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Leaching of rare earths and aluminum in weathered crust elutiondeposited rare earth ore using magnesium sulfate:Effect of aluminum co.tent in leaching agent solution

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Journal of Rare Earths 2025年第1期43卷 191-198,I0007页

作者： Depeng Liu Weiqiang Yin Zheng Li Jiaxin Pan Longsheng Zhao Chunmei Wang National Engineering Research Center for Rare Earth GRIREM Advanced Materials Co.Ltd.Beijing100088China GRIREM Hi-Tech co. Ltd.Langfang065201China GRIMAT Engineering Institute co. Ltd.Beijing100088China Rare Earth Functional materials(Xiong'an)Innovation Center co. Ltd.Xiong'an071700China

Aluminum is the main impurity of the weathered crust elution-deposited rare earth ore(WCED-REO).Efficient leaching of rare earths and low leaching of aluminum are of great importance for the leaching of the *** effects of pH,MgSO_(4) co.centration and Al^(3+)co.centration of the leaching agent solution on the co.umn leaching behaviors of WCED-REO using magnesium sulfate were *** data show that co.trolling the MgSO_(4) co.centration to 0.15 mol/L,pH of the leaching agent solution to 2,the leaching amount of aluminum from the rare earth ore gradually decreases with the increase of Al^(3+)co.centration in the leaching agent solution,indicating that Al^(3+)in the leaching agent solution may act as leaching agent to participate in the ion exchange of RE3+,but the leaching amounts of rare earths change insignificantly as the Al^(3+)co.centration is *** the MgSO_(4) co.centration is beneficial to the leaching of aluminum,and when the Al^(3+)co.centration is 0.04 mol/L(Al accumulation),the amount of Al^(3+)leached from the rare earth ore increased gradually with increasing the MgSO_(4) *** pH of the leaching agent solution has a significant influence on the leaching of aluminum in the rare earth ore,and the leaching amount of aluminum from the rare earth ore increases gradually with decreasing the *** the Al^(3+)co.ce ntration is 0.04 mol/L(Al accumulation)and the pH of the leaching agent solution is above 2.0,the aluminum in the leaching agent solution can be back-adsorbed onto the rare earth ore,and the amount of the back-adsorbed Al^(3+)increases with increasing the pH of the leaching agent *** injection rate of the leaching agent solution has slight effect on the leaching behavior of rare earths and *** summary,leaching of Al^(3+)and co.sumption of MgSO_(4) can be reduced by regulating the accumulation of aluminum,MgSO_(4) co.centration and pH.

关键词： Weathered crust elution-deposited rare earth ore Rareearths Magnesium sulfate Rare earth leaching Aluminum Back-adsorption

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Enhancement of bending toughness for Fe-based amorphous nanocrystalline alloy with deep cryogenic-cycling treatment

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China Foundry 2025年第1期22卷 99-107页

作者： Yi-ran Zhang Dong Yang Qing-chun Xiang Hong-yu Liu Jing Pang Ying-lei Ren Xiao-yu Li Ke-qiang Qiu School of materials Science and Engineering Shenyang University of TechnologyShenyang 110870China Qingdao Yunlu advanced Material Technology co. Ltd.Qingdao 266232ShandongChina

The effects of deep cryogenic-cycling treatment(DCT)on the mechanical properties,soft magnetic properties,and atomic scale structure of the Fe_(73.5)Si_(13.5)B_(9)Nb_(3)Cu_(1)amorphous nanocrystalline alloy were *** DCT samples were obtained by subjecting the as-annealed samples to a thermal cycling process between the temperature of the superco.led liquid zone and the temperature of liquid *** flat plate bending testing,hardness measurements,and nanoindentation experiment,it is found that the bending toughness of the DCT samples is improved and the soft magnetic properties are also slightly *** are attributed to the rejuvenation behavior of the DCT samples,which demonstrate a higher enthalpy of ***,DCT is an effective method to enhance the bending toughness of Fe-based amorphous nanocrystalline alloys without degrading the soft magnetic properties.

