Preparation and performance of Ce-doped far-infrared radiation ceramics by single iron ore tailings

Zhang, Yu; Lijuan, Wang; Duan, Yudi; Liu, Boran; Liang, Jinsheng

doi:10.1016/j.ceramint.2022.01.029

Cited by 14 publications

(4 citation statements)

References 42 publications

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“…The variations in the B-Binter and B-Bintra distance spacings significantly impact on the optical properties, resulting in enhanced infrared emissivity. The optical properties of high-entropy REB6 are excellent and this improvement may be attributed to changes in the lattice distortion [36,44] and the free electron concentration. However, the boron sublattice in hexaborides is charge deficient and the number of deficient electrons has been experimentally and theoretically determined to be 2 [45].…”

Section: Phase Composition and Microstructurementioning

confidence: 99%

“…The variation in the B-B bond lengths is shown in Table 1. It has been reported that there is a relationship between the infrared emission properties of a material and its lattice strain; thus, to quantify the extent of the lattice distortion [44], the lattice strain of the samples was calculated using the Williamson-Hall formula (Equation ( 12)) [55]…”

Section: Lattice Distortion Analysismentioning

confidence: 99%

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Medium- and High-Entropy Rare Earth Hexaborides with Enhanced Solar Energy Absorption and Infrared Emissivity

Wang,

Pan,

Zhang

et al. 2024

Materials

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The development of a new generation of solid particle solar receivers (SPSRs) with high solar absorptivity (0.28–2.5 μm) and high infrared emissivity (1–22 μm) is crucial and has attracted much attention for the attainment of the goals of “peak carbon” and “carbon neutrality”. To achieve the modulation of infrared emission and solar absorptivity, two types of medium- and high-entropy rare-earth hexaboride (ME/HEREB6) ceramics, (La0.25Sm0.25Ce0.25Eu0.25)B6 (MEREB6) and (La0.2Sm0.2Ce0.2Eu0.2Ba0.2)B6 (HEREB6), with severe lattice distortions were synthesized using a high-temperature solid-phase method. Compared to single-phase lanthanum hexaboride (LaB6), HEREB6 ceramics show an increase in solar absorptivity from 54.06% to 87.75% in the range of 0.28–2.5 μm and an increase in infrared emissivity from 76.19% to 89.96% in the 1–22 μm wavelength range. On the one hand, decreasing the free electron concentration and the plasma frequency reduces the reflection and ultimately increases the solar absorptivity. On the other hand, the lattice distortion induces changes in the B–B bond length, leading to significant changes in the Raman scattering spectrum, which affects the damping constant and ultimately increases the infrared emissivity. In conclusion, the multicomponent design can effectively improve the solar energy absorption and heat transfer capacity of ME/HEREB6, thus providing a new avenue for the development of solid particles.

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Section: Phase Composition and Microstructurementioning

confidence: 99%

Section: Lattice Distortion Analysismentioning

confidence: 99%

Medium- and High-Entropy Rare Earth Hexaborides with Enhanced Solar Energy Absorption and Infrared Emissivity

Wang,

Pan,

Zhang

et al. 2024

Materials

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“…La 2 Sn 2 O 7 [17] possesses a wide band gap (E g = 3.2 eV) and will maintain high NIR solar reflectivity based on band structure and electron transition theory [18]. RE 2 Sn 2 O 7 exhibits 26 different phonon modes [14,19], including RE/Sn-O stretching and bending vibrations with notably high intensities. In addition, RE 2 Sn 2 O 7 presents high asymmetry due to the presence of an oxygen vacancy.…”

Section: Introductionmentioning

confidence: 99%

High-entropy rare earth stannate ceramics: Acid corrosion resistant radiative cooling materials with high atmospheric transparency window emissivity and high near-infrared solar reflectivity

