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Proton transport in unsintered BaCe_(0.8)Y_(0.2)O_(3-α) for easily prepared electrochemical devices

Journal of Rare Earths 2025年第1期43卷 133-145,I0006页

作者： Xi Wang Yushi Ding Ying Li Gaopeng Zhou Wenlong Huang Liaoning Key Laboratory for Metallurgical Sensor Material and Technology School of MetallurgyNortheastern UniversityShenyang110819China

BaCe_(0.8)Y_(0.2)O_(3)-αceramics exhibit superior conductivity among related ***,the hightemperature sintering makes it difficult to prepare electrochemical devices with a BaCe_(0.8)Y_(0.2)O_(3)-αmultilayer film,and very few studies have examined the conductivity and transport properties of unsintered BaCe_(0.8)Y_(0.2)O_(3)-α.In nominally dry conditions,the instability of this material in a watercontaining atmosphere can be minimized,allowing the unsintered BaCe_(0.8)Y_(0.2)O_(3)-αto be applied in some particular test environment as a component of electrochemical ***,the conductivity of unsintered BaCe_(0.8)Y_(0.2)O_(3)-αin dry conditions was measured via AC impedance spectroscopy in the temperature range of 500-800℃.The unsintered BaCe_(0.8)Y_(0.2)O_(3)-αexhibits high conductivity and hydration ability,as well as low proton activation *** addition,it shows high oxygen vacancy and low proton transport numbers at high temperature,limited by its grain *** work provides insights into the conductivity and proton transport of unsintered BaCe_(0.8)Y_(0.2)O_(3)-αand demonstrates its potential as a proton-conducting electrolyte.

关键词： Protonic conductor Unsintered material BaCe_(0.8)Y_(0.2)0^(3-α) Conductivity Transport number Rare earths

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High performance Sc2(WO4)3–BaCo0.5Fe0.5O3-δ cathode catalyst for proton-conducting solid oxide fuel cells

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Ceramics International 2025年第13期51卷 17822-17827页

作者： Zheng, Jie Li, Ying Huang, Yongtao Wang, Zezhong Lv, Mingze Zhang, Wei Zhuang, Chunsheng School of Metallurgy Liaoning Key Laboratory for Metallurgical Sensor Materials and Technology Northeastern University Shenyang110819 China Henan Academy of Science Applied Physics Institute Co.Ltd Zhengzhou450001 China

This study, BaCo0.5Fe0.5O3-δ and Sc2(WO4)3 composite cathode materials were prepared, which have low coefficients of thermal expansion. The research assesses their potential application as cathodes in proton-conducting solid oxide fuel cells (H-SOFCs). The introduction of Sc2(WO4)3 was found to enhance electrolyte-cathode connectivity, significantly improving cell performance. The composite material, with a BaCo0.5Fe0.5O3-δ to Sc2(WO4)3 ratio of 8:2, demonstrated increased oxygen vacancies, higher conductivity, improved surface exchange coefficients, and better oxygen adsorption capabilities. SEM analysis revealed effective stress relief at the contact layer and the absence of delamination at the cathode-electrolyte interface. With a maximum power density of 613 mW cm⁻2 achieved at 700 °C, the cell employing this material composition highlights the promising potential of the BaCo0.5Fe0.5O3-δ and Sc2(WO4)3 composite cathode in H-SOFCs. © 2025

关键词： Oxygen vacancies

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Influence of Blast Furnace Burden with Different TiO2 Contents on the Process of Reduction and Slag Formation in Cohesive Zone

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ISIJ International 2025年第4期65卷 521-532页

作者： Sui, Jiaheng Yang, Songtao Wang, Qi Sun, Changyu Zhao, Xining Niu, Dongpo Huang, Jiankang School of Materials and Metallurgy University of Science and Technology Liaoning Liaoning Anshan114051 China Key Laboratory of Liaoning Province for Recycling Science of Metallurgical Resources Northeastern University Shenyang110819 China

Vanadium and titanium magnetite (VTM) possesses considerable value in comprehensive mining and utilization. The varying TiO2 content in the blast furnace burden during smelting directly influences the formation, location, thickness, permeability, and heat exchange within the cohesive zone of the blast furnace. This paper employs the ‘Qisunny method’ to simulate the reduction droplet of blast furnace burden under the condition of different TiO2 content in the theoretical composition of blast furnace hearth slag, and systematically researches the change rule of soft-melting and dripping performance of blast furnace burden. It systematically investigates the factors influencing the soft-melting and dripping performance of the blast furnace burden. The results indicate that, as the TiO2 content in the theoretical composition of blast furnace final slag increases from 7.5 wt% to 25.5 wt%, several changes occur: the softening zone (ΔTs) widens, while the melting zone (ΔTm) narrows. Additionally, the temperature range of the cohesive zone (ΔTc) experiences a slight widening, and the cohesive tends to shift downward. The reduction of iron oxides in the blast furnace burden occurs primarily in the softening zone, whereas the reduction of titanium oxides begins in the melting zone. Furthermore, the simulated operation line gradually deviates from the ideal operation line, necessitating an increase in airflow and coke ratio for optimal performance in the actual operation of the blast furnace. © 2025 The Iron and Steel Institute of Japan.

