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DEFORMATION AND STRENGTHENING OF COLD-DRAWN STEEL WIRES

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Acta Metallurgica Sinica(English Letters) 1992年第1期5卷 29-32页

作者： Shi, Deke liu, junhai Hao, Hongqi Xi'an Jiaotong Univ Xi'an China

It was shown by the study of TEM that the fine lamellar pearlite becomes a ductile phase dur- ing cold *** exist many ledges to emit dislocations at Fe_3C/Fe *** is one of the reasons that high density of dislocations emerges at the Fe_3C/Fe interface. Furthermore,there are some evidences to support that dislocation cuts through Fe_***- fore,it is necessary to consider the contribution of cementite being sheared strengthening.

关键词： cold-drawn steel wire dislocation cell ledge

Co encapsulated N-doped carbon nanotubes as robust catalyst for valorization of levulinic acid in aqueous media

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Journal of Energy Chemistry 2021年第1期30卷 12-19,I0001页

作者： Xiangjin Kong Weijie Geng Wenxiu Li Lin liu Xiaoqi Yan Longchen Gong junhai liu School of Chemistry and Chemical Engineering Shandong Provincial Key Laboratory/Collaborative Innovation Center of Chemical Energy Storage&Novel Cell TechnologyLiaocheng UniversityLiaocheng 252000ShandongChina

The construction of an acid resistant catalyst for synthesis of γ-valerolactone from levulinic acid in aqueous media is an important but highly challenging ***,an efficient Co@NCNT-800(after 800℃ pyrolysis) catalyst was constructed by confining Co in N-doped carbon nano-tubes(NCNT) from low cost materials by a facile *** with the characterization results and control experiments,the in situ formed Co and Co-Ox, but not Co-Nx, proved to be the main synergistic active sites of the *** was also found that Co species are completely isolated within the bamboo-like NCNT,which could protect the metal nanoparticles from agglomeration and leaching in the strong acid reaction *** γ-valerolactone yield of no less than 99.9% can be obtained under a relatively mild condition,and the catalytic performance has not been significantly reduced within five ***,this work may pave a way for the design of robust non-noble catalyst,and has potential for the production of γ-valerolactone from biomass in large-scale industries.

关键词： Levulinic acid γ-Valerolactone Co@N-doped carbon nanotubes Aqueous phase reaction

Thermal Kinetics and Decomposition Mechanism of Methylphenylphosphinic Acid and Diphenylphosphinic Acid

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Chemical Research in Chinese Universities 2014年第6期30卷 1028-1031页

作者： SHAO Xianzhao Jl Xiaohui MIN Suotian liu junhai WANG Wei School of Chemistry and Environment Science Shaanxi University of Technology Hanzhong 723001 P. R. China

Thermal degradation and degradation kinetics of methylphenylphosphinic acid（MPPA） and diphenyl- phosphinic acid（DPPA） were investigated via thermogravimetric analysis（TGA） technique under non-isothermal conditions. The activation energies of the decomposition process for the two compounds were calculated through the Friedman and Kissinger-Akahira-Sunose（KAS） methods. The thermal decomposition mechanism was investigated by the Criado method based on a set of TGA data obtained at different heating rates. It was shown that the activation energies calculated from the decomposition reaction by different methods were consistent with each other. The results show that the probable model for the degradation of MPPA and DPPA agreed with the two-dimensional（D2） and three-dimensional（D4） diffusion models, respectively. Moreover, the thermodynamic functions（△H, △S, △G） of the two decomnosition reactions were also calculated.

