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Improved continuous precipitation kinetics and tensile properties of extruded AZ80 alloy through {10-12} twin formation
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作者 Hyun Ji Kim Sumi Jo Sung Hyuk Park 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2023年第9期3323-3337,共15页
This study investigates the effect of {10-12} deformation twins on the continuous precipitation behavior of an extruded Mg-8.0Al-0.5Zn-0.2Mn(AZ80) alloy during aging. The extruded AZ80 alloy is compressed along the tr... This study investigates the effect of {10-12} deformation twins on the continuous precipitation behavior of an extruded Mg-8.0Al-0.5Zn-0.2Mn(AZ80) alloy during aging. The extruded AZ80 alloy is compressed along the transverse direction to introduce {10-12} twins,followed by an aging treatment at 300 ℃. The extruded material exhibits a twin-free microstructure with low internal strain energy, whereas the pre-twinned material possesses abundant {10-12} twins and has high internal strain energy. The aging results reveal that the peak-aging time of the pre-twinned material(1 h) is one-eighth of that of the extruded material(8 h). Although Mg_(17)Al_(12) continuous precipitates(CPs)are observed in both the peak-aged materials, these CPs are much smaller and more densely distributed in the pre-twinned material despite the significantly shorter aging time. The CPs size in the peak-aged materials increases in the following order: twinned region in the pre-twinned material(0.47 μm) < residual matrix region in the pre-twinned material(1.71 μm) < matrix region in the extruded material(2.55 μm).Moreover, the CPs number density in the twinned region of the pre-twinned material is approximately 11 times higher than that in the matrix region of the extruded material. The peak-aged pre-twinned material exhibits significantly higher tensile strength and ductility than the peak-aged extruded material. These results demonstrate that the formation of {10-12} twins in the extruded AZ80 alloy substantially accelerates the static precipitation of CPs during aging at 300 ℃ and improves the tensile properties of the peak-aged material. 展开更多
关键词 AZ80 alloy {10-12}twin AGING Continuous precipitation Tensile properties
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Microstructure and properties of Al-0.70Fe-0.24Cu alloy conductor prepared by horizontal continuous casting and subsequent continuous extrusion forming 被引量:6
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作者 张晓苑 张辉 +1 位作者 孔祥鑫 傅定发 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第6期1763-1769,共7页
A novel process for manufacturing A1-0.70Fe-0.24Cu alloy conductor was proposed, which includes horizontal continuous casting and subsequent continuous extrusion forming (Conform). The mechanical properties, electri... A novel process for manufacturing A1-0.70Fe-0.24Cu alloy conductor was proposed, which includes horizontal continuous casting and subsequent continuous extrusion forming (Conform). The mechanical properties, electrical conductivity and the compressed creep behaviour of the alloy were studied. The results indicate that the Conform process induces obvious grain refinement, strain-induced precipitation of AI7CuzFe phase and the transformation of crystal orientation distribution. The processed alloy has good comprehensive mechanical properties and electrical conductivity. Moreover, a better creep resistance under the conditions of 90 ~C and 76 MPa is shown compared with pure A1 and annealed copper, and the relationship between primary creep strain and time may comply with the logarithmic law. The enhanced properties are attributed to the grain refinement as well as the fine and homogeneously distributed thermally stable A1Fe and A17Cu2Fe precipitation phases. 展开更多
关键词 A1-0.70Fe-0.24Cu alloy horizontal continuous casting continuous extrusion forming MICROSTRUCTURE property
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Thermal Properties of Crosslinking Modified Ultrahigh Molecular Weight Polyethylene Fibers by Ultra-Violet Irradiation 被引量:8
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作者 于俊荣 陈自力 +1 位作者 杨新戈 刘兆峰 《Journal of China Textile University(English Edition)》 EI CAS 2000年第1期74-76,共3页
By means of ultra-violet(UV)irradiation with photoini-tiator and multifunctional crosslinking agent,thecrosslinking modification of ultrahigh molecular weightpolyethylene(UHMWPE)fibers prepared by gel-spin-ning was ca... By means of ultra-violet(UV)irradiation with photoini-tiator and multifunctional crosslinking agent,thecrosslinking modification of ultrahigh molecular weightpolyethylene(UHMWPE)fibers prepared by gel-spin-ning was carried out.Thermal properties of fiber sampleswere examined using differential scanning calorimetry(DSC),thermomechanical analysis(TMA)apparatusand a manual device.The results indicated that the opti-mal irradiation energy is 250-400 mJ/cm^2,heat-andcreep-resistant behaviors of modified fibers have beenimproved. 展开更多
关键词 UHMWPE fibers THERMAL property ULTRA - vio-let IRRADIATION modification.