关键词： Slags

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Proton conducting electrolyte Ba3Ca1.18Nb1.72Y0.1O9-δ for hydrogen separation and fuel cell: Study on phase composition, microstructure, and electrical properties

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Electrochimica Acta 2025年 528卷

作者： Cai, Xinyu Li, Ying Yang, Lixin School of Metallurgy Liaoning Key Laboratory for Metallurgical Sensor Material and Technology Northeastern University Shenyang110819 China

The complex perovskite type proton-conducting materials Ba3Ca1.18Nb1.82O9-δ (BCN18) and Ba3Ca1.18Nb1.72Y0.1O9-δ (BCNY) were fabricated via a solid-state synthesis route. Structural characterization of both compounds was performed through X-ray diffraction analysis (XRD). The microstructure of BCN18 and BCNY were carried out by scanning electron microscopy (SEM). The electrochemical properties were evaluated via alternating current impedance spectroscopy (EIS). The XRD patterns confirmed the successful synthesis of BCN18 and BCNY. Microstructural analysis through SEM revealed compact morphology for both materials. Grain boundary characteristics were examined using distribution of relaxation time (DRT) method, demonstrating that BCNY possesses significantly reduced grain boundary resistance compared to BCN18. The conductivities of BCN18 and BCNY were 2.6 × 10−3 S cm−1 and 4.64 × 10−3 S cm−1 at 800 °C. BCNY demonstrated a marginally elevated proton transference number relative to BCN18 under identical evaluation conditions. In the hydrogen separation measurement, the hydrogen permeation flux of BCNY was higher than that of BCN18. This study provides important references for developing high-performance proton-conducting electrolytes in hydrogen separation and fuel cell applications. © 2025 Elsevier Ltd

关键词： Electrolytes

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Special issue on progress of real-time confocal microscopy study on steelmaking and phase transformation in metallic materials

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Journal of Iron and Steel Research International 2025年第2期32卷 313-314页

作者： Wangzhong Mu Ying Ren Tong-sheng Zhang Deepoo Kumar Susanne Michelic Bryan Webler Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education) Northeastern UniversityShenyang 110819LiaoningChina Department of Materials Science and Engineering KTH Royal Institute of TechnologyStockholm 10044Sweden School of Metallurgical and Ecological Engineering University of Science and Technology Beijing(USTB)Beijing 100083China School of Materials Science and Engineering Shanghai UniversityShanghai 200444China Department of Metallurgical Engineering and Materials Science IIT BombayPowaiMumbaiIndia Christian Doppler Laboratory for Inclusion Metallurgy in Advanced Steelmaking Montanuniversitaet LeobenLeoben 8700Austria Department of Materials Science and Engineering Carnegie Mellon UniversityPittsburgh 15213PAUSA

High-temperature confocal laser scanning microscopy(HT-CLSM)is a robust characterization tool which can provide in situ real-time studies of materials *** facility has been applied in investigating interfacial phenomena in ironmaking and steelmaking as well as phase transformations during heat treatment of metallic *** pioneering work on the application of HTCLSM dates back to twenty-five years ago,to directly observe the crystallization of undercooled steel melt.

关键词： transformation materials steel

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Green synthesis pathway: Transforming industrial waste into high-performance MgAl-LDO adsorbent and the innovative applications in heavy metal ions capture

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Journal of Water Process Engineering 2025年 73卷

作者： Han, Mingyu Shen, Xiaoyi Guo, Jiaqi Liu, Yan Zhai, Yuchun Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education) School of Metallurgy Northeastern University Shenyang 110819 China Liaoning Key Laboratory for Metallurgical Sensor and Technology Northeastern University Shenyang 110819 China