关键词： Organophosphinic acid Thermogravimetric analysis Thermal degradation Kinetics

Influence of process parameters on microstructure of reactive plasma cladding TiC-Fe-Cr coating

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China Welding 2021年第2期30卷 35-41页

作者： liu Junbo Wang Limei liu junhai School of Mechanical-electronic and Vehicle Engineering Weifang UniversityWeifang 261061China School of Information and Control Engineering Weifang 261061China Naval Architecture&Marine Engineering College Shandong Jiaotong UniversityWeihai 264209China

A certain amount of Ti was added to the plasma cladding Fe-Cr-C coating in the early stage in order to improve the quality and properties of the ***-Fe-Cr-C composite powder was prepared by precursor carbonization-composition *** situ synthesized TiC-Fe-Cr coatings were fabricated on substrate of Q235 steel by plasma cladding process with the composite *** of the coatings with different process parameters,including cladding current,cladding speed,number of overlapping cladding layers,were analyzed by scanning electron *** results show that the structure of the TiC-Fe-Cr coating is greatly affected by the cladding current,the cladding speed and the overlapping cladding *** this test,when the cladding current of 300 A and the cladding process parameter of the cladding speed of 50 mm/min are clad with three layers,a well-formed and well-structured TiC-Fe-Cr coating can be obtained in this ***-Fe-Cr coating has good wear resistance and good load characteristics under dry sliding wear test conditions.

关键词： TiC-Fe-Cr coating plasma cladding process parameters microstructure

Multiple evaluations of atmospheric behavior between Criegee intermediates and HCHO: Gas-phase and air-water interface reaction

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Journal of Environmental Sciences 2023年第5期127卷 308-319页

作者： Tianlei Zhang Mingjie Wen Chao Ding Yongqi Zhang Xiaohui Ma Zhuqing Wang Makroni Lily junhai liu Rui Wang Institute of Theoretical and Computational Chemistry Shaanxi Key Laboratory of CatalysisSchool of Chemical&Environment ScienceShaanxi University of TechnologyHanzhong 723001China School of Environmental Science and Engineering Institute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China Shandong Key Laboratory of Biophysics Institute of BiophysicsDezhou UniversityDezhou 253023China Environmental Research Institute Shandong UniversityQingdao 266237China Qinba Mountains of Bio-Resource Collaborative Innovation Center of Southern Shaanxi Province Shaanxi University of TechnologyHanzhong 723001China

Given the high abundance of water in the atmosphere,the reaction of Criegee intermediates(CIs)with(H_(2)O)_(2) is considered to be the predominant removal pathway for ***,recent experimental findings reported that the reactions of CIs with organic acids and carbonyls are faster than *** the same time,the interface behavior between CIs and carbonyls has not been reported so ***,the gas-phase and air-water interface behavior between Criegee intermediates and HCHO were explored by adopting high-level quantum chemical calculations and Born-Oppenheimer molecular dynamics(BOMD)*** chemical calculations evidence that the gas-phase reactions of CIs+HCHO are submerged energy or low energy barriers *** rate ratios speculate that the HCHO could be not only a significant tropospheric scavenger of CIs,but also an inhibitor in the oxidizing ability of CIs on SO_(x) in dry and highly polluted areas with abundant HCHO *** reactions of CH_(2)OO with HCHO at the droplet’s surface follow a loop structure mechanism to produce i)SOZ(■),ii)BHMP(HOCH_(2)OOCH_(2)OH),and iii)HMHP(HOCH_(2)OOH).Considering the harsh reaction conditions between CIs and HCHO at the interface(i.e.,the two molecules must be sufficiently close to each other),the hydration of CIs is still their main atmospheric loss *** results could help us get a better interpretation of the underlying CIs-aldehydes chemical processes in the global polluted urban atmospheres.

