, and standard uncertainties can be found in the associated publication. The file “Vapor_pressure_data.txt” contains vapor pressure data for each of the five pure organic carbonates: dimethyl carbonate (DMC), ethyl methyl carbonate (EMC), diethyl carbonate (DEC), ethylene carbonate (EC), and propylene carbonate (PC). The file “Binary_VLE_data.txt” contains binary vapor-liquid equilibrium (VLE) data for all 10 binary combinations of the five organic carbonates. The measurements were performed at 101.3 kPa and 25.0 kPa, with the exception of the PC–EC system. For PC–EC, measurements were performed at 25.0 kPa and 5.0 kPa due to observed thermal degradation at temperatures above approximately 483–493 K. The file “Multicomponent_VLE_data.txt” contains ternary VLE data for the systems DMC–EMC–DEC, DMC–DEC–PC, and EMC–PC–EC, as well as quinary VLE data.