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Rare Metals 2024年第8期43卷 3961-3973页

作者： Jia-Liang An Ming-Yong Wang Yong-Zheng Jia Jin-Tao Zhang Bao-Yan Feng shu-qiang jiao State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China College of Material Science and Engineering Hebei Province Laboratory of Inorganic Nonmetallic MaterialsNorth China University of Science and TechnologyTangshan 063210China

A promising method for the preparation of pure metallic vanadium via V_(2)CO anode electrolysis was proposed and *** simple and controllable synthesis of a molten chloride salt containing VCl_(2) by an insitu reaction between VCl_(3) and metallic vanadium was verified through thermodynamic analysis and ***-KCl-VCl_(2) molten salt exhibited excellent recycling performance and could be repetitively used to prepare metallic vanadium by V_(2)CO *** V^(2+) ions remained in the molten salt after *** electrolysis conditions,such as the cathode diameter,current density,V^(2+) ion concentration,and temperature,were optimised to maximise the current *** was also simulated to reveal the regulatory *** highest current efficiency was 85%.The purity of metallic vanadium was up to 99.8%.In this study,an easy and efficient preparation of pure metallic vanadium was achieved.

关键词： V_(2)CO Metallic vanadium Current efficiency Molten salt electrolysis

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A review on liquid metals as cathodes for molten salt/oxide electrolysis

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International Journal of Minerals,Metallurgy and Materials 2020年第12期27卷 1588-1598页

作者： shu-qiang jiao Han-dong jiao Wei-li Song Ming-yong Wang Ji-guo TU State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China

Compared with solid metals,liquid metals are considered more promising cathodes for molten slat/oxide electrolysis due to their fascinating advantages,which include strong depolarization effect,strong alloying effect,excellent selective separation,and low operating *** this review,we briefly introduce the properties of the liquid metal cathodes and their selection rules,and then summarize development in liquid metal cathodes for molten salt electrolysis,specifically the extraction of Ti and separation of actinides and rare-earth metals in halide *** also review recent attractive progress in the preparation of liquid Ti alloys via molten oxide electrolysis by using liquid metal *** related to high-quality alloy production and large-scale applications are cited,and several research directions to further improve the quality of alloys are also discussed to realize the industrial applications of liquid metal cathodes.

关键词： liquid metal cathodes molten salts molten oxides electrolysis

Editorial for special issue on high-temperature molten salt chemistry and technology

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International Journal of Minerals,Metallurgy and Materials 2020年第12期27卷 1569-1571页

作者： shu-qiang jiao Ming-yong Wang Wei-li Song State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China

High-temperature molten salt consisting of metal cation and non-metal anion is a promising media to break the limits of aqueous solution due to high conductivity,wide electrochemical window,rapid mass transfer,high solubility to reactants,low vapor pressure,*** the past two hundred years,high-temperature molten salt chemistry and technology attract widely ***,molten salt electrolysis as an indispensable metallurgy technology has been applied industrially for metal extraction of Al,rare earth,and alkali/alkaline-earth *** is well known that industrial aluminum electrolysis was invented by Hall and Heroult in the end of the 19 th *** is a milestone and promotes the change of Al from noble metal to bulk *** present,the yield of Al has reached to 62 millions tons all over the world in ***-temperature molten salt chemistry and technology has brought a revolutionary advancement to human life and infrastructure construction.

关键词： chemistry earth molten

Direct electrochemical N-doping to carbon paper in molten LiCl-KCl-Li3N

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International Journal of Minerals,Metallurgy and Materials 2020年第12期27卷 1687-1694页

作者： Dong-hua Tian Zhen-chao Han Ming-yong Wang shu-qiang jiao State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

Graphite materials are widely used as electrode materials for electrochemical energy storage.N-doping is an effective method for enhancing the electrochemical properties of graphite.A novel one-step N-doping method for complete and compact carbon paper was proposed for molten salt electrolysis in the Li Cl-KCl-Li3 N *** results show that the degree of graphitization of carbon paper can be improved by the electrolysis of molten salts,especially at 2.0 *** gas was produced at the anode and nitrogen atoms can substitute carbon atoms of carbon paper at different sites to create nitrogen doping during the electrolysis *** doping content of N in carbon paper is up to 13.0 wt%.There were three groups of nitrogen atoms,*** N(N-Q),pyrrolic N(N-5),and pyridinic N(N-6)in N-doping carbon paper.N-doping carbon paper as an Al-ion battery cathode shows strong charge-recharge properties.

