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Behavior of SiO_2 in the leaching process of alumina clinker with high concentration

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Journal of University of Science and Technology Beijing 2008年第5期15卷 538-542页

作者： Bin Chen Xiaobin li guihua liu School of Metallurgical Science and Engineering Central South University Changsha 410083 China

It is essential for alumina production by alkaline process to know the behavior of minerals containing Al and Si in basic solution,and the behavior of SiO2 in the process of clinker leaching is an important portion. To study the behavior of SiO2 in the process of high concentration clinker leaching,experiments were carried out in home-made reactors. The results indicate that factors,such as temperature,time,Al2O3 concentration,as well as SiO2 concentration,have profound impact on the SiO2 and Al2O3 concen-tration of pregnant liquor during the high concentration leaching. However,sodium carbonate and free caustic soda concentrations have no remarkable effect on it,thus they are the secondary factors compared with Al2O3 concentration. The concentration of SiO2 in the pregnant liquor could be reduced to a lower level when the major effect parameters of this process are controlled properly.

关键词： clinker leaching high concentration silica mechanism of secondary reaction

Why Political liberation Is Not the Real Human liberation

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学术界 2020年第6期 202-209页

作者： Su li li guihua School of Marxism liaoning University Shenyang Liaoning 110036 School of Marxism Jilin University Changchun Jilin 130012

Marx’s"Jewish Issue"is an issue of relationship between political liberation and human *** believed that rather than presupposing the abolition of religion and universal human liberation,political liberation is only a historical stage of human liberation,,even though with important historical progressive value. Around this theme,Marx went beyond the perspective of religious criticism and gave priority to the analysis of the modern political state in the field of civil society,lightening the limits of political liberation and the path of human liberation.

关键词： political liberation religious liberation hum an liberation

The Significance of the Historical Materialist View of Labor in the New Era

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学术界 2020年第11期 210-217页

作者： Su li li guihua School of Marxism liaoning University Shenyang Liaoning 110036 School of Marxism Jilin University Changchun Jilin 130012

Labor has the core significance in the philosophy of historical *** concept of labor defines the nature of labor,affirms the decisive role of labor for human and social progress,demonstrates the form,intrinsic quality and inevitable result of labor under the capitalist economic system,and looks forward to the ultimate liberation of human beings brought by labor in Communist society in the *** whole social life of each particular era is fundamentally determined by labor,and labor is the final basis for historical materialism to divide the *** the new era of socialism with Chinese characteristics,historical materialism’s labor concept points out the fundamental way to realize individual value and all-round development,provides a reference path for the development of grassroots democracy,and guides the practice of realizing the great rejuvenation of the Chinese nation.

关键词： Labor historical materialist view of labor the New Era significance

The suitability assessment on site selection for bottom seeding scallop culture based on analytic hierarchy process

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Journal of Oceanology and limnology 2024年第2期42卷 647-663页

作者： Ziniu ZHANG Zhenyan WANG guihua li Meihan ZHAO Wenjian li School of Earth Sciences and Engineering Shandong University of Science and TechnologyQingdao 266590China Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Mineral Resources National Laboratory for Marine Science and TechnologyQingdao 266237China University of Chinese Academy of Sciences Beijing 100049China

Scallop culture is an important way of bottom-seeding marine ranching,which is of great significance to improve the current situation of fishery ***,there are some problems in site-selection evaluation of marine ranching,such as imperfect criteria system,complex structure,untargeted criteria quantification,*** addition,no site-selection evaluation method of bottom-seeding culture areas for scallops is ***,we established a hierarchy structure model according to the analytic hierarchy process(AHP)theory,in which social,physical,chemical,and biological environments are used as main criteria,and marine functional zonation,water depth,current,water temperature,salinity,substrate type,water quality,sediment quality,red tide,phytoplankton,and zooplankton are used as sub-criteria,on which a multi-parameter evaluation system is set ***,the dualism method,assignment method,and membership function method were used to quantify sub-criteria,and a quantitative evaluation for the entire criteria was added,including the evaluation and analysis of two types of unsuitable environmental *** overall consideration in scallop yield,quality,and marine ranching construction objectives,the weight of the main criteria could be *** grades in the suitability corresponding to the evaluation result were divided,and the Python language was used to create an evaluation system for efficient calculation and intuitive presentation of the evaluation *** marine cases were simulated based on existing survey data,and the results prove that the method is feasible for evaluating and analyzing the site selection of bottom-seeding culture areas for scallops under various environmental *** proposed evaluation method can be promoted for the site selection of bottom-seeding marine *** study provided theoretical and methodological references for the site selection evaluation of other types of marine ranching.

