sintering of ternary copper alloys powder metalurgy electrical and mechanical properties eff
Báo cáo hóa học: " Effects of silver impurity on the structural, electrical, and optical properties of ZnO nanowires" doc
Ngày tải lên :
20/06/2014, 22:20
... longer than that of Zn-O [35,36] In the case of 3SZO and 5SZO NWs, the surface of the SZO NWs is crumpled because of the stress by doping effect [37] Finally, we observed two kinds of effects, when ... structure because of both low Ea and optimized quantity of substitution function of Ag+ [19] However, stress of lattices structure on both 3SZO and 5SZO NWs is very impressive because a lot of Ag interstitials ... Programs” of the Ministry of Education, Science and Technology, Korea Author details Electronic Materials Center, Korea Institute of Science and Technology, Seoul 136-791, Korea 2Department of Electrical...
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Báo cáo hóa học: " Impacts of Post-metallisation Processes on the Electrical and Photovoltaic Properties of Si Quantum Dot Solar Cells" potx
Ngày tải lên :
21/06/2014, 07:20
... detrimental effect However, this effect is very small as Rsh of the cell is in the order of MX.cm2 The short circuit current increases by a factor of three due to the decrease of Rs Contact and Sheet ... Other possible solutions include reduction of the barrier height and thickness of the quantum mechanical tunnelling barrier, modification of the composition of the cell’s absorber material, improved ... electronic band gap of the nanostructured material is enhanced due to the quantum confinement effect At present, the emphasis is on increasing Voc and the devices are very unoptimised for absorption and...
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Báo cáo hóa học: "Investigation of electrical and magnetic properties of ferro-nanofluid on transformers" pptx
Ngày tải lên :
21/06/2014, 04:20
... magnetized curve of the Fe O nanofluid measured by a VSM Results and discussion Different magnetic cores, air, and Fe3O4 nanofluids of 0.25, 0.5, 0.75, and M were applied as the magnetic core of transformers ... with the increase of Fe3O concentration, and it increases as a function of frequency At 100 MHz, the resistances with the magnetic core of 0.25 and M Fe O nanofluids were two and five times the ... area of solenoid, and l is the length of solenoid, μ” is the real part of complex permeability, and μ” is the imaginary part of complex permeability It can be observed that the imaginary part of...
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Báo cáo hóa học: " Effect of Composition on Electrical and Optical Properties of Thin Films of Amorphous GaxSe1002x Nanorods" pptx
Ngày tải lên :
21/06/2014, 17:20
... well-established knowledge of the electrical and optical properties of GaSe thin films, in this paper, we report the results on electrical and optical measurements of amorphous thin films of GaSe nanorods ... field of micro/optoelectronics Significant research efforts have been focused to the study of the electrical and optical properties of this compound in thin film formation Since the optimization of ... frequency doubling and fast optical gating [11] and behaves as an X-ray detector [12] Electronic and optoelectronic properties of GaSe, GaS, and InSe materials indicate the possibilities of realizing...
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Báo cáo hóa học: " Influence of Surface Modified MWCNTs on the Mechanical, Electrical and Thermal Properties of Polyimide Nanocomposites" ppt
Ngày tải lên :
22/06/2014, 01:20
... MWCNT in case of former and with wt% in case of the latter Electrical Properties Fig SEM images of a raw, b acid modified-MWCNTs and c amide-MWCNTs As in the case of TS, the YM of the amide-MWCNTs/ ... duration and prolonged use between 200 and 350 °C without much deterioration in mechanical and other properties Polyimides are produced by the condensation reaction of an aromatic dianhydride and ... because of their large aspect ratio and mobile p electrons Addition of very small quantities of MWCNTs significantly increases the conductivity of the composite as observed in Fig As in the case of mechanical...
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Unique glass formation and mechanical properties of zr cu based alloys
Ngày tải lên :
14/09/2015, 14:11
... Stress gradient in early stage 88 4.4.3 Shear band initiation and proliferation 91 4.4.4 Curved Shear band path and interaction of shear bands 97 4.4.5 Application of stress gradient strategy in a brittle BMG ... formation and mechanical behavior of BMGs were reviewed in detail, followed by the objective and outline of the present study. In Chapter 2, the discovery of a new group of glass ... Summary of the measured mechanical properties of orthogonal Zr51Cu49, Zr48Cu45Al7 and (Zr48Cu45Al7)98Y2 BMG specimens under compression testing 64 Table 3. 2 Summary of the Weibull moduli for various materials...