Excessive discharge of heavy metal ions poses significant risks to both aquatic ecosystems and human health. This study proposes a sustainable strategy to synthesize magnesium‑aluminum layered double oxide (MgAl-LDO) from industrial solid waste (aluminum slag and magnesite) via alkali dissolution, hydrothermal treatment (160 °C, 6 h), and calcination (500 °C, 3 h). The waste-derived MgAl-LDO demonstrates exceptional adsorption capacities of 559.06 mg·g⁻¹ for Cu(II) and 1735.87 mg·g⁻¹ for Pb(II), outperforming most reported adsorbents. Adsorption equilibrium is achieved within 120 min for Cu(II) and 210 min for Pb(II), following the pseudo-second-order kinetic model, indicating that chemisorption is dominant. Isotherm analysis aligns with the Redlich-Peterson model (R² > 0.988), revealing monolayer adsorption with multilayer characteristics. Structural characterization (XRD, SEM, XPS) reveals a synergistic mechanism: (1) electrostatic attraction (pH > pH_pzc), (2) surface precipitation (formation of Cu₂Cl(OH)₃) and Pb(OH)Cl), and (3) ion exchange ((Mg²⁺/Al³⁺ replaced by heavy metal ions). The unique “memory effect” of MgAl-LDO promotes structural rehydration, enhancing active site regeneration. This method significantly reduces costs compared to chemical reagent-based synthesis and demonstrates robust stability across pH 4–12, establishing a circular economy paradigm for converting industrial waste into high-performance adsorbents and providing scalable solutions for heavy metal remediation. © 2025 Elsevier Ltd

关键词： Adsorption performance Heavy metal ion Hydrothermal process Layered double hydroxide/oxide

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State-of-art of in situ observations of inclusion agglomeration at steel/Ar and steel/slag interfaces:a review of recent development on experimental and theoretical studies

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Journal of Iron and Steel Research International 2025年第2期32卷 315-333页

作者： Yi Wang Jian-xun Fu Deepoo Kumar Qiang Wang Hong-liang Yang Wang-zhong Mu Center for Advanced Solidification Technology(CAST) School of Materials Science and EngineeringShanghai UniversityShanghai 200444China Department of Materials Science and Engineering KTH Royal Institute of TechnologyStockholm 10044Sweden Engineering Materials Division of Materials ScienceDepartment of Engineering Science and MathematicsLuleåUniversity of TechnologyLuleå 97187Sweden Department of Metallurgical Engineering and Materials Science IIT BombayPowaiMumbaiIndia Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education) Northeastern UniversityShenyang 110819LiaoningChina ABB Metallurgy Västerås 72136Sweden

Cleanliness control of advanced steels is of vital importance for quality control of the *** order to understand and control the inclusion removal during refining process in molten steel,its motion behaviors at the multiple steel/gas/slag interfaces have attracted the attention much of metallurgical *** recent development of the agglomeration of non-metallic inclusions at the steel/Ar and steel/slag interfaces has been summarized,and both the experimental as well as theoretical works have been *** terms of in situ observation of high-temperature interfacial phenomena in the molten steel,researchers utilized high-temperature confocal laser scanning microscopy to observe the movement of more types of inclusions at the interface,i.e.,the investigated inclusion is no longer limited to Al_(2)O_(3)-based inclusions but moves forward to rare earth oxides,MgO-based oxides,*** terms of theoretical models,especially the model of inclusions at the steel/slag interface,the recent development has overcome the limitations of the assumptions of Kralchevsky-Paunov model and verified the possible errors caused by the model assumptions by combining the water model and the physical *** but not least,the future work in this topic has been suggested,which could be in combination of thermal physical properties of steels and slag,as well as utilize the artificial intelligence-based methodology to implement a comprehensive inclusion motion behaviors during a comprehensive metallurgical process.

关键词： Inclusion movement Steel/Ar interface Steel/slag interface In situ observation

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Effect of Annealing Treatment on the Interface Structure and Properties of 1070A/7075 Composite Plate Produced by Liquid-Solid Cast-Rolling

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Metal Science and Heat Treatment 2025年 1-9页

作者： Tian, Shuangyong Sun, Yuchong Xu, Zhen Zang, Ximin Song, Hua Chen, Qingqiang School of Material and Metallurgy University of Science and Technology Liaoning Anshan114051 China Shenyang University of Technology Shenyang110870 China Liaoning Province Key Laboratory of metallurgical equipment and process control Anshan114051 China School of Mechanical and Electrical Engineering Shandong Jianzhu University Jinan250101 China

The effect of annealing temperature and time on the interfacial organization and properties of the liquid-solid cast-rolled 1070A/7075 aluminum alloy composite plates are investigated. Optical and electron microscopy, energy-dispersive x-ray spectroscopy, mechanical shear and tensile tests were used in the study. It is shown that annealing promotes the diffusion of elements between the 1070A/7075 aluminum alloys of the composite, and the interface region of the composite forms an obvious intermediate transition layer. It is found that in order to ensure the bonding strength of the composite plate after annealing, the width of the transition layer should be between 1.5 – 7.9 μm. After annealing at 300°C for 3 h, the element diffusion distance is 30 μm, and the width of the interface transition zone is 2.4 μm. In this case, the bond strength at the interface reaches a maximum value of 105 MPa, and the tensile strength, yield strength and relative elongation are 150 MPa;70 MPa and 27% respectively. © Springer Science+Business Media, LLC, part of Springer Nature 2025.