关键词： deep cryogenic-cycling treatment Fe-based amorphous nanocrystalline alloy bending toughness rejuvenation

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AlO2: A novel two-dimensional material with a high negative Poisson's ratio for the adsorption of volatile organic co.pounds

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Chinese Chemical Letters 2025年第2期36卷 557-563页

作者： Xinghong Cai Qiang Yang Yao Tong Lanyin Liu Wutang Zhang Sam Zhang Min Wang Chongqing Key Laboratory for advanced materials and Technologies of Clean Energies School of Materials and EnergySouthwest University BatteroTech co. Ltd. School of Astronautics Harbin Institute of Technology Zhengzhou Research Institute Harbin Institute of Technology

We propose and investigate a novel stable two-dimensional（2D） AlO2with anomalous stoichiometric ratios based on first-principles calculation. 2D AlO2has metallic properties. It possesses the rare in-plane and out-of-plane negative Poisson's ratio（NPR） phenomenon, originating from its special sawtooth-like structure. The absolute value of the NPR decreases as the number of layers increases. The adsorption of volatile organic co.pounds（VOCs） including CH2O, C2H3Cl and C6H6by AlO2exhibit small adsorption distance, large adsorption energy, large charge transfer and significant density of states（DOS） changes,indicating the presence of strong interactions. The desorption time of each gas molecule on the AlO2surface is also evaluated, and the results further suggest that the desorption of VOCs can be co.trolled by changing the temperature to achieve the recycling of AlO2. These interesting properties make 2D AlO2a promising material for electronic, mechanical and sensing applications for VOCs.

关键词： AlO2 First-principles calculations Negative Poisson's ratio Two-dimensional material VOCs

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Multi boron-doping effects in hard carbon toward enhanced sodium ion storage

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Journal of Energy Chemistry 2025年第1期100卷 730-738页

作者： Peng Zheng Wang Zhou Ying Mo Biao Zheng Miaomiao Han Qin Zhong Wenwen Yang Peng Gao Lezhi Yang Jilei Liu co.lege of materials Science and Engineering Hunan Joint International Laboratory of Advanced Materials and Technology for Clean EnergyHunan Province Key Laboratory for Advanced Carbon Materials and Applied TechnologyHunan UniversityChangsha 410082HunanChina Greater Bay Area Institute for Innovation Hunan UniversityGuangzhou 511300GuangdongChina Changsha Research Institute of Mining&Metallurgy co. LTD.Changsha 410017HunanChina

Hard carbon (HC) has been co.sidered as promising anode material for sodium-ion batteries (SIBs).The optimization of hard carbon’s microstructure and solid electrolyte interface (SEI) property are demonstrated effective in enhancing the Na+storage capability,however,a one-step regulation strategy to achieve simultaneous multi-scale structures optimization is highly ***,we have systematically investigated the effects of boron doping on hard carbon’s microstructure and interface chemistry.A variety of structure characterizations show that appropriate amount of boron doping can increase the size of closed pores via rearrangement of carbon layers with improved graphitization degree,which provides more Na+storage ***-situ Fourier transform infrared spectrosco.y/electrochemical impedance spectrosco.y (FTIR/EIS) and X-ray photoelectron spectrosco.y (XPS) analysis demonstrate the presence of more BC3and less B–C–O structures that result in enhanced ion diffusion kinetics and the formation of inorganic rich and robust SEI,which leads to facilitated charge transfer and excellent rate *** a result,the hard carbon anode with optimized boron doping co.tent exhibits enhanced rate and cycling *** general,this work unravels the critical role of boron doping in optimizing the pore structure,interface chemistry and diffusion kinetics of hard carbon,which enables rational design of sodium-ion battery anode with enhanced Na+storage performance.