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Effect of rare earths on mechanical properties of plasma nitrocarburized surface layer of 17-4PH steel 被引量:7
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作者 刘瑞良 闫牧夫 吴丹蕾 《Journal of Rare Earths》 SCIE EI CAS CSCD 2009年第6期1056-1061,共6页
The aim of this investigation is to reveal the influence of rare earths(RE) addition on mechanical properties of plasma nitrocarburized 17-4PH steel.The nitrocarburized layers were characterized by optical microscope,... The aim of this investigation is to reveal the influence of rare earths(RE) addition on mechanical properties of plasma nitrocarburized 17-4PH steel.The nitrocarburized layers were characterized by optical microscope,scanning electron microscope equipped with energy dispersive X-ray analyzer,X-ray diffractometer,microhardness tester and pin-on-disc tribometer.The results showed that RE atoms could diffuse into the surface layer of 17-4PH steel plasma nitrocarburized at 500 °C for 4 h and did not change the ... 展开更多
关键词 17-4PH steel plasma nitrocarburizing mechanical properties rare earths
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Crystal Structure and Magnetic Property of 2-(Imidazo[1,2-α]pyri-din-2-yl)- 2-oxoacetic Acid and Its Perchlorate
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作者 沈忱 张一曼 雍国平 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2015年第2期240-244,I0002,共6页
We herein report two crystals based on 2-(imidazo[1,2-a]pyridin-2-yl)-2-oxoacetic acid rad- ical and its perchlorate, and investigate the relationship between magnetic properties and crystal stacking structures or s... We herein report two crystals based on 2-(imidazo[1,2-a]pyridin-2-yl)-2-oxoacetic acid rad- ical and its perchlorate, and investigate the relationship between magnetic properties and crystal stacking structures or supramolecular interactions. 2-(imidazo[1,2-a]pyridin-2-yl)- 2-oxoaeetic acid radical in two crystals mainly exist as diamagnetic dimer formed via short atomic contacts or supramolecular interactions (hydrogen bonds, anion-Tr or lone- pair-~r interactions), leading to low magnetic susceptibilities. 2-(imidazo[1,2-a]pyridin-2-yl)- 2-oxoaeetic acid radical crystal exhibits quasi-one-dimensional columnar stacking chain and weak antiferromagnetism. However, its perchlorate crystal possesses one-dimensional double- stranded chain structure assembled through double hydrogen bonds and anion-To interactions, and reveals weak ferromagnetism. 展开更多
关键词 2-(Imidazo[1 2-α]pyridin-2-yl)-2-oxoacetic acid radical Crystallographic struc-ture Magnetic properties Organic compound
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Microstructure evolution and mechanical properties of the Sip/Zn- Al composite joints by ultrasonic-assisted soldering in air 被引量:4
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作者 Kang Yuqing Shen Haoran +7 位作者 Fu Yang Chen Yunru Xu Chang Li Xin Gu Keyun Li Xiaohai An Ledong Wang Qian 《China Welding》 EI CAS 2018年第2期39-44,共6页
Hypereutectic Al -27Si alloys were joined without flux by ultrasonic-assisted soldering at 420 ℃ in air using Zn -5Al the filler alloys, and Si particulate-reinforced Zn - Al based composites filler joints were obtai... Hypereutectic Al -27Si alloys were joined without flux by ultrasonic-assisted soldering at 420 ℃ in air using Zn -5Al the filler alloys, and Si particulate-reinforced Zn - Al based composites filler joints were obtained. The ultrasonic vibration introduced into soldering could influence the migration of Si particles and the microstructure of solidified Zn - Al based alloys. Both the distribution of Si particles and microstructure of the solidified Zn - Al based alloys affected the shear strength of joints. The shear strength increased with the ultrasonic vibration time. The highest average shear strength of joints reached to -68.5 MPa. Transcrystalline rupture mode was observed on the fracture surface. 展开更多
