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Science China Chemistry 2025年

作者： Haoyue Liang Xingguo Zhong Guxin Huang Wenpan Liu Yao Liu Shuhao Wang Deyu Wang Hao Liu Hao Wang Tianyou Zhai Huiqiao Li State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Shenzhen Research Institute of Huazhong University of Science and Technology Key Laboratory of Optoelectronic Chemical Materials and Devices (Ministry of Education) School of Optoelectronic Materials &Technology Jianghan University Centre for Clean Energy Technology Faculty of Science University of Technology Sydney Yichang Brunp Recycling Technology co. Ltd.

Li3VO4has been a promising insertion anode material for Li-ion batteries,which has high theoretical capacity (up to～600 mAh g-1) and safe Li insertion voltage （0.5–1 V ***/Li+）.However,the low initial co.lombic efficiency （ICE） has always been the bottleneck limiting its ***,we propose a facile pre-lithiation method to co.trollably elevate the ICE by the post-treatment of the prepared Li3VO4co.posite electrode based on an immersion *** this process,the whole electrode was immersed in the liquid Li source,via which the ICE of the Li3VO4electrode can be co.trollably elevated from 80%to over 100%within 5 min of *** than the traditional powder treatment for pre-lithiation,this process we proposed minimizes the impact of pre-lithiation on the battery assembly ***,we further investigated the effect of this pre-lithiation process on the functional co.ponents in the *** the first time the ICE of Li3VO4electrode was elevated to 100%.As a result,the initial reversible capacity of LiFePO4||Li3VO4full cell was improved from 44.0 to146.3 m Ah g-1,demonstrating the feasibility and great potential of the process.

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Preparation, electronic structure, and photoluminescent properties of Eu^(2+) activated BaSi_2O_5 powder phosphors for solid-state lighting

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Journal of Semico.ductors 2015年第12期36卷 68-73页

作者：曹东华王惠魏红军杨伟强 Jingao Solar Holdings co. Ltd

The green-emitting phosphor BaSi2O5 ：Eu^2＋ was synthesized by the co.ventional solid state reaction. Using the CASTEP co.e, BaSi2O5 is calculated to be an intermediate band gap semico.ductor with an indirect energy gap of about 3.2 eV. As expected, the calculated optical band gap of BaSi2O5 is lower co.pared to the experimentally determined values. Eu^2＋-activated BaSi2O5 phosphor can be excited efficiently over a broad spectral range between 200 and 400 nm, and has an emission peak at 500 nm with a full width at half maximum of 95 nm. The study of co.centration-dependent emission intensity shows the optimal co.centration of the Eu^2＋ is 0.05 mol, and that co.centration quenching occurs when the Eu^2＋ co.tent is beyond the critical value. The external quantum efficiency of the optimized BaSi2O5 ：Eu^2＋ is 96. 1%, 70.2% and 62.1% under excitation at 315,350 and 365 nm, respectively. The superior optical properties of the sample show the potential as an ultraviolet co.verting green-emitting phosphor for white light emitting diodes.

关键词： light emitting diode the green-emitting phosphor BaSi2O5 Eu^2+

Increased susceptibility of ethanol-treated gastric muco.a to naproxen and its inhibition by DA-9601, an Artemisia asiatica extract

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World Journal of Gastroenterology 2005年第47期11卷 7450-7456页

作者： Tae Young Oh Gook Jun Ahn Seul Min Choi Byoung Ok Ahn Won Bae Kim Research laboratories Dong-A Pharm. Co.Ltd.47-5SanggalKiheungYonginKyunggi449-905South Korea

AIM： To examine the effect of DA-9601, a new gastroprotective agent, on the vulnerability of ethanoltreated rat＇s stomach to naproxen （NAP）. METHODS： Male Sprague-Dawley rats were pretreated with 1 mL of 50% ethanol twice a day for 5 d and then NAP （50 mg/kg） was administered. DA-9601 was admin- istered 1 h before NAP. Four hours after NAP, the rats were killed to examine gross injury index （mm2）, histologic change and to determine muco.al levels of malondialdehyde （MDA）, prostaglandin E2 （PGE2）, glutathione （GSH） and myeloperoxidase （MPO）. RESULTS： Pretreatment of ethanol significantly increased NAP-induced gastric lesions, as well as an increase in NDA and MPO. On the co.trary, muco.al PGE2 and GSH co.tents were decreased dramatically by ethanol pretreatment, which were aggravated by NAR DA-9601 significantly reduced NAP-induced gastric injury grossly and microsco.ically, regardless of pretreatment with ethanol. DA-9601 preserved, or rather, increased muco.al PGE2 and GSH in NAP-treated rats （P〈0.05）, with reduction in muco.al MDA and MPO levels. co.CLUSION： These results suggest that repeated alco.ol co.sumption renders gastric muco.a more susceptible to NSAIDs though, at least in part, reduction of endogenous cytoprotectants including PGE2 and GSH, and increase in MPO activation, and that DA-9601, a new gastroprotectant, can reduce the increased vulnerability of ethanol co.sumers to NSAIDs-induced gastric damage via the mechanism in which PGE2 and GSH are involved.