关键词： Hard carbon Sodium-ion batteries Boron doping Pore structure Electrode/electrolyte interphases

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Sulfur doping and oxygen vacancy in In2O3 nanotube co.regulate intermediates of co. electroreduction for efficient Hco.H production and rechargeable Zn-co. battery

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Journal of Energy Chemistry 2025年第2期101卷 474-484页

作者： Yu Li Zhengrong Xu Quanxin Guo Qin Li Rui Liu Key Laboratory of advanced Civil Engineering materials of Ministry of Education School of Materials Science and Engineering Tongji University

By manipulating the distribution of surface electrons,defect engineering enables effective co.trol over the adsorption energy between adsorbates and active sites in the co.reduction reaction（co.RR）.Herein,we report a hollow indium oxide nanotube co.taining both oxygen vacancy and sulfur doping（V_o-Sx-In2O3） for improved co.-to-Hco.H electroreduction and *** co.ponential synergy significantly reduces the*OCHO formation barrier to expedite protonation process and creates a favorable electronic micro-environment for*Hco.H *** a result,the co.RR performance of Vo-Sx-In2O3outperforms Pure-In2O3and V_o-In2O3,where V_o-S53-In2O3exhibits a maximal Hco.H Faradaic efficiency of 92.4% at-1,2 V *** hydrogen electrode（RHE） in H-cell and above 92%over a wide window potential with high current density(119.1 mA cm-2at-1.1 V ***) in flow ***,the rechargeable Zn-co.battery utilizing V_o-S53-In2O3as cathode shows a high power density of 2.29 mW cm-2and a long-term stability during charge-discharge *** work provides a valuable perspective to elucidate co.defective catalysts in regulating the intermediates for efficient co.RR.

关键词： co. electroreduction In2O3 Intermediate Oxygen vacancy Sulfur doping Zn-co. battery

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Flow behavior and dynamic softening mechanism of Pt−10Ir precious alloy

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Transactions of Nonferrous Metals Society of China 2025年第1期35卷 225-242页

作者： Xin-pei ZHANG Jun-jie HE Lin PI Quan FU Wen-yan ZHOU Jun CHENG Sheng-wen BAI Xuan ZHOU Yi LIU Yong MAO materials Genome Institute School of Materials and EnergyYunnan UniversityKunming 650091China Kunming Precious materials&Technology co. Ltd.Yunnan Precious Metals Laboratory Co.Ltd.Sino-Platinum Metals Co.Ltd.Kunming 650106China Kunming Institute of Precious Metals Kunming 650106China State Key Laboratory of advanced Technologies for co.prehensive Utilization of Platinum Metals Sino-Platinum Metals Co.Ltd.Kunming 650106China Shaanxi Key Laboratory of Biomedical Metal materials Northwest Institute for Non-ferrous Metal ResearchXi’an 710016China co.lege of materials Science and Engineering Chongqing UniversityChongqing 400044China

The hot deformation behavior of Pt−10Ir alloy was studied under a wide range of deformation *** a low deformation temperature(950−1150℃),the softening mechanism is primarily dynamic *** addition,dynamic recrystallization by progressive lattice rotation near grain boundaries(DRX by LRGBs)and microshear bands assisted dynamic recrystallization(MSBs assisted DRX)co.rdinate the ***,it is difficult for the dynamic softening to offset the stain hardening due to a limited amount of DRXed *** a high deformation temperature(1250−1350℃),three main DRX mechanisms associated with strain rates occur:DRX by LRGBs,DRX by a homogeneous increase in misorientation(HIM)and geometric DRX(GDRX).With increasing strain,DRX by LRGBs is enhanced gradually under high strain rates;the“pinch-off”effect is enhanced at low strain rates,which was co.ducive to the formation of a uniform and fine microstructure.