关键词 Hypereutectic Al - Si alloys ultrasonic SOLDERING microstructure mechanical properties
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Structural, mechanical, and electronic properties of 25 kinds of Ⅲ–Ⅴbinary monolayers: A computational study with first-principles calculation 被引量:2
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作者 Xue-Fei Liu Zi-Jiang Luo +5 位作者 Xun Zhou Jie-Min Wei Yi Wang Xiang Guo Bing Lv Zhao Ding 《Chinese Physics B》 SCIE EI CAS CSCD 2019年第8期258-269,共12页
Using first-principle calculations, we investigate the mechanical, structural, and electronic properties and formation energy of 25 kinds of Ⅲ–V binary monolayers in detail. A relative radius of the binary compound ... Using first-principle calculations, we investigate the mechanical, structural, and electronic properties and formation energy of 25 kinds of Ⅲ–V binary monolayers in detail. A relative radius of the binary compound according to the atomic number in the periodic table is defined, and based on the definition, the 25 kinds of Ⅲ–V binary compounds are exactly located at a symmetric position in a symmetric matrix. The mechanical properties and band gaps are found to be very dependent on relative radius, while the effective mass of holes and electrons are found to be less dependent. A linear function between Young’s modulus and formation energy is fitted with a linear relation in this paper. The change regularity of physical properties of B–V(V = P, As, Sb, Bi) and Ⅲ–N(Ⅲ = Al, Ga, In, Tl) are found to be very different from those of other Ⅲ–V binary compounds. 展开更多
关键词 DENSITY FUNCTIONAL theory -Ⅴbinary monolayers BAND structure MECHANICAL properties
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All-optical switching and nonlinear optical properties of HBT in ethanol solution 被引量:3
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作者 郑加金 张桂兰 +2 位作者 郭阳雪 李向平 陈文驹 《Chinese Physics B》 SCIE EI CAS CSCD 2007年第4期1047-1051,共5页
This paper demonstrates an all-optical switching model system comprising a single pulsed pump beam at 355 nm and a CW He-Ne signal beam at 632.8 nm with 2-(2'-hydroxyphenyl)benzothiazole (HBT) in ethanol solution... This paper demonstrates an all-optical switching model system comprising a single pulsed pump beam at 355 nm and a CW He-Ne signal beam at 632.8 nm with 2-(2'-hydroxyphenyl)benzothiazole (HBT) in ethanol solution. The origins of the optical switching effect were discussed. By the study of nonlinear optical properties for HBT in ethanol solvent, this paper verified that the excited-state intramolecular proton transfer (ESIPT) effect of HBT and the thermal effect of solvent worked on quite different time scales and together induced the change of the refractive index of HBT solution, leading to the signal beam deflection. The results indicated that the HBT molecule could be an excellent candidate for high-speed and high-sensitive optical switching devices. 展开更多
关键词 all-optical switching 2-(2'-hydroxyphenyl benzothiazole ESIPT nonlinear optical properties
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Microstructure and mechanical properties of similar and dissimilar metal gas tungsten constricted arc welds:Maraging steel to 13-8 Mo stainless steel 被引量:2
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作者 C.V.S.Murthy A.Gopala Krishna G.M.Reddy 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2019年第1期111-121,共11页