关键词： N-doping carbon paper molten salt electrolysis electrochemical process

Reduction of residual stress in porous Ti6Al4V by in situ double scanning during laser additive manufacturing

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International Journal of Minerals,Metallurgy and Materials 2021年第11期28卷 1844-1853页

作者： Yi-wa Luo Ming-yong Wang Ji-guo Tu Yu Jiang shu-qiang jiao State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Department of Orthopedics Peking University Third HospitalBeijing 100191China

Selective laser melting(SLM)technology plays an important role in the preparation of porous titanium(Ti)implants with complex structures and precise ***,the processing characteristics of this technology,which include rapid melting and solidification,lead to products with high residual ***,an in situ method was developed to restrain the residual stress and improve the mechanical strength of porous Ti alloys during laser additive *** brief,porous Ti6Al4V was prepared by an SLM three-dimensional(3D)printer equipped with a double laser system that could rescan each layer immediately after solidification of the molten powder,thus reducing the temperature gradient and avoiding rapid melting and *** indicated that double scanning can provide stronger bonding conditions for the honeycomb structure and improve the yield strength and elastic modulus of the *** with an energy density of 75%resulted in 33.5%–38.0%reductions in residual *** porosities of double-scanned specimens were 2%–4%lower than those of singlescanned specimens,and the differences noted increased with increasing sheet *** rescanning laser power should be reduced during the preparation of porous Ti with thick cell walls to ensure dimensional accuracy.

关键词： porous titanium selective laser melting additive manufacturing residual stress mechanical properties

Effect of NaCl on synthesis of ZrB2 by a borothermal reduction reaction of ZrO2

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International Journal of Minerals,Metallurgy and Materials 2019年第7期26卷 831-838页

作者： Yu Wang Yue-dong Wu Ke-han Wu shu-qiang jiao Kuo-chih Chou Guo-hua Zhang State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing

ZrB2 powders were synthesized via a borothermal reduction reaction of ZrO2 with the assistance of NaCl under a flowing Ar atmosphere. The optimal temperature and reaction time were 1223 K and 3 h, respectively. Compared with the reactions conducted without the addition of NaCl, those performed with the addition of an appropriate amount of NaCl finished at substantially lower temperatures. However, the addition of too much NaCl suppressed this effect. With the assistance of NaCl, a special morphology of polyhedral ZrB2 particles covered with ZrB2 nanosheets was obtained. Moreover, the experimental results revealed that the special morphology was the result of the combined effects of B2O3 and NaCl. The formation of the special microstructure is explained on the basis of the “dissolution–recrystallization” mechanism.

关键词： zirconium diboride borothermal reduction ultra-high temperature ceramics dissolution-recrystallization mechanism

Equilibrium between titanium ions and high-purity titanium electrorefining in a NaCl-KCl melt

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International Journal of Minerals,Metallurgy and Materials 2014年第7期21卷 660-665页

作者： Jian-xun Song Qiu-yu Wang Guo-jing Hu Xiao-bo Zhu shu-qiang jiao Hong-min Zhu State Key Lab of Advanced Metallurgy University of Science and Technology Beijing

TiClx （x=2.17） was prepared by using titanium sponge to reduce the concentration of TiCl4 in a NaCl-KCl melt under negative pressure. The as-prepared NaCl-KCl-TiClx melt was employed as the electrolyte, and two parallel crude titanium plates and one high-purity titanium plate were used as the anode and cathode, respectively. A series of electrochemical tests were performed to investigate the influence of electrolytic parameters on the current efficiency and quality of cathodic products. The results indicated that the quality of cathodic products was related to the current efficiency, which is significantly dependent on the current density and the initial concentration of titanium ions. The significance of this study is the attainment of high-purity titanium with a low oxygen content of 30× 10^-6.

关键词： titanium electrodeposition ionic equilibrium high purity materials oxygen concentration

Indian monsoon drove the dispersal of the thoracica group of Scytodes spitting spiders

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Zoological Research 2024年第1期45卷 152-159页

作者： Yu-Fa Luo shu-qiang Li School of Life and Environmental Sciences Shaoxing UniversityShaoxingZhejiang 312000China Key Laboratory of Zoological Systematics and Evolution Institute of ZoologyChinese Academy of SciencesBeijing 100101China Southeast Asia Biodiversity Research Institute Chinese Academy of SciencesYezinNay Pyi Taw 05282Myanmar

We examined the global biogeography of the Scytodes thoracica group of spitting spiders based on 23 years of sampling at the species level(61 species in the thoracica group and 84 species of Scytodes)using DNA data from six *** results indicated that the thoracica group initially dispersed from Southeast Asia to East Africa between 46.5 and 33.0 million years ago,and dispersal events intensified between Southeast/South Asia and East/South Africa from the early to late *** timing of these events indicates that Asian-African faunal exchange of the thoracica group was driven by the Indian monsoon,and the pattern of dispersal suggests that colonialization took root when the Indian monsoon shifted from a North-South direction to an East-West direction from the middle Eocene.

