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10 results for “Ceramic Analysis”
pXRF analysis of medieval and modern ceramics from Erbray (France)
<p>This dataset contains analyses of 60 ceramic samples from Les Landelles (Erbray, Loire-Atlantique, France). The chemical composition of the samples was obtained by portable X-ray fluorescence spectrometry (pXRF).</p> <p><strong>Method</strong></p> <p>The outer surfaces of all the samples were mechanically removed prior to analysis.</p> <p>The samples were heated to 950°C for one hour after 24h drying at 50°C, weighted for LOI calculation and ground in a tungsten carbide mortar. Measurements were made on pelletized powders.</p> <p>Measurements were carried out on powders placed in sample holders, through a Mylar film.</p> <p>A Vanta VCR C-series portable X-ray fluorescence spectrometer (Olympus) was used on a laboratory bench with a beam diameter of 10 mm. The spectrometer is equipped with a 4W, 40kV max, 200 µA max X-ray tube (Rh anode) and a silicon drift detector (SDD). For each analysis, the instrument was operated alternately at low energy (10 keV) for 90 s to quantify light elements and at high energy (40 keV) for 90 s to quantify heavy elements. No vacuum or helium flow was used. Analytical repeatability, accuracy and precision were checked using an in-house obsidian standard.</p> <p>Using the GeoChem internal calibration, 15 elements were quantified: Al, Si, K, Ca, Ti, Cr, Mn, Fe, Ni, Cu, Zn, Rb, Sr, Zr, Pb.</p> <p>The files beamspectra.csv and chemistry.csv are the export files as produced by the instrument.</p> <p>The file erbray.csv contains all chemical compositions (only chemical elements for which measurements are considered reliable are retained), with the following columns:</p> <ul> <li><em>sample</em>: sample reference.</li> <li><em>laboratory</em>: analysis laboratory.</li> <li><em>date</em>: date of the analysis.</li> <li><em>group</em>: technical group.</li> <li><em>material</em>: type of material.</li> <li><em>stratigraphy</em>: stratigraphic unit.</li> <li><em>comments</em>: extra information.</li> <li><em>LOI</em>: loss on ignition (percent).</li> <li><em>Al, Si, K, Ca, Ti, Cr, Fe, Rb, Sr, Zr, Pb</em>: amounts and corresponding uncertainties (ppm).</li> </ul>
An Image-Based Gamut Analysis of Translucent Digital Ceramic Prints for Coloured Photovoltaic Modules: Supplementary Data
<p>Colouring the frontglass of PV modules via digital ceramic printing aids in concealing the PV when integrated into existing building façades as BIPV, while admitting sufficient light to produce electricity. This promotes the visual acceptance and adoption of PV as a source of renewable energy in urban environments. The effective colour of the PV laminate is a combination of the transparent colour on glass and the colour of the PV cells. This colour should ideally match the architect’s visual expectations in terms of fidelity, but also in terms of relative PV efficiency as a function of print density. In practice, these requirements are often contradictory, particularly for vivid colours, and the visual results may deviate significantly. This paper presents an objective analysis of how colours appear on PV frontglass laminated with a PV module, using an image-based colour acquisition process. Given a set of 1044 nominal colours uniformly distributed in the RGB colour space, each printed in 10 opacities, we quantify the range of effective colours observed when printed on glass and combined with PV, and their deviation from the nominals. Our results confirm that the effective colour gamuts are significantly constrainted and skewed, depending on the ink volume and glass finish used for printing. In particular, blue-magenta hues cannot be reliably rendered with this process. These insights can serve as guidelines for selecting target colours for BIPV that can be well approximated in practice.</p>
Dataset of the Volkswagen Fond Project no. 90 216 " Early mounted nomads and their vessels Ceramic analysis project aimed at supporting the reconstruction of socio-economic conditions in mobile populations north of the Black Sea between 1100 and 600 BC"
<p>The Excel-Sheet contains information (location of the site, chronological position, type of site, archaeological culture, literature, photographies and drawings, analysis made, results of the analysis, etc.) about the samples taken in the Volkswagen Fond Project no. 90 216 "Early mounted nomads and their vessels Ceramic analysis project aimed at supporting the reconstruction of socio-economic conditions in mobile populations north of the Black Sea between 1100 and 600 BC".</p> <p>The project itself focuses on contacts and interactions between groups with different material culture remains in two vegetation zones to the north of the Black Sea.The investigation takes a complex archaeometric approach to characterise the pottery of communities that lived in the forest steppe zone and steppe zone to the north of the Black Sea between the Dniester and Dnieper rivers between 1100 and 600 BC. By using an multidisciplinary approach to study the material culture of these communities with mobile lifeways, this project will allow the comparison of the natural science and archaeological data for the first time.</p> <p>The Excel-Sheet presents the results of various analyses performed during the project and serves as the database for publications of the project members.</p>
Code for 'Reconstructing settlement histories in the Papua New Guinea Highlands through ceramic analysis and oral traditions'
<p>This dataset contains the data and code for the sherd macro-appearance model, LA-ICPMS and p-XRF analysis. The code is for R. The LA-ICPMS samples were separated using LAtools. The pXRF data was first processed with ARTAX. The ARTAX result files are provided. The XRFn.txt derives from further processing of the data in Excel. </p>
Beyond the surface: Untangling molecular complexity in organic residue analysis of coated archaeological ceramics
Open the record for dataset details and reuse information.