关键词： marine ranching bottom-seeding scallops site selection evaluation analytic hierarchy process evaluation system

Tunable emission,energy transfer and thermal stability of Ce^(3+),Tb^(3+) co-doped Na_(2)BaCa(PO_(4))_(2) phosphors

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Journal of Rare Earths 2022年第6期40卷 878-887,I0002页

作者： Jiamin Tang Jiayong Si Xiaoyi Fan Yijia liu guihua li Gemei Cai College of Mechanical and Electrical Engineering Central South University of Forestry and TechnologyChangsha 410004China School of Materials Science and Engineering Central South UniversityChangsha 410083China

A series of single Ce^(3+) doped and Ce^(3+) and Tb^(3+) co-doped Na_(2)BaCa(PO_(4))_(2)(NBCP) phosphors was synthesized by conventional solid-stated reaction *** crystal structure,luminescence properties,thermal stability and energy transfer were carefully ***^(3+) is inferred to substitute the Ba^(2+)site in NBCP *** color-tunable emission from blue to green is observed by adjusting Tb^(3+) concentration among NBCP:0.03 Ce^(3+),yTb^(3+) *** energy transfer behavior from Ce^(3+) to Tb^(3+) ions is both illustrated by co-doped PL spectra and decay *** energy transfer efficiency is as high as 91.5%.The mechanism of energy transfer is resonance type of dipole-dipole *** this work,the optimal phosphor exhibits the excellent thermal stability which keeps at 94.9% of that initial value at room temperature when temperature reaches to 150℃.The Ce^(3+) and Tb^(3+) co-doped NBCP phosphor is a promising candidate for the application in the general lighting and display fields.

关键词： Na_(2)BaCa(PO_(4))_(2) Luminescence properties Energy transfer Tunable emission Thermal stability Rare earths

Influences of Similar Elements on Glass Forming Ability and Magnetic Properties in Al-Ni-La Amorphous Alloy

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Journal of Materials Science & Technology 2010年第2期26卷 146-150页

作者： guihua li Weimin Wang Xiufang Bian li Wang Jiteng Zhang Rui li Tao Huang Key Laboratory for liquid-Solid Structureal Evolution and Processing of Materials Ministry of Education ShandongUniversity Jinan 250061 China

Similar element substitution has been applied for improving glass forming ability （GFA） in AI86NigLa5 amor- phous alloy. The effects of La-Ce and Ni-Co pairs on the GFA, magnetic properties and hardness of Al-Ni-La alloy were investigated by using X-ray diffraction （XRD）, transmission electron microscopy （TEM）, differential scanning calorimetry （DSC）, magnetometer and hardness-tester. The results show the GFA of the samples in the order of Al86（Ni0.5Co0.5）9（La0.5Ce0.5）5〈 A186Ni9Las〈A186Ni9（La0.5Ce0.5）5, implying that similar element substitution has a limited enhancing effect on the GFA of the present Al-Ni-La alloy. In addition, the measured samples display a diamagnetic behavior at room temperature. The variations of diamagnetic behavior as well as the microhardness of the samples are strongly dependent on the microstructure, i.e., the amounts of the icosahedral structure and precipitates, after the similar element substitution in the Al-Ni-La alloy.

