A new sample preparation method for WD-XRF analysis of sulfide ores by fusion techniques: a BN crucible for protection against contamination and quantitative retention of sulfur

Liu, Yanhong; Xue, Dingshuai; Wang, Hongyue

doi:10.1039/c5ay02797g

Cited by 11 publications

(2 citation statements)

References 22 publications

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“…Granular Ba (Aladdin, 99.9%) was melted into blocks in an electric arc furnace (Edmund Bühler MAM-1), and the surface oxide was removed for purification. Cu (99.9999%), Sc (99.99%), Te (99.999%), Gd (99.99%), and the as-obtained Ba blocks were placed into a BN crucible according to the stoichiometric ratio, since the BN crucible is a kind of common reaction vessel inert to react with our raw materials. , All the operations were carried out in the glovebox filled with high-purity Ar (Mbraun-UNIlab Pro, H 2 O < 0.3 ppm, O 2 < 0.3 ppm). The crucible was then placed in a sealed quartz tube, which was transferred into a muffle furnace (KSL-1200X Hefei Kejing Material Technology Co., Ltd.).…”

Section: Methodsmentioning

confidence: 99%

The Substitution of Rare-Earth Gd in BaScCuTe₃ Realizing the Band Degeneracy and the Point-Defect Scattering toward Enhanced Thermoelectric Performance

Yu,

Wang,

Cai

et al. 2024

Inorg. Chem.

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Zintl compounds have continuously received significant attention, primarily due to their structural characteristics that align with the properties of the electron crystal and phonon glass. In this study, the crystal structure and thermoelectric properties of the quaternary Zintl chalcogenide BaScCuTe 3 are investigated. The band structure calculations for BaScCuTe 3 reveal a slight energy split of 0.08 eV between the second valence band and the valence band maximum, suggesting the presence of multiband-transport behaviors. Substitution of rare earth Gd for Sc is conducted, which significantly increases the hole concentration from 4.1 × 10 19 cm −3 to 8.2 × 10 19 cm −3 at room temperature. Meanwhile, the Seebeck coefficient increases because of the participation of the second valence band. A maximum power factor of 6.56 μW/cm•K 2 at 773 K is obtained, which is 72% higher than that of the pristine sample. Moreover, the lattice thermal conductivity decreases from 0.57 W/m•K for BaScCuTe 3 to 0.48 W/m•K for BaSc 0.97 Gd 0.03 CuTe 3 at 773 K, owing to the introduction of point-defect scattering. As a result, there is a noteworthy improvement in the thermoelectric figure of merit zT, increasing from 0.44 for the undoped sample to 0.85 for BaSc 0.98 Gd 0.02 CuTe 3 . Considering these findings, BaScCuTe 3 exhibits great potential and holds promise for further investigation in the field of thermoelectric materials.

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Section: Methodsmentioning

confidence: 99%

The Substitution of Rare-Earth Gd in BaScCuTe₃ Realizing the Band Degeneracy and the Point-Defect Scattering toward Enhanced Thermoelectric Performance

Yu,

Wang,

Cai

et al. 2024

Inorg. Chem.

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“…noted the difficulties in the analysis of light elements by wavelength dispersive X‐ray fluorescence (WDXRF) spectrometry using pressed powder and suggested the need to fuse the sample even with the difficulty of treating samples with high contents of sulfides. Liu et al . conducted a study to optimize the oxidation process of sulfide ores for fused beads preparation in Pt crucibles using boron nitride crucibles in the oxidation process.…”

Section: Introductionmentioning

confidence: 99%

Analysis of corrosion residues by WDXRF

et al. 2017

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In this article, a methodology for the wavelength dispersive X-ray fluorescence analysis of corrosion residues is described. Corrosion residues are generally composed of elements that are, total or partially, in a reduced state. Therefore, to prepare fused beads to be measured by wavelength dispersive X-ray fluorescence, it is necessary to oxidize species and to avoid any analyte loss, as sulfur, which is present in residues composition.The combination of an oxidizing agent (LiNO 3 ) and a flux (Li 2 B 4 O 7 + LiBO 2 ), at a mass ratio residue : oxidizing agent : flux of 1:5:12, is demonstrated to be suitable for the quantitative retention of sulfur in the sample preparation. The addition of silica to the mixture (residue : oxidizing agent : flux) for the formation of homogeneous fused beads is also studied. The optimal parameters for the sample preparation are as follows: A temperature of 600°C for 15 min for the oxidation process and a fusion temperature of 950°C for fused beads preparation.The quantitative retention of sulfur in the entire process was validated by an independent method, combustion and infrared detection, and analyzation reference materials. Moreover, minor and major elements (Al,

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Preparation of Sample for X‐Ray Fluorescence Analysis

Aylikçi

Oruc

Bahçeci

et al. 2022

X‐Ray Fluorescence in Biological Sciences

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A new sample preparation method for WD-XRF analysis of sulfide ores by fusion techniques: a BN crucible for protection against contamination and quantitative retention of sulfur

Abstract: In this article, a methodology is described for the wavelength-dispersive X-ray fluorescence analysis of sulfide ores by fusion techniques.

Cited by 11 publications

References 22 publications

The Substitution of Rare-Earth Gd in BaScCuTe₃ Realizing the Band Degeneracy and the Point-Defect Scattering toward Enhanced Thermoelectric Performance

The Substitution of Rare-Earth Gd in BaScCuTe₃ Realizing the Band Degeneracy and the Point-Defect Scattering toward Enhanced Thermoelectric Performance

Analysis of corrosion residues by WDXRF

Preparation of Sample for X‐Ray Fluorescence Analysis

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A new sample preparation method for WD-XRF analysis of sulfide ores by fusion techniques: a BN crucible for protection against contamination and quantitative retention of sulfur

Abstract: In this article, a methodology is described for the wavelength-dispersive X-ray fluorescence analysis of sulfide ores by fusion techniques.

Cited by 11 publications

References 22 publications

The Substitution of Rare-Earth Gd in BaScCuTe3 Realizing the Band Degeneracy and the Point-Defect Scattering toward Enhanced Thermoelectric Performance

The Substitution of Rare-Earth Gd in BaScCuTe3 Realizing the Band Degeneracy and the Point-Defect Scattering toward Enhanced Thermoelectric Performance

Analysis of corrosion residues by WDXRF

Preparation of Sample for X‐Ray Fluorescence Analysis

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Product

Resources

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The Substitution of Rare-Earth Gd in BaScCuTe₃ Realizing the Band Degeneracy and the Point-Defect Scattering toward Enhanced Thermoelectric Performance

The Substitution of Rare-Earth Gd in BaScCuTe₃ Realizing the Band Degeneracy and the Point-Defect Scattering toward Enhanced Thermoelectric Performance