Chen,

He,

Pan

et al. 2024

Journal of Advanced Ceramics

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In response to the development of the concepts of "carbon neutrality" and "carbon peak", it is critical to developing materials with high near-infrared (NIR) solar reflectivity and high emissivity in the atmospheric transparency window (ATW; 8-13 μm) to advance zero energy consumption radiative cooling technology. To regulate emission and reflection properties, a series of high-entropy rare earth stannate ceramics (HE-RE 2 Sn 2 O 7 : (Y 0.2 La 0.2 Nd 0.2 Eu 0.2 Gd 0.2 ) 2 Sn 2 O 7 , (Y 0.2 La 0.2 Sm 0.2 Eu 0.2 Lu 0.2 ) 2 Sn 2 O 7 , and (Y 0.2 La 0.2 Gd 0.2 Yb 0.2 Lu 0.2 ) 2 Sn 2 O 7 ) with severe lattice distortion were prepared using a solid phase reaction followed by a pressureless sintering method for the first time. Lattice distortion is accomplished by introducing rare earth elements with different cation radii and mass. The as-synthesized HE-RE 2 Sn 2 O 7 ceramics possess high ATW emissivity (91.38%-95.41%), high NIR solar reflectivity (92.74%-97.62%), low thermal conductivity (1.080-1.619 W•m −1 •K −1 ), and excellent chemical stability. On the one hand, the lattice distortion intensifies the asymmetry of the structural unit to cause a notable alteration in the electric dipole moment, ultimately enlarging the ATW emissivity. On the other hand, by selecting difficult excitation elements, HE-RE 2 Sn 2 O 7 , which has a wide band gap (E g ), exhibits high NIR solar reflectivity. Hence, the multi-component design can effectively enhance radiative cooling ability of HE-RE 2 Sn 2 O 7 and provide a novel strategy for developing radiative cooling materials.Keywords: radiative cooling materials; high-entropy ceramics (HECs); rare earth stannate (RE 2 Sn 2 O 7 ); high atmospheric transparency window emissivity; high near-infrared (NIR) solar reflectivity

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“…In this case, largescale harmless utilization of IOTs has attracted much attention. Currently, IOTs are mainly used for IOTs recleaning (Wang et al, 2018;Zhai et al, 2020) and mine filling (Onitiri and Akinlabi, 2017;Qiu et al, 2017;Coura et al, 2021), or used as the building material (Menders et al, 2019;Li et al, 2020;Zhang et al, 2022) and soil conditioner (Santana et al, 2020;Castro e Silva et al, 2021;Cui et al, 2021). IOTs are rich in SiO 2 and Al 2 O 3 whose chemical composition is similar to that of cement (Han et al, 2017) and the physical properties are similar to those of natural sands (Huang et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Basic characteristics and environmental impact of iron ore tailings

Wang

Jing

et al. 2023

Front. Earth Sci.

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Introduction: In our study, various test methods were adopted to explore the mineralogical characteristics, grindability, particle morphology, particle size distribution, and environmental leaching toxicity of iron ore tailings (lOTs).Methods: The methods include petrographic analysis, X-ray diffraction (XRD), scanning electronic microscopy (SEM), synchronous thermal analyzer (DSC-TGA), electron probe X-ray microanalyser (EPMA), and synthetic precipitation leaching Procedure (SPLP).Results: The results show that the used IOTs contained 14.54% iron which was mainly stored in magnetite and pyrite. The content of iron silicate accounted for 11.82% of the total iron content. Most of it existed in silicate minerals, including grunerite and hornblende. A small amount of iron was contained in biotite, chlorite and augite. Besides, the grindability of lOTs was much better than that of granulated blast furnace slag (GBFS). After grinding for 140 min, the mass fraction of lOTs particles with the particle size less than 5 um was 44.19%. These particles could be used to fill in the voids in the cement-powder-packed structure. lOTs also contained a large number of submicron and nanoscale particles.Discussion: With great strength and environmental friendliness, the composite cementitious material (CCM) prepared from lOTs can be well applied to the building material field and environmental remediation.

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Preparation and performance of Ce-doped far-infrared radiation ceramics by single iron ore tailings

Cited by 14 publications

References 42 publications

Medium- and High-Entropy Rare Earth Hexaborides with Enhanced Solar Energy Absorption and Infrared Emissivity

Medium- and High-Entropy Rare Earth Hexaborides with Enhanced Solar Energy Absorption and Infrared Emissivity

High-entropy rare earth stannate ceramics: Acid corrosion resistant radiative cooling materials with high atmospheric transparency window emissivity and high near-infrared solar reflectivity

Basic characteristics and environmental impact of iron ore tailings

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