关键词： X-ray diffraction (XRD) Transmission electron microscopy (TEM) Diamagneticbehavior Icosahedral structure

Corrosion and tribocorrosion resistance of MAO-based composite coating on AZ31 magnesium alloy

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Journal of Magnesium and Alloys 2022年第12期10卷 3406-3417页

作者： Siqin liu guihua li Yuming Qi Zhenjun Peng Yinping Ye Jun liang State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000PR China Key Laboratory of Science and Technology on Wear and Protection of Materials Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000PR China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049PR China

In this paper, a multi-functional composite coating with low friction coefficient, high wear resistance and excellent tribocorrosion resistance is fabricated on AZ31 Mg alloys by micro-arc oxidation and spray-coating methods. The microstructure, and composition of the coating are characterized by SEM, EDS, XRD, and FT-IR. Potentiodynamic polarization and EIS tests are conducted to evaluate the corrosion resistance of the composite coating. The tribocorrosion property is also studied using pin-on-disk tribometer in 3.5 wt.% Na Cl solution. It is found that the composite coating possesses better long-term corrosion resistance than the single MAO coating. The tribocorrosion tests prove that the composite coating exhibits much better wear and tribocorrosion resistance than the single MAO coating and can protect the substrate from corrosion under a sliding condition.

关键词： Magnesium alloy Micro-arc oxidation Composite coating Corrosion Tribocorrosion

Mesoproterozoic Continental Arc Type Granite in the Central Tianshan Mountains:Zircon SHRIMP U-Pb Dating and Geochemical Analyses

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Acta Geologica Sinica(English Edition) 2008年第1期82卷 117-125页

作者： YANG Tiannan li Jinyi SUN guihua WANG Yanbin Institute of Geology Chinese Academy of Geological Sciences Beijing 100037

The Central Tianshan belt in northwestern China is a small Precambrian block located in the southern part of the Central Asia Orogenic Belt （CAOB）, which is considered as ＂the most voluminous block of young continental crust in the world＂ that comprises numerous small continental blocks separated by Paleozoic magmatic arcs. The Precambrian basement of the central Tianshan Mountains is composed of volcanic rocks and associated volcano-sedimentary rocks that were intruded by granitic plutons. Geochemical analyses demonstrate that the granitic plutons and volcanic rocks were generated in the Andean-type active continental arc environment like today＇s Chile, and the zircon U-Pb SHRIMP dating indicates that they were developed at about 956 Ma, possibly corresponding to the subduction of the inferred Mozambique Ocean under the Baltic-African super-continent.

关键词： Mesoproterozoic granite pluton magmatic arc Central Tianshan

Crystallization and Corrosion Resistance of (Fe_(0.78)Si_(0.09)B_(0.13))100_(-x)Ni_x (x=0,2 and 5) Glassy Alloys

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Journal of Materials Science & Technology 2011年第12期27卷 1169-1177页

作者： Haitian Ma Weimin Wang die Zhang guihua li Chongde Cao Hongdi Zhang Key Laboratory for liquid-Solid Structural Evolution and Processing of Materials （Ministry of Education） Shandong University Jinan 250061 China School of Mechannical and Eiectrical Engineering Weifang University Weifang 261061 China Shandong Institute of Metrology Jinan 250014 China Department of Applied Physics Northwestern Polytechnical University Xitan 710072 China

The crystallization of the （Fe0.78Si0.09B0.13）100-xNix glassy alloys （x=O, 2 and 5） has been investigated by X-ray diffraction （XRD） and differential scanning calorimeter （DSC）. Corrosion resistance analyses have been carried out using electrochemical measurements and corrosion products have been analyzed by scanning electron microscopy （SEM）. The experimental results show that the addition of Ni can promote the nucleation of c^-Fe, retard the decomposition of the metastable borides, and alter the crystallization mode of the present Fe-based glassy alloys. The lattice constant （ao^e） of c^-Fe in the annealed samples shows a decreasing trend with increasing annealing time. The Ni addition can improve the corrosion resistance of the as-quenched Fe-based glassy alloys in H2S04, NaCI and NaOH solutions. The results indicate that Ni can promote the diffusion of Si atoms during quenching and annealing processes.

关键词： Crystallization Corrosion resistance Fe-based glassy alloys