Maraging steel (250) and 13-8 Mo stainless steel plates were joined by gas tungsten constricted arc welding(GTCAW) process in similar and dissimilar metal combinations using 13-8 Mo stainless steel filler wire. The si... Maraging steel (250) and 13-8 Mo stainless steel plates were joined by gas tungsten constricted arc welding(GTCAW) process in similar and dissimilar metal combinations using 13-8 Mo stainless steel filler wire. The similar and dissimilar metal welds made in solutionized condition were subjected to standard post weld hardening treatments direct ageing at 485 ℃, soaking for 31/2 hours followed by air cooling(ageing treatment of maraging steel) and direct ageing at 510 ℃, soaking for 4 h followed by air cooling(ageing treatment of 13-8 Mo stainless steel). The joint characterization studies include microstructure examination, microhardness survey across the weldments and transverse weld tensile test.Similar and dissimilar metal weldments responded to both the post weld ageing treatment. After post weld aging, increase in yield strength, UTS and slight reduction in % elongation of similar and dissimilar metal were observed. The observed tensile properties were correlated with microstructure and hardness distribution across the welds. 展开更多
关键词 Maraging steel(250) 13-8 MO STAINLESS STEEL Mechanical properties Microstructure
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Effect of Run - in Ratios on the Mechanical Properties of Two - Guide Bars Warp - Knitted Fabrics 被引量:1
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作者 陈雨梁 《Journal of China Textile University(English Edition)》 EI CAS 2000年第3期87-89,共3页
Warp knitting technology gets rapid development at present and becomes one of the most important parts of the textiles.But it is less known how the parameters of warp knitting technology affect the mechanical properti... Warp knitting technology gets rapid development at present and becomes one of the most important parts of the textiles.But it is less known how the parameters of warp knitting technology affect the mechanical properties of warp-knitted fabrics.This paper presents discuss a research on the relationships between run-in ratio and mechanical properties of the two-bar warp-knittedfabrics through the measurement and analysis of the mechanical properties of various samples with different run-in ratios.The optimal run一in ratios for the reasonable mechanical properties are obtained from above dis- 展开更多
关键词 RUN - in ratios MECHANICAL property TWO - bar WARP - KNITTED fabric .
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Effects of Zr/Ti molar ratio in SO_4^(2-)/ZrO_(2-)TiO_2 calcined at different temperatures on its surface properties and glucose reactivity in near-critical methanol 被引量:3
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作者 Lincai Peng Junping Zhuang Lu Lin 《Journal of Natural Gas Chemistry》 EI CAS CSCD 2012年第2期138-147,共10页
Effects of Zr/Ti molar ratio in SO42-/ZrO2-TiO2 solid acid catalyst calcined at different temperatures on its surface properties and catalytic activity were thoroughly investigated in this paper. The physicochemical c... Effects of Zr/Ti molar ratio in SO42-/ZrO2-TiO2 solid acid catalyst calcined at different temperatures on its surface properties and catalytic activity were thoroughly investigated in this paper. The physicochemical characteristics of prepared samples were determined by N2 adsorptiondesorption, XRD, NH3-TPD and XPS techniques, respectively. It was found that the crystallization temperature of the samples increased after the combination of ZrO2 and TiO2; and phase transformations from the anatase to the rutile of TiO2 species and the tetragonal to the monoclinic of ZrO2 species were effectively suppressed at higher temperature. The sample with a Zr/Ti molar ratio of 3/1 calcined at 450℃ showed the highest surface area and the most acid sites among all the tested samples. The acid site densities of samples