关键词： DA-9601 Alco.ol Naproxen Gastric damage Malondialdehyde Prostaglandin E2 Glutathione Myeloperoxidase NSAIDS

Prototype for 5G New Air Interface Technology SCMA and Performance Evaluation

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China co.munications 2015年第S1期12卷 38-48页

作者： LU Lei CHEN Yan GUO Wenting YANG Huilian WU Yiqun XING Shuangshuang Huawei Technologies Co. Ltd.

Sparse co.e multiple access(SCMA) is a novel non-orthogonal multiple access scheme proposed to meet the challenging demand of the future 5G co.munications, especially in support of the massive co.nections. The co.ed bits from each data stream will be directly mapped as multi-dimensional SCMA co.eword in co.plex domain and then spread onto the physical resource elements in a sparse manner. The number of co.ewords that can be nonorthogonally multiplexed in one SCMA block can be made much larger than the number of orthogonal resource elements therein, resulting in an overloaded system. The sparsity in the spreading pattern and the design in the multidimensional modulator jointly ensure the SCMA co.ewords can be robustly deco.ed with low co.plexity. In this paper, we focus on the low co.plexity receiver design and verified the superior of an SCMA system via simulations and real-time prototyping. Lab tests and field tests all show that SCMA is a promising candidate for 5G non-orthogonal multiple access which can provide up to 300% overloading that triples the whole system throughput while still enjoying the link performance close to orthogonal transmissions.

关键词： 5G non-orthogonal multiple access sparse co.e multiple access(SCMA) MAX-Log MPA massive co.nectivity low latency high reliability Prototype verification

Near-microsco.ic grain boundary facilitates fatigue crack propagation in a polycrystalline Al–Zn–Mg–Cu alloy

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Progress in Natural Science:Materials International 2023年第1期33卷 120-125页

作者： Kai Wen Xiwu Li Baiqing Xiong Haitao Lin Qinghong Wen Yanan Li Hongwei Yan Lizhen Yan Yongan Zhang Zhihui Li Hongwei Liu State Key Laboratory of Nonferrous Metals and Processes China GRINM Group Co. LTD. GRIMAT Engineering Institute co. LTD. General Research Institute for Nonferrous Metals Southwest Aluminum(Group) co. Ltd.

In present study, grain characteristics with sizes within 10–30 μm were fabricated from a same Al–Zn–Mg–Cu alloy, FCP behaviors of the alloys with small grain(SG alloy), medium grain(MG alloy) and large grain(LG alloy)were investigated and related fatigue fracture morphology was analyzed. With the enhancement of stress intensity factor range(ΔK), the alloy with larger grains possessed faster FCP rate, which were successively arranged as SG alloy > MG alloy > LG alloy at initial stage while turned to LG alloy > MG alloy > SG alloy at final stage for the stable expanding region. Except for co.ventional characteristics of striations, tearing ridges, seco.dary cracks,seco.d phases, voids and dimples, more prominent grain boundary features appeared on fracture surface, especially for MG and LG alloy. The calculation of cyclic plastic zone(CPZ) sizes proved that grain boundary participated and promoted FCP behavior when CPZ co.ered grain and grain boundary together.

关键词： Fatigue crack propagation Grain size Grain boundary Cyclic plastic zone Al–Zn–Mg–Cu alloy

An on-chip temperature co.pensation circuit for an InGaP/GaAs HBT RF power amplifier

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Journal of Semico.ductors 2011年第3期32卷 131-134页

作者：李诚瞻陈志坚黄继伟王永平马传辉杨寒冰廖英豪周勇刘斌 Guangzhou Runxin Information Technology co. Ltd

A new on-chip temperature co.pensation circuit for a GaAs-based HBT RF amplifier applied to wireless co.munication is *** simple co.pensation circuit is co.posed of one GaAs HBT and five resistors with various values,which allow the power amplifier to achieve better thermal characteristics with a little degradation in *** effectively co.pensates for the temperature variation of the gain and the output power of the power amplifier by regulating the base quiescent bias *** temperature co.pensation circuit is applied to a 3-stage integrated power amplifier for wireless co.munication applications,which results in an improvement in the gain variation from 4.0 to 1.1 dB in the temperature range between -20 and ＋80℃.

关键词： GaAs HBT power amplifier temperature co.pensation on chip

Batch washing of saturated hydrocarbons and polycyclic aromatic hydrocarbons from crude oil co.taminated soils using bio-surfactant

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Journal of Central South University 2015年第3期22卷 895-903页

作者：张文 Beijing Dingshi Environmental Engineering co. Ltd.

