检索结果-南通市图书馆

Synergistic mechanism of metal ions and sodium N-oleoylsarcosinate on flotation separation of lepidolite from feldspar

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of China 2025年第1期35卷 296-312页

作者： Guo-yuan XIANG Rui-hua FAN Wen-tao ZHU Wei SUN Ren-ji ZHENG zhi-yong gao School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources Central South UniversityChangsha 410083China Hunan International Joint Research Centre for Efficient and Clean Utilization of Critical Metal Mineral Resources Central South UniversityChangsha 410083China Engineering Research Center of Ministry of Education for Carbon Emission Reduction in Metal Resource Exploitation and Utilization Central South UniversityChangsha 410083China

The combined reagents of sodium N-oleoylsarcosinate(SNOS)with metal ions(Ca(Ⅱ),Mg(Ⅱ),Cu(Ⅱ),and Pb(Ⅱ))was employed to facilitate the separation of lepidolite from *** synergistic interaction mechanism of this combined reagent was systematically investigated via contact angle measurements,AFM,FTIR,species distribution calculations,and DFT *** results suggested that Ca(Ⅱ)exhibited the best selectivity for activating lepidolite *** was chemically adsorbed on the Ca(Ⅱ)-activated lepidolite surface with an adsorption energy of−1248.91 kJ/mol while a lower adsorption energy of−598.84 kJ/mol of SNOS on Ca(Ⅱ)-activated feldspar was ***,this combination of SNOS and Ca(Ⅱ)is a promising reagent scheme for the efficient recovery of lithium from aluminosilicate ore.

关键词： flotation lepidolite feldspar sodium N-oleoylsarcosinate metal ions

Effect of low-energy proton on the microstructure, martensitic transformation and mechanical properties of irradiated Ni-rich TiNi alloy thin films

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2020年第4期27卷 538-543页

作者： Hai-zhen Wang Yun-dong Zhao Yue-hui Ma zhi-yong gao Science and Technology on Materials Performance Evaluation in Space Environment Laboratory School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150001China Lanzhou Seemine SMA Co.Ltd. Lanzhou 730010China

Ni–48.5at%Ti thin films were irradiated in the austenite phase by different energy-level protons at a dose rate of 1.85×1012 p/(cm2·s),and the total dose was 2.0×1016 p/*** microstructures of the thin films before and after irradiation were evaluated by transmission electron microscopy(TEM)and grazing-incidence X-ray diffraction(GIXRD),which showed that the volume fraction of Ti3Ni4 phase elevated with proton energy *** influence of proton irradiation on the transformation behavior of the TiNi thin films was investigated by differential scanning calorimetry(DSC).Compared with the unirradiation film,the reverse transformation start temperatures(As)decreased by about 3°C after 120 keV *** proton irradiation also had a significant effect on the mechanical properties of the TiNi thin *** 120 keV energy proton-irradiation,the fracture strength increased by 8.44%,and the critical stress increased by 21.1%.In addition,the nanoindenter measurement image showed that the hardness of the thin films increased with the increase of proton-irradiation *** may be due to the defects caused by irradiation,which strengthen the matrix.

关键词： TiNi thin film proton irradiation microstructure martensitic transformation mechanical properties

Treatment effects and periodontal status of chronic periodontitis after routine Er:YAG laser-assisted therapy

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2021年第32期9卷 9762-9769页

作者： yong-zhi gao Yan Li Shan-Shan Chen Bo Feng Hui Wang Qiao Wang Department of Stomatology The First Affiliated Hospital of Qiqihar Medical UniversityQiqihar 161041Heilongjiang ProvinceChina Department of Anatomy Basic Medical CollegeZunyi Medical UniversityZunyi 563006Guizhou ProvinceChina The Ward of Department of Ophthalmology and Torhinolaryngology The First Affiliated Hospital of Qiqihar Medical UniversityQiqihar 161041Heilongjiang ProvinceChina Department of Stomatology Qiqihar ENT HospitalQiqihar 161006Heilongjiang ProvinceChina Department of Stomatology The Second Affiliated Hospital of Qiqihar Medical UniversityQiqihar 161005Heilongjiang ProvinceChina