were relatively closed to each other if they were calcined at the same temperature, however, decreased with the calcination temperature. The result indicates that the sulfur content in samples is a crucial factor to control the acid site density. Calcining the sample at 650℃ and higher temperatures resulted in a significant desorption of sulfate ion on the samples. The synthesized samples were evaluated as a potential catalyst for glucose conversion under the near-critical methanol conditions (200℃/4 MPa). The results suggested that the relatively weaker acid sites of the catalyst were more favorable for the accumulation of methyl glucosides, while the moderate acid sites were responsible for the formation of methyl levulinate. The catalytic activity for methyl levulinate production almost increases linearly with the catalyst acid site density. The catalyst deactivation is due to the loss of sulfate ion and the two catalysts with Zr/Ti molar ratios of 3/1 and 1/3 could effectively alleviate the deactivation caused by sulfate solution in the reaction medium and can be reused after calcination with the reuse rate of over 90% in terms of the methyl levulinate selectivity. 展开更多
关键词 SO42-/ZrO2-TiO2 surface properties catalysis glucose reactivity methyl levulinate
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Properties and Microstructure Evolution of Al_2O_3-Si Material Fired in Different Atmospheres 被引量:1
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作者 MA Teng LIU Xinhong +1 位作者 ZHU Xiaoyan YE Fangbao 《China's Refractories》 CAS 2014年第2期30-34,共5页
A1203-Si composite specimens were prepared using fused corundum, ultra-fine α-A1203 and Si powder as starting materials and resin as binder. Effects of sintering atmospheres on properties, phase composition and micro... A1203-Si composite specimens were prepared using fused corundum, ultra-fine α-A1203 and Si powder as starting materials and resin as binder. Effects of sintering atmospheres on properties, phase composition and microstructure of specimens after firing at 1 500 ℃ were investigated. The results show that: ( 1 ) after .firing in oxidizing or weak oxidizing atmosphere, there is some Si in the specimens and some glass phases containing mullite form on specimen surface, the density and strength at room temperature are relatively high, but hot modulus of rupture and thermal shock resistance are relatively poor; (2) after firing in, weak reducing or reducing atmosphere, Si reacts completely with CO or N2forming whisk-phere, Si reacts completely with CO or N2forming whisk-er-like SiC, granular Si2N20 or 0'-SiAION, and the er-like SiC, granular Si2N20 or O'-SiMON, and the thermo-mechanical properties of specimens are enhanced;(3) after firing in nitrogen atmosphere, Si reacts completely with N2, CO or G forming wbisker-like SiC and columnar β-SiA10N crystals, the hot modulus of rupture and thermal shock resistance of specimens are enhanced noticeably. 展开更多
关键词 alumina - silicon material sintering at-mosphere microstructure PROPERTIES
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Comparison of Low Stress Mechanical Properties of Light Weight Wool and Wool Blend Fabrics using the KES-F and FAST Instruments 被引量:1
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作者 王革辉 张渭源 +1 位作者 Postle Ron Phillips David 《Journal of China Textile University(English Edition)》 EI CAS 2000年第4期99-102,共4页