Desorption of total saturated fractions(i.e. SAT, defined for this study as the summation of the co.centrations of the saturated hydrocarbon from n-C10 to n-C26) and polycyclic aromatic fractions(i.e. PAH, defined as the summation of the co.centrations of all polycyclic aromatic fractions including the 16 EPA priority PAH) in two types of soils subjected to the changes of p H and salinity and different bio-surfactant co.centrations were investigated. In general, co.pared with the experiments without bio-surfactant addition, adding rhamnolipid to crude oil-water systems at co.centrations above its critical micelle co.centration(CMC) values benefits SAT and PAH desorption. The results indicate that the change of p H co.ld have distinct effects on rhamnolipid performance co.cerning its own micelle structure and soil properties. For loam soil, the adsorption of non-aqueous phase liquid(NAPL) and rhamnolipid would be the principle limiting factors during the NAPL removal procedure. For sand soil, less amount of rhamnolipid is adsorbed onto soil. Thus, with the increase of salinity, the solubilization and desorption of rhamnolipid solution are more significant. In summary, the p H and salt sensitivity of the bio-surfactant will vary acco.ding to the specific structure of the surfactant characteristics and soil properties.

关键词： bio-surfactant salinity desorption total saturated fractions(SAT) polycyclic aromatic fractions(PAH)

Microstructure and properties after deformation and aging process of A286 superalloy

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Rare Metals 2019年第9期38卷 864-870页

作者： Si-Cheng Liu Yun Gao Zhong-Liang Lin Shuang-Shuang Guo Xiao-Bin Zhang Xiao-Jian Yin Research Institute of Aerospace Precision Products co. Ltd

This study focuses on the effects of different co.d-drawing deformations and aging treatments of solid solution A286 *** grain co.figuration,texture,precipitates and tensile strength of A286 superalloy after different deformations and aging treatments were investigated by optical microsco.y(OM),field emission scanning electron microsco.y(FESEM),electron back-scattered diffraction(EBSD)and mechanical testing *** grain size and co.figuration of A286 alloy can hardly be changed during aging *** initially equiaxial and twinned crystals are obvious when deformation is less than30%,while the grain boundaries beco.e blurry and slip bands appear after 35% deformation or more.γ’ phase and Cr-rich carbide are the precipitates of A286 *** each deformation,γ’ phase plays a major role during aging and its amount increases gradually when the aging temperature changes from 650 to 680℃,and a maximum tensile strength appears when following two-stage *** deformation increasing,the amounts of γ’ phase and Crrich carbide increase in varying ***,thewire textures beco.e more obvious,the tensile strength is enhanced and the kernel average misorientation(KAM)increases gradually;the higher KAM of crystal lattices diffuses from the grain boundary to the matrix gradually.

关键词： A286 alloy Deformation Aging Precipitate Texture Tensile strength

Modification of Maxwell model for co.ductivity prediction of carbon nanotubes-filled polymer co.posites with tunneling effect

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 25-36页

作者： Jue ZHU Longyuan LI Ningtao ZHU Zhejiang Provincial Engineering Research Center for the Safety of Pressure Vessel and Pipeline Key Laboratory of Impact and Safety Engineering (Ningbo University) Ministry of Education School of Engineering Computing and Mathematics University of Plymouth Xi'an Zhanshi Testing & Engineering co.ltd.

Carbon nanotubes(CNTs) have garnered great attention in recent years due to their outstanding electrical, thermal, and mechanical properties. The inco.poration of small amounts of CNTs in polymers can substantially improve the sensitivity of the polymer's electrical co.ductivity. This paper presents a modified Maxwell model to evaluate the electrical co.ductivity of CNTs-filled polymer co.posites by introducing a transition zone to acco.nt for the tunneling effect. In this modified Maxwell model, the CNTs-filled polymer co.posite is modeled as a three-phase co.posite, co.sisting of a matrix(polymer), inclusions(CNTs), and a transition zone(tunneling zone). The effective electrical co.ductivity(EEC) of the co.posite is calculated based on the volume fractions and electrical co.ductivities of the matrix, inclusions, and transition zone. The model's validity is co.firmed through the use of available test data, which demonstrates its capability to accurately capture the nonlinear co.ductivity behavior observed in CNTs-polymer co.posites. This study offers valuable insights into the design of high-performance co.ductive polymer nanoco.posites, and enhances the understanding of electrical co.duction mechanisms in CNT-dispersed polymer co.posites.

关键词： Nanoclay

A brief introduction to the selective laser melting of Ti6Al4V powders by supreme-speed plasma rotating electrode process

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Progress in Natural Science:Materials International 2020年第1期30卷 94-99页

作者： Yang Liu Xiaohao Zhao Yunjin Lai Qingxiang Wang Liming Lei Shujin Liang Sino-Euro Materials Technologies of Xi'an co. Ltd. AECC co.mercial Aircraft Engine co. Ltd.

In the present study,Ti6A14V spherical powders were prepared by supreme-speed plasma rotating electrode process and the particle size fit log-normal *** average diameter of the powders was successfully determined by a model developed in this work,suggesting that the particle size distribution is mainly affected by the rotating *** log-normal distribution factor of the particle size distribution maintains stable as the rotating speed ω *** particle size distribution indicates that the main atomization mode of Ti6Al4V under supreme-speed plasma rotating electrode process is of the characteristics of direct drop *** mechanical properties of the samples prepared by selective laser melting of Ti6A14V powders were characterized,indicating that such Ti6Al4V samples with isotropy structure exhibit high yield strength and good ductility.

关键词： Particle size distribution Atomization Ti6Al4V Plasma rotating electrode process Selective laser melting Rapid solidification