关键词： Geological event Climate change Ballooning organism Faunal exchange Species distribution

A Semiparametric Additive-multiplicative Rates Model for the Weighted Composite Endpoint of Recurrent and Terminal Events

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Acta Mathematica Sinica,English Series 2024年第4期40卷 985-999页

作者： Yi DENG qiang XIONG shu Wei LI School of Economics and Statistics Guangzhou UniversityGuangzhou 510006P.R.China

Recurrent event data are commonly encountered in many scientific fields,including biomedical studies,clinical trials and epidemiological surveys,and many statistical methods have been proposed for their *** this paper,we consider to use a weighted composite endpoint of recurrent and terminal events,which is weighted by the severity of each event,to assess the overall effects of covariates on the two types of events.A flexible additive-multiplicative model incorporating both multiplicative and additive effects on the rate function is proposed to analyze such weighted composite event process,and more importantly,the dependence structure among the recurrent and terminal events is left *** the estimation,we construct the unbiased estimating equations by virtue of the inverse probability weighting technique,and the resulting estimators are shown to be consistent and asymptotically normal under some mild regularity *** evaluate the finite-sample performance of the proposed method via simulation studies and apply the proposed method to a set of real data arising from a bladder cancer study.

关键词： Additive-multiplicative rates model estimating equation recurrent events terminal event weighted composite endpoint

Validation and performance of three scoring systems for predicting primary non-function and early allograft failure after liver transplantation

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Hepatobiliary & Pancreatic Diseases International 2024年第5期23卷 463-471页

作者： Yu Nie Jin-Bo Huang shu-jiao He Hua-Di Chen Jun-Jun Jia Jing-Jing Li Xiao-shun He qiang Zhao General Surgery Center Department of Hepatobiliary Surgery IIResearch Center for Artificial Organ and Tissue EngineeringGuangzhou Clinical Research and Transformation Center for Artificial LiverInstitute of Regenerative MedicineZhujiang HospitalSouthern Medical UniversityGuangzhou 510515China Organ Transplant Center the First Affiliated HospitalSun Yat-sen UniversityGuangzhou 510080China Guangdong Provincial Key Laboratory of Organ Donation and Transplant Immunology Guangzhou 510080China Guangdong Provincial International Cooperation Base of Science and Technology Guangzhou 510080China Division of Hepatobiliary Pancreatic Surgery the First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China

Background: Primary non-function(PNF) and early allograft failure(EAF) after liver transplantation(LT) seriously affect patient outcomes. In clinical practice, effective prognostic tools for early identifying recipients at high risk of PNF and EAF were urgently needed. Recently, the Model for Early Allograft Function(MEAF), PNF score by King's College(King-PNF) and Balance-and-Risk-Lactate(BAR-Lac) score were developed to assess the risks of PNF and EAF. This study aimed to externally validate and compare the prognostic performance of these three scores for predicting PNF and EAF. Methods: A retrospective study included 720 patients with primary LT between January 2015 and December 2020. MEAF, King-PNF and BAR-Lac scores were compared using receiver operating characteristic(ROC) and the net reclassification improvement(NRI) and integrated discrimination improvement(IDI) analyses. Results: Of all 720 patients, 28(3.9%) developed PNF and 67(9.3%) developed EAF in 3 months. The overall early allograft dysfunction(EAD) rate was 39.0%. The 3-month patient mortality was 8.6% while 1-year graft-failure-free survival was 89.2%. The median MEAF, King-PNF and BAR-Lac scores were 5.0(3.5–6.3),-2.1(-2.6 to-1.2), and 5.0(2.0–11.0), respectively. For predicting PNF, MEAF and King-PNF scores had excellent area under curves(AUCs) of 0.872 and 0.891, superior to BAR-Lac(AUC = 0.830). The NRI and IDI analyses confirmed that King-PNF score had the best performance in predicting PNF while MEAF served as a better predictor of EAD. The EAF risk curve and 1-year graft-failure-free survival curve showed that King-PNF was superior to MEAF and BAR-Lac scores for stratifying the risk of EAF. Conclusions: MEAF, King-PNF and BAR-Lac were validated as practical and effective risk assessment tools of PNF. King-PNF score outperformed MEAF and BAR-Lac in predicting PNF and EAF within 6 months. BAR-Lac score had a huge advantage in the prediction for PNF without post-transplant variables. Proper use

关键词： Primary non-function Early allograft failure Risk predicting model Liver transplantation