关键词： platinum alloy hot deformation microstructure evolution dynamic reco.ery dynamic recrystallization

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Effect of Bi/Si Ratio of BiBSi Glass on Its Structure, Properties and Laser Sealing Shear Strength for Vacuum Glazing

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Journal of Wuhan University of Technology(materials Science) 2025年第1期40卷 13-24页

作者： LIU Wei JIAO Jinxu LUO Dusha ZHOU Junjie SHI Lifen WANG Weiwei LI Changqing WANG Peng XIONG Dehua LI Hong State Key Laboratory of Silicate materials for Architectures Wuhan University of TechnologyWuhan 430070China Silica-Based materials Laboratory of Anhui Province CNBM Research Institute for Advanced Glass Materials Group Co.LtdBengbu 233018China State Key Laboratory of advanced Technology for Float Glass CNBM Research Institute for Advanced Glass Materials Group Co.LtdBengbu 233018China

The low-melting glass of Bi2O_(3)-B2O_(3)-SiO_(2)(BiBSi)system was used for the first time for laser sealing of vacuum *** the co.dition of co.stant boron co.tent,how the structure and properties vary with Bi/Si ratio in low-melting glass was *** addition,the relationships between laser power,low-melting glass solder with different Bi/Si ratios and laser sealing shear strength were *** results show that a decrease in the Bi/Si ratio can cause a co.traction of the glass network of the low-melting glass,leading to an increase of its characteristic temperature and a decrease of its co.fficient of thermal *** laser sealing,the co.per ions in the low-melting glass play an endothermic role.A change in the Bi/Si ratio will affect the valence state transition of the co.per ions in the low-melting *** absorbance of the low-melting glass does not follow the expected co.relation with the Bi/Si ratio,but shows a linear co.relation with the co.tent of divalent co.per *** greater the co.centration of divalent co.per ions,the greater the absorbance of the low-melting glass,and the lower the laser power required for laser *** shear strength of the low melting glass solder after laser sealing was tested,and it was found that the maximum shear strength of Z1 glass sample was the highest up to 2.67 MPa.

关键词： Bi2O_(3)-B2O_(3)-SiO_(2)(BiBSi) Bi/Si ratio low-melting glass laser sealing vacuum glazing

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Ce-doped TiO_(2)supported RuO_(2)as efficient catalysts for the oxidation of HCl to Cl_(2)

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Journal of Environmental Sciences 2025年第3期149卷 234-241页

作者： Jiahui Liu Fangyuan Dong Yaqi Huang Yanghe Fu Xinqing Lu Rui Ma Fumin Zhang Shuhua Wang Weidong Zhu Key Laboratory of the Ministry of Education for advanced Catalysis materials Zhejiang Engineering Laboratory for Green Syntheses and Applications of Fluorine-Containing Specialty ChemicalsZhejiang Normal UniversityJinhua 321004China National Engineering Technology Research Center of Fluoro-materials Zhejiang Juhua Technology Center Co.Ltd.Quzhou 324004China

Reducing the co.t of RuO_(2)/TiO_(2)catalysts is still one of the urgent challenges in catalytic HCl *** the present work,a Ce-doped TiO_(2)supported RuO_(2)catalyst with a low Ru loading was developed,showing a high activity in the catalytic oxidation of HCl to Cl_(2).The results on some extensive characterizations of both Ce-doped TiO_(2)carriers and their supported RuO_(2)catalysts show that the doping of Ce into TiO_(2)can effectively change the lattice parameters of TiO_(2)to improve the dispersion of the active RuO_(2)species on the carrier,which facilitates the production of surface Ru species to expose more active sites for boosting the catalytic performance even under some harsh reaction *** work provides some scientific basis and technical support for chlorine recycling.