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Tài liệu PHYSICAL, CHEMICAL, AND MECHANICAL PROPERTIES OF BAMBOO AND ITS UTILIZATION POTENTIAL FOR FIBERBOARD MANUFACTURING docx
Ngày tải lên :
22/02/2014, 09:20
... utilization The physical and mechanical properties of bamboo vary with the age of the bamboo and the height of the culm [Chauhan 2000] In general, SG and the properties of bamboo drop from the ... internal bond (IB) properties of the panels and compare the age effect on the physical and mechanical properties of the fiberboard 1.3 References Abd.Latif, M., W.A W Tarmeze, and A Fauzidah 1990 ... characteristics and mechanical properties of bamboo Dissertation, Chinese Academy of Forestry, Beijing, China pp 147 Yusoff, M.N.M, A Abd.Kadir, and A.H Mohamed 1992 Utilization of bamboo for pulp and paper...
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báo cáo hóa học:" Women''''s quality of life is decreased by acute cystitis and antibiotic adverse effects associated with treatment" pptx
Ngày tải lên :
20/06/2014, 15:20
... and 25 (27%) of the effects, respectively Headache (12% of patients) and other central nervous system effects such as dizziness (5%) were the next most common side effects The remaining 12% of ... ciprofloxacin and nitrofurantoin, respectively Clinical outcomes Clinical cure rates did not differ by treatment with 88, 82 and 87% of patients treated with TMP/SMX, ciprofloxacin and nitrofurantoin, ... 2) Of all organisms isolated, resistance to TMP/SMZ, ciprofloxacin and nitrofurantoin were 7%, 1% and 8%, respectively For E coli the resistance rates were 7%, 0% and 4% for TMP/SMX, ciprofloxacin...
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Báo cáo hóa học: " Effect of the Nd content on the structural and photoluminescence properties of silicon-rich silicon dioxide thin film" pdf
Ngày tải lên :
21/06/2014, 05:20
... effect of Si-np towards Nd3+ ions The evolution of the integrated PL intensity of the Sinp PL band and the 920-nm PL peak is shown in the inset of Figure The enhancement of the PL intensity of the ... coupling between Si-np and Nd 3+ ions, and, accordingly, the potential of sensitizing of Si-np The increase of the PL intensity of Nd 3+ is then explained by the increase of the Si-np density as ... increase of the LO3 band intensity (see Figure 2b) is related to the increase of the number of Si-OSi bonds at the SiO x /Si-np interface [19,20], i.e., the increase of the density of Si-np [21]...
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Báo cáo hóa học: " Ab Initio Prediction of Boron Compounds Arising from Borozene: Structural and Electronic Properties" ppt
Ngày tải lên :
22/06/2014, 00:20
... (black line) and B24 (red line) Below Density of states and HOMO (in the inset) for Coronene 161 Table Energies and percentual contributes of pz orbitals to the composition of HOMO, LUMO and their ... generalized gradient approximation (GGA), in terms of structural and electronic properties of two boron compounds, B60H12 and B228H24, in which the molecule of borozene can be considered as the building ... basis of stability for boron planar clusters Szwacki et al [15] have discussed about the regions of aromaticity of borozene and since this molecule can be indicated as the embryo of B6 and B24,...
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Báo cáo hóa học: "Influence of Rare Earth Doping on the Structural and Catalytic Properties of Nanostructured Tin Oxide" docx
Ngày tải lên :
22/06/2014, 01:20
... Conversion/Selectivity (%) ð1Þ The effects of the process of segregation and de-mixing of these rare earths on the SnO2 catalytic properties were studied and compared In spite of the relatively low specific ... also by acidic sites of the oxide catalysts Thus, it may be suggested that the control of surfaces and modifications of the nanostructures of the tin oxide particles, undoped and doped with rare ... additives), or nucleate a second phase Previous studies have evaluated the effect of different dopants on the morphology and properties of tin oxide Rare earth cations have, as yet, been little explored...
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Báo cáo vật lý: "Effect of Blowing Agent Concentration on Cell Morphology and Impact Properties of Natural Rubber Foam" ppt
Ngày tải lên :
07/08/2014, 14:20
... (2008) Effect of foaming temperature and rubber grades on properties of natural rubber foams J Appl Poly Sci., 107, 2531–2538 Guriya, K.C & Tripathy, D.K (1996) Morphology and physical properties of ... Design properties of structural foam J Cell Plast., 8, 245–249 Zakaria, Z., Ariff, Z.M., Tay, L.H & Sipaut, C.S (2007) Effect of foaming temperature on morphology and compressive properties of ethylene-propylene-diene ... Choi, K.C., Yoon, J.M & Kim, S.Y (2007) Effects of foaming temperature and carbon black content on the cure characteristics and mechanical properties of natural rubber foams J Ind Eng Chem.,...