This study compares the test results of the FAST (Fabric Assurance by Simple Testing) with those of the KES - F (Kawabata Evaluation Systems for Fabrics) for a range of nineteen light weight wool and wool blend fabric... This study compares the test results of the FAST (Fabric Assurance by Simple Testing) with those of the KES - F (Kawabata Evaluation Systems for Fabrics) for a range of nineteen light weight wool and wool blend fabrics in terms of the low - stress mechanical properties of bending, shear, and tensile deformation. It is found that there are very significant correlations between the corresponding parameters for extensibility and shear rigidity obtained from the test results of the two systems. The correlation between the values of bending rigidity obtained from the two systems is only moderate. Furthermore, for the fabrics tested in this study, the values of bending rigidity, shear rigidity, and extensibility measured using the KES - F instruments are higher than those of the corresponding parameters measured using the FAST instruments. The linear regression equation is given for each pair of corresponding parameter. 展开更多
关键词 low stress MECHANICAL properties the KES - F SYSTEM the FAST SYSTEM light weight WOOL FABRICS
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Preparation and Electrorheological Property of Y_4O(OH)_9(NO_3)-NH_4NO_3 Materials 被引量:1
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作者 马淑珍 霍莉 +5 位作者 贾云玲 商艳丽 李淑新 许明远 李俊然 张少华 《Journal of Rare Earths》 SCIE EI CAS CSCD 2006年第2期168-171,共4页
The new electrorheologicai (ER) material, a particle material composed of Y4O(OH)9(NO3) and NH4NO3, was obtained. They display better ER performance. The shear stress of the suspension of Y4O (OH)9 (NO3) ( ... The new electrorheologicai (ER) material, a particle material composed of Y4O(OH)9(NO3) and NH4NO3, was obtained. They display better ER performance. The shear stress of the suspension of Y4O (OH)9 (NO3) ( NH4NO3 )2.8 material in dimethyl silicone oil reaches 1469 Pa at an electric field strength (E) of 4.2 kV·mm^-1 and the shear rate (7) of 150 s^-1 The relative shear stress, τ E/τ0( τE and τ0 are the shear stresses at E = 4.2 and 0 kV·mm^-1 respectively), is up to 29, which is 19 times that of pure Y2O3 material. The dielectric and conductive property of the materials play important roles in the modification of the ER effect of the particle materials. The researches on these new ER materials are very useful for obtaining a better understanding on the mechanism of the ER effect and finding an ideal ER material. 展开更多
关键词 electrorheological property Y4O(OH)9(NO3)-(NH4NO3) material dielectric and conductive property rare earths
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A New Cadmium(Ⅱ) Coordination Polymer Extended through Hydrogen Bonds and π-π Stacking Interactions: Synthesis and Photoluminescence Property 被引量:1
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作者 肖国斌 方子涵 姚小强 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2018年第12期1987-1993,1846,共8页
A new coordination polymer, {[Cd(OPY)(tdc)(HO)]·H2 O}n(OPY = 4,4?-(oxybis(4,1-phenylene))dipyridine, H2 tdc = thiophene-2,5-dicarboxylic acid), has been synthesized hydrothermally based on a V-shaped ligand OPY. ... A new coordination polymer, {[Cd(OPY)(tdc)(HO)]·H2 O}n(OPY = 4,4?-(oxybis(4,1-phenylene))dipyridine, H2 tdc = thiophene-2,5-dicarboxylic acid), has been synthesized hydrothermally based on a V-shaped ligand OPY. The structure was fully characterized by elemental analysis, FT-IR spectroscopy, and X-ray single-crystal diffraction analysis. In1, two OPY ligands and one water molecule acted as terminal ligands coordinating to Cdcation to form [Cd(OPY)HO]units, which are then linked by tdc2-ligands to generate a one-dimensional chain. Every two adjacent chains linked by extensive O–H···O hydrogen bonds constitute one-dimensional double-chains, and such chains are extended into two-dimensional layers via O–H···N hydrogen bonds. These layers are further connected to form a three-dimensional supramolecular architecture via π-π stacking interactions. In addition, the thermal stability and solid state fluorescence property of 1 were also investigated. 展开更多