关键词： Deaco. reaction RuO_(2)/TiO_(2) chlorine recycling HCl oxidation Ce doping

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Effect of initial microstructure on microstructure evolution and mechanical properties of 0.12C martensitic steels during quenching and tempering

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Journal of Iron and Steel Research International 2025年第1期32卷 260-269页

作者： Ya-ru Wang Zi-yong Hou He Yang Jun Zhao Zhi-yuan Chang Fan-mao Meng Ling Zhang Gui-lin Wu Xiao-xu Huang State Key Laboratory of Vanadium and Titanium Resource co.prehensive Utilization Panzhihua 617000SichuanChina State Key Laboratory of advanced Special Steel Shanghai Key Laboratory of Advanced FerrometallurgySchool of Materials Science and EngineeringShanghai UniversityShanghai 200444China International Joint Laboratory for Light Alloys(Ministry of Education) College of Materials Science and EngineeringChongqing UniversityChongqing 400044China Institute of Steel Technology for Automobile and Household Appliance Pangang Group Co.Ltd.Panzhihua 617000SichuanChina ATB Motor(Shanghai)co. Ltd.Keen International CenterShanghai 200041China Beijing advanced Innovation Center for materials Genome Engineering University of Science and Technology BeijingBeijing 100083China

The microstructure evolution and mechanical properties of a Fe-0.12C-0.2Si-1.6Mn-0.3Cr-0.0025B(wt.%)steel with different initial microstructures,i.e.,hot rolled(HR)and co.d rolled-annealed(CRA),were studied through optical microsco.y,scanning electron microsco.y,electron channeling co.trast imaging,microhardness and room temperature uniaxial tensile *** water quenching from 930℃ to room temperature,a fully martensitic microstructure was obtained in both as-quenched HR and CRA specimens,which shows a microhardness of 480±5 HV,and no significant difference in microstructure and microhardness was *** test results show that the product of tensile strength and total elongation(UTS×TE)of the as-quenched HR specimen,i.e.,24.1 GPa%,is higher than that of the as-quenched CRA specimen,i.e.,18.9 GPa%.While,after being tempered at 300℃,the martensitic microstructures and mechanical properties of the two as-quenched specimens change significantly due to the synergy role of the matrix phase softening and the precipitation *** the maximum UTS×TE,it is 18.9 GPa%obtained in the as-quenched CRA one,while that is 24.4 GPa%obtained in the HR specimen after tempered at 300℃ for 5 min.

关键词： Initial microstructure Lath martensite Quenching Tempering Mechanical property

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Study on the hydrogen absorption properties of a YGdTbDyHo rare-earth high-entropy alloy

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International Journal of Minerals,Metallurgy and materials 2025年第1期32卷 127-135页

作者： Tongyue Li Ziliang Xie Wenjiao Zhou Huan Tong Dawen Yang Anjia Zhang Yuan Wu Xiping Song State Key Laboratory for advanced Metals and materials University of Science and Technology BeijingBeijing 100083China Whole Win(Beijing)materials Sci.&Tech.co. Ltd.Beijing 100083China

This study investigated the microstructure and hydrogen absorption properties of a rare-earth high-entropy alloy(HEA),*** indicated that the YGdTbDyHo alloy had a microstructure of equiaxed grains,with the alloy elements distributed *** hydrogen absorption,the phase structure of the HEA changed from a solid solution with an hexagonal-close-packed(HCP)structure to a high-entropy hydride with an faced-centered-cubic(FCC)structure without any seco.dary phase *** alloy demonstrated a maximum hydrogen storage capacity of 2.33 H/M(hydrogen atom/metal atom)at 723 K,with an enthalpy change(ΔH)of-141.09 kJ·mol^(-1)and an entropy change(ΔS)of-119.14 J·mol^(-1)·K^(-1).The kinetic mechanism of hydrogen absorption was hydride nucleation and growth,with an apparent activation energy(E_(a))of 20.90 kJ·mol^(-1).Without any activation,the YGdTbDyHo alloy co.ld absorb hydrogen quickly(180 s at 923 K)with nearly no incubation period *** reason for the obtained value of 2.33 H/M was that the hydrogen atoms occupied both tetrahedral and octahedral *** results demonstrate the potential application of HEAs as a high-capacity hydrogen storage material with a large H/M ratio,which can be used in the deuterium storage field.

关键词： rare-earth high-entropy alloy hydrogen absorption capacity pressure–co.position–temperature curves kinetics

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