BACKGROUND Routine preclinical interventions for patients with chronic periodontitis such as supragingival cleaning and subgingival curettage,establishing a balanced occlusal relationship,and irrigation with 3%hydrogen peroxide can relieve the symptoms to some ***,there is room for improvement in the overall *** example,Er:YAG lasers can quickly increase the temperature of the irradiated tissue,effectively eliminate dental plaque and calculus,reduce periodontal pockets,adjust periodontal microecology,and reduce the gingival *** content of factors in the liquid,and then achieve the purpose of *** The aim was evaluate the effect of Er:YAG laser-assisted routine therapy on the periodontal status in chronic *** Between October 2018 and January 2020,106 patients with chronic periodontitis in our hospital were randomly assigned to either the study or control group,with 53 patients in each *** control group underwent routine therapy,and the study group underwent Er:YAG laser therapy in addition to routine *** evaluated the treatment outcome in both *** status was determined by clinical attachment loss(CAL),gingival index(GI),periodontal probing depth(PD),dental plaque index(PLI),and sulcular bleeding index(SBI),inflammatory factors in the gingival crevicular fluid,tumor necrosis factor-α(TNF-α),interleukin-6(IL-6),IL-8],and colony forming units(CFUs).RESULTS Total effectiveness in the study group(94.34%)was higher than that in the control group(79.25%,P0.05).However,after treatment,the parameters in the study group(PD,2.97±0.38 mm;CAL,2.71±0.64 mm;SBI,2.07±0.32;GI,0.51±0.11;PLI,1.29±0.34)were lower than those in the

关键词： Er:YAG laser therapy Chronic periodontitis Periodontal status Oral inflammatory factors

Deposition and characterization for high-quality Ti-Ni-Cu thin films with higher Cu content

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2021年第8期40卷 2127-2133页

作者： Jun Li Xiao-Yang Yi Yu Zheng Jing Wang Hai-Zhen Wang Xiang-Long Meng zhi-yong gao Yue-Hui Ma College of Mechanical and Electrical Engineering Northeast Forestry University150001HarbinChina School of Materials Science and Engineering Harbin Institute of Technology150001HarbinChina Lanzhou Seemine SMA Co.Ltd 730010LanzhouChina

In order to attain high-quality Ti-Ni-Cu film,the surface morphologies,chemical compositions and mechanical properties of Ti-Ni-Cu thin films prepared by direct current(DC)magnetron sputtering at various processes were characterized by scanning electron microscopy(SEM),X-ray diffractometer(XRD)and tensile *** type of substrates,Ar pressure and sputtering power had significant effects on the quality and chemical composition of Ti-Ni-Cu thin *** with Si and SiO_(2) slides,it was easier to obtain freestanding films by adopting glass or piezoid slide as *** Ti-Ni-Cu thin film deposited at lower pressure(0.10 Pa)had a better *** surface was featured with porous structure in the Ti-Ni-Cu thin film prepared by higher Ar pressure of 0.36 *** addition,both the tensile strength and strain of annealed Ti-Ni-Cu thin film continuously increased with Ar pressure *** density contributed to the superior mechanical *** deposition rate firstly increased and then decreased with Ar pressure and sputtering power *** composition of deposited Ti-Ni-Cu film can be tailored by changing sputter *** deposited Ti-Ni-Cu thin films at different processing parameters were in amorphous *** short,the present study offered the important theoretical basis for the preparation of Ti-Ni-Cu thin film with higher quality and performance.

关键词： Ti-Ni-Cu thin film DC magnetron sputtering Sputtering parameters Chemical composition Surface morphology

Core engineering of paired core-shell silver nanoclusters

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2021年第12期64卷 2118-2124页

作者： Shan-Shan Zhang Rui-Chen Liu Xiao-Chen Zhang Lei Feng Qing-Wang Xue zhi-yong gao Chen-Ho Tung Di Sun Key Lab of Colloid and Interface Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringState Key Laboratory of Crystal MaterialsShandong UniversityJinan250100China School of Chemistry and Chemical Engineering Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine ChemicalsKey Laboratory of Green Chemical Media and ReactionsMinistry of EducationHenan Normal UniversityXinxiang453007China Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology School of Chemistry and Chemical EngineeringLiaocheng UniversityLiaocheng252000China