关键词 crystal structure hydrogen bond π-π stacking interaction solid state fluorescence property
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Synthesis,Crystal Structure,and Magnetic Property of One 3D Nickel Coordination Polymer Based on 2-Hydroxy-5-(3',5'-terephthalic acid)Pyridine and 1,4-Bis(1-imdazoly)benzene 被引量:1
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作者 TANG Pei-Qin HAO Lu-Jiang +3 位作者 FAN Li-Ming LIU Xin-Zheng LI Bin ZHANG Xiu-Tang 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2015年第10期1519-1524,共6页
One novel nickel coordination polymer, {[Ni(OTP)(bib)1.5(H2O)]·2H2O}n(1, H2 OTP = 2-hydroxy-5-(3',5'-terephthalic acid) pyridine, bib = 1,4-bis(1-imdazoly)benzene), has been synthesized and characte... One novel nickel coordination polymer, {[Ni(OTP)(bib)1.5(H2O)]·2H2O}n(1, H2 OTP = 2-hydroxy-5-(3',5'-terephthalic acid) pyridine, bib = 1,4-bis(1-imdazoly)benzene), has been synthesized and characterized by elemental analysis(EA), IR, powder X-ray diffraction(PXRD), and thermogravimetric(TG) analyses. The crystal of 1 crystallizes in monoclinic, space group P21/n with a = 12.2860(5), b = 13.8246(6), c = 19.0140(8) A, β = 104.3870(1)°, V = 3128.2(2) A3, Z = 4, C32H28N7 Ni O8, Mr = 697.32, Dc = 1.481 g/cm^3, F(000) = 1444 and μ(Mo Kα) = 0.684 mm-1. The final R = 0.0704 and w R = 0.1764 for 5485 observed reflections with I 2σ(I) and R = 0.1087 and wR = 0.2010 for all data. Topology analysis reveals that complex 1 is a 3D 2-fold interpenetrated {4^4·6^6}-nov net based on the 1D [Ni(OTP)]n chain and the 2D [Ni2(bib)3]n sql sheet. And the variable-temperature magnetic susceptibility measurements exhibit weak antiferromagnetic coupling interaction. 展开更多
关键词 2-hydroxy-5-(3' 5'-terephthalic acid)pyridine 1 4-bis(1-imdazoly)benzene NICKEL topology magnetic property
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Synthesis,Structure,and Surface Photo-electric Properties of a New Zn(Ⅱ)Coordination Complex Constructed from 2-(1H-benzotriazol-1-yl)acetic Acid and 1,10-Phenanthroline Ligands 被引量:2
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作者 李家明 史忠丰 何坤欢 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2016年第1期135-142,共8页
A new binuclear Zn^Ⅱ coordination complex,Zn2(bta)(phen)2(Cl)3(1,Hbta = 2-(1Hbenzotriazol-1-yl)acetic acid and phen = 1,10-phenanthroline),has been synthesized and characterized by single-crystal X-ray diff... A new binuclear Zn^Ⅱ coordination complex,Zn2(bta)(phen)2(Cl)3(1,Hbta = 2-(1Hbenzotriazol-1-yl)acetic acid and phen = 1,10-phenanthroline),has been synthesized and characterized by single-crystal X-ray diffraction,IR spectroscopy,elemental,and photoluminescent analysis.Complex 1 crystallizes in triclinic system,space group P1 with a = 9.3040(19),b = 10.694(2),c =16.841(3) A°,α = 101.18(3),β = 105.77(3),γ = 91.72(3)°,V= 1575.8(5) A°3,C(32)H(22)Zn2Cl3N7O2,Mr =773.66,Dc = 1.631 g/cm^3,Z = 2,F(000) = 780,μ = 1.820 mm^-1,the final R = 0.1238 and wR =0.1131.X-ray diffraction analyses indicate that 1 displays two crystallographic independent Zn^Ⅱmetal centers with a distorted tetragonal pyramidal(ZnN4O) and a tetrahedral(ZnNCl3) geometries,respectively.The phen serves as a common N,N'-bidentate ligand,and the bta^- as a unique N,O-bridged ligand in 1.In the crystal,1 forms a stable 3D supramolecular architecture by trifurcated hydrogen bonding C-H…C1 interactions and C-H…π,π…π stacking.1 showed photo-electric conversion properties. 展开更多
关键词 photo-electric property zinc(Ⅱ) complex 2-(1H-benzotriazol-1-yl)acetic acid synthesis crystal structure
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Kinetic, electronic properties and conductivity studies of ((12Z)N-(5Z)-1-bromo-5-(phenylimino)-1H-pyrrol-2(5H)-ylidene benzenmine {ArN(CNBrCCHCH)NAr} (Ar = C6H5) 被引量:1