关键词： Criegee intermediates HCHO Atmospheric behavior Air-water interface Chemical processes

Cu-Co bi-metal catalyst prepared by perovskite CuO/LaCoO_3 used for higher alcohol synthesis from syngas

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Journal of Energy Chemistry 2014年第4期23卷 527-534页

作者： Yuzhen Fang Yuan liu Wei Deng junhai liu Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology School of Chemistry and Chemical EngineeringLiaocheng University Tianjin Key Laboratory of Applied Catalysis Science and Engineering Department of Catalysis Science and Technology School of Chemical Engineering Tianjin University

Cu-Co bi-metal catalysts derived from CuO/LaCoO3 perovskite structure were prepared by one-step citrate complexing method, and the structure evolution reaction from CuO/LaCoO3 to Cu-Co2C/La202CO3 under 1-12 pretreatment was investigated by techniques of XRD, TPR and TEM. The results suggest that a much higher dispersion of copper significantly enhanced the reduction of cobalt, and a stronger interaction between copper and cobalt ions in LaCoO3 particles led to the formation of bi-metallic Cu-Co particles in the reduced catalysts and the enrichment of Co on the surface of bimetallic particles. The prepared catalysts were highly active and selective for the alcohol synthesis from syngas due to the presence of copper-modified C02C species.

关键词： perovskite bi-metal higher alcohols synthesis Cu-Co syngas

Study of the Optimization of the Ultrasonic Extraction Technology of Gelatin from the Scales of Aristichthys Nobilis by Means of Quadratic Regression Orthogonal Optimization

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材料科学与工程（中英文B版） 2014年第10期4卷 310-317页

作者： Xiaozhou Huang junhai liu Shaanxi University of Technology Hanzhong 723001 China

Experimental Investigation of Thermal Lensing in End-pumped Nd∶YVO4 Crystal Using a New Simple Approach

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Chinese Journal of Lasers 1999年第2期8卷 8-13页

作者： liu junhai LU Jianren LU Junhua SHAO Zongshu JIANG Minhua (National Laboratory of Crystal Materials, Shandong University, Jinan 250100, China) 山东大学晶体材料国家重点实验室山东济南 250100 山东大学晶体材料国家重点实验室山东济南

１ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｈｉｇｈｐｏｗｅｒｓｏｌｉｄｓｔａｔｅｌａｓｅｒｓ，ｐｕｍｐｉｎｄｕｃｅｄｔｈｅｒｍａｌｆｏｃｕｓｉｎｇｉｓｏｆｐｒｉｍａｒｙｉｍｐｏｒｔａｎｃｅｂｅｃａｕｓｅｏｆｉｔｓｓｉｇｎｉ... 详细信息

１ＩｎｔｒｏｄｕｃｔｉｏｎＩｎｈｉｇｈｐｏｗｅｒｓｏｌｉｄｓｔａｔｅｌａｓｅｒｓ，ｐｕｍｐｉｎｄｕｃｅｄｔｈｅｒｍａｌｆｏｃｕｓｉｎｇｉｓｏｆｐｒｉｍａｒｙｉｍｐｏｒｔａｎｃｅｂｅｃａｕｓｅｏｆｉｔｓｓｉｇｎｉｆｉｃａｎｔｉｎｆｌｕｅｎｃｅｓｏ...

关键词： thermal lensing thermal focal length Nd∶YVO 4 crystal resonator stability

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基于公司理性自治的公司法规范重塑

法学评论 2021年第5期39卷 1-12页

作者：刘俊海中国人民大学法学院

鼓励公司理性自治是公司法现代化的必由之路。理性自治源于公司作为营利法人的本质属性,乃市场无形之手。立法者、监管者和裁判者应尊重和保障公司自治权。公司法应尽量为公司自治法预留空间,确保其在公司法规范体系中处于基础性地位。... 详细信息

鼓励公司理性自治是公司法现代化的必由之路。理性自治源于公司作为营利法人的本质属性,乃市场无形之手。立法者、监管者和裁判者应尊重和保障公司自治权。公司法应尽量为公司自治法预留空间,确保其在公司法规范体系中处于基础性地位。要鼓励立法者与公司的制度竞争,章程应在登记时同步公示。《公司法》应以私法规范为主,公法规范为辅。要允许公司自由选择治理结构和规则;股东会中心主义、董事会中心主义或总经理中心主义的选择属公司自治范畴;股东人合性和公司闭锁性取决于公司自治。

关键词：理性自治公司自治法倡导性规范强制性规范效力性规范