关键词： Aluminum alloys

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Effect of TiO2 on B2O3-SiO2-Al2O3-Na2O-BaO glass lubricant: Viscosity, structure, melting behavior and wettability

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Ceramics International 2025年

作者： Cui, Lei Ni, Pei-yuan Song, Bing Lv, Wei Li, Ying School of Metallurgy Northeastern University Liaoning Shenyang110819 China Liaoning Key Laboratory of Metallurgical Sensor Materials and Technology School of Metallurgy Northeastern University Shenyang110819 China Pangang Group Research Institute Co. Ltd. Panzhihua617000 China Department of Materials Science & Engineering University of Toronto TorontoONM5S 3E3 Canada

Glass lubricants with suitable viscosity, softening temperature and wettability are critical for the high efficiency production of titanium alloys in hot extrusion process. A novel glass lubricant, (26.29–0.263x)B2O3-(41.19–0.412x)SiO2-(6.13–0.061x)Al2O3-(11.39–0.114x)Na2O-(15–0.15x)BaO-xTiO2, was investigated in this paper. The effect of TiO2 content on its viscosity, structure, melting behavior and wettability was investigated from 900 °C to 1100 °C. The results showed that the viscosity value at 950 °C was decreased by 42.83 % from 48.8 Pa s to 27.9 Pa s, when TiO2 content was increased from 0 wt% to 12 wt%. The glass deformation, softening, hemispheric and flow temperatures were increased with an increased TiO2 content, and the sample T2 (3 wt% TiO2) showed a good wettability with the Ti-6Al-4V alloy matrix. X-ray photoelectron spectroscopy fitting and molecular dynamics simulations due to show that the increased amounts of Q2, Q3, Q4, [BO3], [AlO4], and [TiO4] in the melts with an increased TiO2 content lead to a weakened network homogeneity and symmetry, and consequently a reduced viscosity. Furthermore, lubricant T2 was recommended due to its softening temperature value of 759.1 °C, wetting angle value of 8.1° and viscosity value of 46.6 Pa s at 950 °C, and a small viscosity variation was observed from 950 °C to 1100 °C, which is a typical temperature change in TC4 hot extrusion. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Titanium alloys

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A new insight into VS4@rGO preparation for ion storage: In-situ conversion from vanadium-containing leaching solution of vanadium slag

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Separation and Purification technology 2025年 372卷

作者： Wen, Jing Yu, Tangxia Fu, Dechan Sun, Yue Arken, Shapkat Yang, Guangdong Jiang, Tao School of Metallurgy Northeastern University Liaoning Shenyang110819 China Northeastern University Shenyang110819 China Liaoning Key Laboratory for Metallurgical Sensor and Technology Shenyang110819 China

A shorten and cleaner preparation process for the ideal ion storage material vanadium tetrasulfide and reduced graphene oxide composites (VS4@rGO) was proposed, in which the vanadium-containing leaching solution from an important secondary resource vanadium slag was used as the vanadium resource, rather than the expensive vanadium reagent. Then, the structure and electrochemical performances of VS4@rGO prepared in-situ (VS4@rGOin-situ), along with the recovery ratio of vanadium during preparation was analyzed systematically. Results show that the vanadium-containing leaching solution after calcification roasting and NaHCO3 leaching with vanadium slag was suitable for VS4@rGOin-situ preparation. Compared to the concentration of GO, the vanadium concentration in the leaching solution and the hydrothermal temperature had the greater impacts on the types of vanadium products and the vanadium recovery ratio. As the hydrothermal reaction was carried out at 160 ℃ for 24 h with vanadium and GO concentrations of 5 g/L and 2 mg/mL respectively, VS4@rGOin-situ with vanadium and sulfur in the form of V4+ and S22+ was obtained, in which the regular rod-like structure VS4 was spread on top of the layered structure rGO by V–C bond, and the recovery ratio of vanadium could reach 99.59 %. When VS4@rGOin-situ was used as the anode material for Li-ion and Na-ion batteries, the initial discharge capacity reached 1293.64 mAh·g−1 and 842.61 mAh·g−1 at current density of 0.1C, which were even higher than that of VS4@rGO prepared with the chemical reagents. This process provided a new thought to shorten the preparation process of VS4@rGO, and helped the traditional vanadium extraction industry develop towards the high added value products. © 2025

关键词： Leaching

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