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Báo cáo vật lý: "Comparison of the Effects of Organoclay Loading on the Curing and Mechanical Properties of Organoclay-Filled Epoxidised Natural Rubber Nanocomposites and Organoclay-Filled Natural Rubber Nanocomposites" pot
Ngày tải lên :
07/08/2014, 14:20
... process of ENR, which results in the higher values of the minimum and maximum torques 3.2 Mechanical Properties Figure and Table show the effect of organoclay loading on the tensile strength of organoclay-filled ... Figure 4: The effect of organoclay loading on tensile strength of NR and nanocomposites ENR Figures and show the effect of organoclay loading on stress at 100% elongation (M100) and stress at ... Figure 3: The effect of organoclay loading on maximum torque of NR and ENR nanocomposites Comparing the NR nanocomposites and ENR nanocomposites, the minimum torque and maximum torque of ENR nanocomposites...
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Báo cáo lâm nghiệp: "Comparison of physical and mechanical properties of tension and opposite wood from ten tropical rainforest trees from different species" pptx
Ngày tải lên :
07/08/2014, 16:21
... gymnosperms and physical -mechanical models of wood behaviour, a low value for MFA should result in (i) a high value of specific modulus of elasticity, (ii) a higher value of tangential and radial shrinkage, ... poplar trees, Ann For Sci 60 (2003) 371–378 [17] Coutand C., Jeronimidis G., Chanson B., Loup C., Comparison of mechanical properties of tension and opposite wood in Populus, Wood Sci Technol 38 ... Wood properties from tropical species 505 Figure Localization of specimen (disk and rods) used for the experiments 2.5 Air dry longitudinal modulus of elasticity The longitudinal modulus of elasticity...
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Báo cáo lâm nghiệp: "End-use related physical and mechanical properties of selected fast-growing poplar hybrids (Populus trichocarpa × P. deltoides)" potx
Ngày tải lên :
07/08/2014, 16:21
... increasing height, following the trend of increasing density 3.4 Veneer quality – Density and mechanical properties of plywood Figure gives an overview of the efficiency of the veneer processing as well ... clone Table VI gives an overview of the density, modulus of elasticity and modulus of rupture for each clone Both mechanical properties were tested perpendicular and parallel to the grain as described ... related properties of poplar wood 627 Table VI Density (kg/m3 ), modulus of elasticity and modulus of rupture (N/mm2 ) for a 7-layer plywood for each of the selected clones Beaupré Density of the...
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Báo cáo khoa học: "Natural durability, physical and mechanical properties of Atlas cedar (Cedrus atlantica Manetti) wood from Southern Italy" ppsx
Ngày tải lên :
08/08/2014, 14:20
... principles of testing and classification of the natural durability of wood [10] ISO 3131, Wood – Determination of density for physical and mechanical tests [11] ISO 3133, Wood – Determination of ultimate ... uniform The results of physical and mechanical characterisation of Atlas cedar wood from Southern Italy are summarised on table IV Table V refers about physical and mechanical properties found on ... projects toward the improvement of the silvicultural management of existent stands and of the knowledge of that wood, in order to find its best end use DISTRIBUTION AND ECOLOGICAL CHARACTERS The...
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Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 1 doc
Ngày tải lên :
11/08/2014, 14:20
... Conductivity of Metals? • Drude model: Sea of electrons – all electrons are bound to ion atom cores except valence electrons – ignore cores – electron gas Schematic model of a crystal of sodium ... R=V/I; σ=E/j=neµ) Ohms/square ⇒ Note, if L=W, then R= ρ /t independent of magnitude of L and W Useful for working with films of thickness, t R R R 3.225 © H.L Tuller-2001 17 How to Make Resistance ... from electric force on electron! 3.225 © E.A Fitzgerald-1999 Equation of Motion - Impact of Collisions Assume: • probability of collision in time dt = dt/τ • time varying field F(t) v(t+dt) = (1-...
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Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 5 ppt
Ngày tải lên :
11/08/2014, 14:20
... Fermi level is approximately in the middle of the band gap • The law of mass action describes the electron and hole populations, since the total number of electron states is fixed in the system ... E F = m* * + kbT ln h me Eg Since me* and mh* are close and in the ln term, the Fermi level sits about in the center of the band gap ( ) − Eg k T 2 * * p or n = ni = 2 b me ... the barrier NCNV is the density of the reactants, and n and p are the products N C NV → e′ + h • Eg − Eg n np =ekT = i N C NV N C NV b • • • Thus, a method of changing the electron or hole...
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Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 10 pps
Ngày tải lên :
11/08/2014, 14:20
... capable of sensing a change in environment and responding without need for a microprocessor A device has both gas sensing and actuating function by integration of semiconducting oxide and piezoelectric ... Micromachining - Application of microfabrication tools, e.g lithography, thin film deposition, etching (dry, wet), bonding 3.225 © H.L Tuller-2001 12 Gas Sensors and MEMS • Miniaturization • ... control down to 0.1 mm through the use of highly selective p-n junction etch-stops • fabrication of structures with negligible internal stresses • fabrication of structures not constrained by specific...
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