A multi-method (FTIR, XRD, PXRF) analysis of Ertebølle pottery ceramics from Scania, southern Sweden
<p>Geochemical analysis data of Late Mesolithic (Ertebølle) pottery ceramics from Scania, southern Sweden</p>
Comparative Aesthetic Analysis Between Titanium and Ceramic Implants
ClinicalTrials.gov study NCT04707677. IPD Sharing: NO. Countries: 1. Publications: 0.
EDS and XRD analysis of medieval ceramics from Beaupréau-en-Mauges (France)
<p>This dataset contains analyses of 76 ceramic samples from the medieval workshop of Les Landes (Beaupréau-en-Mauges, Maine-et-Loire, France). The chemical composition of the samples was obtained by energy-dispersive X-ray fluorescence spectrometry (EDS). The mineralogical composition of the samples was studied by powder X-ray diffraction (XRD).</p> <p><strong>Method</strong></p> <p>The outer surfaces of all the samples were mechanically removed prior to analysis.</p> <p><em><strong>EDS</strong></em></p> <p>The samples were heated to 950°C for one hour after 24h drying at 50°C, weighted for LOI calculation and ground in a tungsten carbide mortar. Measurements were made on pelletized powders.</p> <p>The data were collected by energy dispersive X-ray fluorescence spectrometry (Oxford INCA 300 spectrometer) coupled with scanning electron microscopy imaging (JEOL JSM 6460LV variable pressure microscope). The measurements were carried out under partial vacuum (20 Pa) with an acceleration voltage of 20 kV. The acquisition time is 90 s per spectrum, over the energy range 0-20 keV. For all EDS spectra, the dead time during acquisition is about 30%, for an average number of hits per spectrum greater than 10<sup>6</sup>. The compositions are calculated from Oxford Instruments standards made of metals, synthetic compounds and natural minerals.</p> <p>Six measurements were carried out on each pellet (the area analyzed during each measurement is approximately 5.10<sup>-2</sup> mm<sup>2</sup>). The results are expressed in mass percentages of oxides and are normalized to 100%. Ten major elements were quantified: Na<sub>2</sub>O, MgO, Al<sub>2</sub>O<sub>3</sub>, SiO<sub>2</sub>, P<sub>2</sub>O<sub>5</sub>, K<sub>2</sub>O, CaO, TiO<sub>2</sub>, MnO, Fe<sub>2</sub>O<sub>3</sub> (total iron). Although results of elementary composition below 0.5 wt% lack quantitative precision, they are mentioned in the general composition as they hold qualitative information. Values below 0.01% must be considered unreliable.</p> <p>The EDS.csv file contains all the chemical compositions, with the following columns:</p> <ul> <li><em>sample</em>: sample reference.</li> <li><em>analysis</em>: analysis reference (1 to 6 per sample).</li> <li><em>date</em>: date of the analysis.</li> <li><em>laboratory</em>: analysis laboratory.</li> <li><em>fait, stratigraphy, isolat</em>: stratigraphic unit.</li> <li><em>artefact</em>: typology.</li> <li><em>LOI</em>: loss on ignition (percent).</li> <li><em>Na<sub>2</sub>O, MgO, Al<sub>2</sub>O<sub>3</sub>, SiO<sub>2</sub>, P<sub>2</sub>O<sub>5</sub>, K<sub>2</sub>O, CaO, TiO<sub>2</sub>, MnO, Fe<sub>2</sub>O<sub>3</sub> (total)</em>: oxide mass percents.</li> </ul> <p><em><strong>XRD</strong></em></p> <p>The data were collected with a D8 Advance (Bruker) diffractometer in Bragg-Brentano configuration working at 1.6 kW (40 kV, 40 mA) and equipped with a copper anode source (k<sub>α1</sub> = 1.5406 ; the k<sub>β</sub> ray being removed by a Ni-filter in the diffracted beam). The tube was equipped with a 0.3° divergence slit and an 8 mm anti-scattering slit was mounted in front of the LynxEye© CCD detector.</p> <p>Data recording was performed from 3° to 70° (2θ), in steps of 0.02° with an acquisition time of 2 s, the sample being rotated. The stability of the device was controlled between the different series of measurements by the analysis of a standard (corundum crystal, NIST 1976).</p> <p>The XRD.zip archive contains all diffractograms in the Bruker raw format. The XRD.csv file contains all results expressed in counts, one sample per row, the first line gives the angular position (2 thêta) and the first columns contains the sample code.</p>
Comparative analysis of mechanical properties of alumina and in-office 3D-printed zirconia ceramic brackets
<p>Dataset for all analyses</p>
Analysis of Enamel Wear Against Ceramic Restorations
ClinicalTrials.gov study NCT00223405. IPD Sharing: Not stated. Countries: 1. Publications: 0.
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