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作者 Salem Et. Ashoor Noori Y. Salman 《Journal of Chemistry and Chemical Engineering》 2009年第10期51-56,共6页
Kinetic and conductivity of new Schiff bases compounds such ((12Z)N-(5Z)-1-bromo-5-(phenylimino)-1H- pyrrol-2(5 H)-ylidene)benzenamine {ArN(CNBrCCHCH)NAr} (Ar = C6H5) incorporating the chelating diamino ... Kinetic and conductivity of new Schiff bases compounds such ((12Z)N-(5Z)-1-bromo-5-(phenylimino)-1H- pyrrol-2(5 H)-ylidene)benzenamine {ArN(CNBrCCHCH)NAr} (Ar = C6H5) incorporating the chelating diamino has been studied in this paper and was found a second order of this reaction. Electronic Properties using hyperchem program study has been improved for this compound such angel and bond distance, and then this compound was defining as electric conductivity and did prove to be useful for conduclively compound. 展开更多
关键词 Schiff bases compounds ((12Z)N-(5Z)-1-bromo-5-(phenylimino)- 1H-pyrrol-2(5H)-ylide ne)benzenamine chelating diamino: electronic properties
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Simulation Model of Mechanical Properties of Point - Bonded Nonwovens
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作者 李作攀 储才元 《Journal of China Textile University(English Edition)》 EI CAS 1999年第2期43-45,共3页
A computer model for studying the mechanical properties of point - bonded nonwovens is established. The simulation tensile curve of a nonwoven fabric may be obtained based on relaxation procedure when the mechanical p... A computer model for studying the mechanical properties of point - bonded nonwovens is established. The simulation tensile curve of a nonwoven fabric may be obtained based on relaxation procedure when the mechanical properties of fibers, the arrangement of bond points in the fibrous web and specimen size are inputted into the computer. Relaxation method and relevant algorithms of computer simulation are described in detail. The validity of the model is also demonstrated. 展开更多
关键词 Computer SIMULATION POINT - BOND Non-wovem MECHANICAL Properties
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Syntheses, Structures and Properties of Three Novel La(Ⅲ)/Co(Ⅱ) Coordination Polymers Based on 5-(3-(Tetrazo-5-yl)phenyl)isophthalic Acid
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作者 ZHAI Li-Jun GAO Ling-Ling +3 位作者 ZHANG Jie JIA Jiao-Jiao NIU Yu-Lan HU Tuo-Ping 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2019年第7期1207-1215,共9页
Three novel complexes, namely {[La(tapipa)(4,4′-bibp)·(H2O)2]·H2O}n(1),{[La-(tapipa)(H2O)4(OH)]·3 H2O}n(2),[Co(tapipa)(1,4-bbib)]n(3)(tapipa = 5-(3-(tetrazo-5-yl)phenyl)isophthalic acid, 4,4′-bibp = ... Three novel complexes, namely {[La(tapipa)(4,4′-bibp)·(H2O)2]·H2O}n(1),{[La-(tapipa)(H2O)4(OH)]·3 H2O}n(2),[Co(tapipa)(1,4-bbib)]n(3)(tapipa = 5-(3-(tetrazo-5-yl)phenyl)isophthalic acid, 4,4′-bibp = 4,4′-bis(imidazolyl)biphenyl, and 1,4-bbib = 1,4-bis(benzimidazo-1-ly)benzene) have been synthesized under solvothermal conditions and characterized by PXRD, IR,TGA, and so on. Complex 1 presents a 2 D layer structure, which is finally packed into a 3 D supramolecular structure by means of hydrogen bonds;complexes 2 and 3 exhibit 1 D chains and 2 D wavy-type structures, respectively, which are expanded into 3 D supramolecular structures through hydrogen bonds and π-π interactions. Furthermore, the luminescence properties of complex 1 and the variable-temperature magnetic susceptibilities of 3 were investigated. Complex 1 has highly selective sensing for Fe^3+ and Cr2O7^2- ions. 展开更多
关键词 5-(3-(tetrazo-5-yl)phenyl)isophthalic ACID LUMINESCENT PROPERTIES magnetic PROPERTIES
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