Unlike the facile modulation of surface structure through protecting ligands,the core shielded by outer shell of silver nanoclusters is still hard to be *** effects may seep into the incipient growth of silver ***,the comparable cases to validate such hypothesis are currently ***,we shed light on two core-shell silver nanoclusters,Ag_(7)S_(6)@Ag_(48)(SD/Ag55b,SD=SunDi)and Ag_(6)S_(6)@Ag_(48)(SD/Ag54b),differing in only one silver atom in the core which varies from a pentagon-bipyramidal Ag_(7)to an octahedral Ag_(6)while keeping the Ag_(48)shielding shell almost the *** no direct bonding between alkynes and silver core is observed in them,we propose that the ligand effect still exerts profound influences on the size and geometry of silver *** solution behaviours and complete ligand-exchange reaction of SD/Ag55b in CH_(2)Cl_(2)are investigated using electrospray ionization mass *** to more and stronger argentophilic interactions,SD/Ag55b exhibits room-temperature phosphorescence with a 40 nm red-shift compared to that of SD/Ag54b in CH_(2)Cl_(2).This work not only presents effective fabrication of silver nanoclusters via synergism of dithiophosphate and alkyne ligands,but also provides us a pair of comparable examples to understand substitution group effect of protecting ligand on the core structures and properties.

关键词： silver nanocluster core engineering argentophilic interactions red-shifted phosphorescence dynamic ligand exchange

Anionic passivation layer-assisted trapping of an icosahedral Ag_(13)kernel in a truncated tetrahedral Ag_(89)nanocluster

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2021年第9期64卷 1482-1486页

作者： Yan-Min Su Bao-Qian Ji zhi Wang Shan-Shan Zhang Lei Feng zhi-yong gao Yun-Wu Li Chen-Ho Tung Di Sun Lan-Sun Zheng Key Lab of Colloid and Interface Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringState Key Laboratory of Crystal MaterialsShandong UniversityJinan250100China School of Chemistry and Chemical Engineering Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine ChemicalsKey Laboratory of Green Chemical Media and ReactionsMinistry of EducationHenan Normal UniversityXinxiang453007China Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology School of Chemistry and Chemical EngineeringLiaocheng UniversityLiaocheng252000China State Key Laboratory for Physical Chemistry of Solid Surfaces Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005China

Isolating reductive silver kernel from shell is a challenging task but is quite important to understand the embryonic form during the formation of silver *** intercalation of suitable anionic species may be of benefit for passivating then capturing such highly active ***,we successfully isolated a novel silver thiolate nanocluster[Ag_(13)@Ag_(76)S_(16)(Cyh S)_(42)(p-NH_(2)-Ph As O_(3))_(4)]^(3+)(SD/Ag89 a,Cyh SH=cyclohexanethiol)that contains a well-isolated icosahedral Ag_(13) kernel passivated by four Ag S_(4)^(7-) tetrahedra and four p-NH_(2) Ph As O_(3)^(2-) piercing from outer Ag_(72) *** note,this Ag_(13) kernel is the largest isolable subvalent silver kernel beneath the silver shell with extremely legible core-shell boundary ever before and represents a precise embryonic model formed in the reducing Ag(I)to Ag(0)followed by aggregating to large silver *** reductive role of DMF and the introduction of anionic passivation layer(APL)synergistically modulate the reduction kinetics,facilitating the capture of ultrasmall subvalent silver ***/Ag89 a emits in near infrared(NIR)region(λ_(em)=800 nm)at low *** synthetic strategy shown in this work opens up new opportunities for precisely capturing and recognizing diverse reductive silver kernels in different systems.

关键词： silver cluster anionic passivation layer X-ray structure luminescence

Typical roles of metal ions in mineral flotation:A review

在线全文

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of China 2021年第7期31卷 2081-2101页

作者： zhi-yong gao Zhe-yi JIANG Wei SUN Yue-sheng gao School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources Central South UniversityChangsha 410083China Department of Chemical Engineering Michigan Technological UniversityHoughton 49931United States

In flotation,metal ions possess significant roles that are usually fulfilled by either selectively activating or depressing the target *** that tremendous efforts have been made to address the roles of metal ions in flotation,it still lacks a comprehensive review,especially to compare various ions instead of focusing on a specific *** review begins by elaborately categorizing the factors involved in affecting the roles of metal ions in *** that,well-accepted mechanisms are updated and discussed from the ore ***,typical approaches to explore the underlying mechanisms are emphasized,including traditional techniques such as micro-flotation,contact angle measurement,zeta potential measurement,and other recent prevailing methodologies,like computational method,solution chemistry calculation,and cyclic *** work will pave the way to promote flotations via activities like selectively adding/reducing metal ions,choosing reagents,and regulating the slurry chemistry.

关键词： metal ions flotation oxide mineral silicate mineral sulfide mineral

Double Glow Plasma Surface Alloyed Burn-resistant Titanium Alloy

在线全文

学校读者我要写书评

暂无评论

材料热处理学报 2004年第05B期25卷 671-673页

作者： ZHANGPing-ze XUZhong HEzhi-yong ZHANGgao-hui TaiyuanUniversityofTechnology TaiyuanShanxi030024P.R.China

Conventional titanium alloy may be ignited and burnt under high temperature, high pressure and high gas flow velocity condition. In order to avoid this problem, we have developed a new kind of burn-resistant titanium alloy—double glow plasma surface alloying burn-resistant titanium alloy. Alloying element Cr , Mo, Cu are induced into the TJ-6A1-4V and Ti-6.5Al-0.3Mo-l.5Zr-0.25Si substrates according to double glow discharge phenomenon, Ti-Cr ,Ti-Mo, Ti-Cu binary burn-resistant alloy layers are formed on the surface of Ti-6Al-4V and Ti-6.5Al-0.3Mo-l.5Zr-0.25Si alloys. The depth of the surface burn-resistant alloy layer can reach to above 200 microns and alloying element concentration can reach 90%. Burn-resistant property experiments reveal that if Cr concentration reach to 14%, Cu concentration reach to 12%, Mo concentration reach to 10% in the alloying layers, ignition and burn of titanium alloy can be effectively avoided.

关键词：表面铸合抗烧性钛合金热处理双重辉光放电

Effect of Sn Content on the Microstructural Features, Martensitic Transformation and Mechanical Properties in Ti-V-Al-Based Shape Memory Alloys

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2023年第8期36卷 1247-1260页

作者： Xiao-Yang Yi Wei Liu Yun-Fei Wang Bo-Wen Huang Xin-Jian Cao Kui-Shan Sun Xiao Liu Xiang-Long Meng zhi-yong gao Hai-Zhen Wang Department of Nuclear Equipment College of Nuclear Equipment and Nuclear EngineeringYantai UniversityYantai264005China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin150001China Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing Yantai264005China

In the present study, it is expected to tailor the microstructural features, martensitic transformation temperatures and mechanical properties of Ti-V-Al shape memory alloys through adding Sn alloying elements, which further expands their applications. Sn addition results in the monotonous rising of average valence electron number (e/a). In proportion, the single α″ martensite phase directly evolves into merely β parent phase in present Ti-V-Al-based shape memory alloys, as Sn content increases from 0.5 to 5.0 at.%. Meanwhile, Sn addition causes the reduction in the grain size. Combined with transmission electron microscopy (TEM) observation and d electron theory analysis, it can be speculated that Sn addition can suppress the precipitation of ω phase. With increasing Sn content, fracture strength invariably decreases from 962 to 792 MPa, whereas the yield strength firstly decreases and then increases. The lowest yield stress for the stress-induced martensitic transformation of 220 MPa can be obtained in Ti-V-Al shape memory alloy by adding 3.0 at.% Sn. By optimizing 1.0 at.% Sn, the excellent ductility with a largest elongation of 42.1% can be gained in Ti-V-Al shape memory alloy, which is larger than that of the reported Ti-V-Al-based shape memory alloys. Besides, as a result of solution strengthening and grain refinement, Ti-V-Al-based shape memory alloy with 5.0 at.% Sn possesses the highest yield strength, further contributing to the excellent strain recovery characteristics with 4% fully recoverable strain.

关键词： Ti-V-Al alloy Lightweight shape memory alloy Microstructural features Mechanical properties strain recoverycharacteristics