6 optical and mechanical properties of fibers
Optical and mechanical properties of cu al o thin films prepared by plasma enhance CVD
... the mechanical properties of TCO films and most of them were focused on n-type TCOs Report on mechanical properties of p-type TCOs is rare, if any In particular, no report on the mechanical properties ... 66 References 67 Mechanical Properties of Copper Aluminium Oxide Thin Films 69 5.1 Introduction 69 5.2 Typical Mechanical ... on Cu-Al-O Sections 2.3 and 2.4 introduce the contemporary research on the optical and mechanical properties of TCO materials Since reports on both of the properties of Cu-Al-O are rare, the...
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Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 6 pps
... achieved where diffusive flux of the carriers is balanced by the drift flux 3.225 © E Fitzgerald-1999 12 Joining p and n p n Ec EF Ev Carriers flow under driving force of diffusion until EF is flat ... Qualitative Effect of Bias • • • Applying a potential to the ends of a diode does NOT increase current through drift The applied voltage upsets the steady-state balance between drift and diffusion, ... Note that dopants move the fermi energy from mid-gap towards either the valence band edge (p-type) or the conduction band edge (n-type) n-type material in equilibrium p-type material in equilibrium...
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Processing and mechanical properties of pure mg and in situ aln reinforced mg 5al composite 6
... stress levels of 40, 60 , 80, 100, 120 and 130 MPa with dwelling time of hours 6. 3 Results and discussion 6. 3.1 Creep behaviors Table 6. 1 Creep strain rate (s-1) at various applied stresses and temperatures ... as a function of effective applied stress at room temperature as illustrated in Fig 6. 6, where d, dp and c are taken to be 33 nm, 274 nm and 0 .6 [47] respectively As shown in Fig 6. 6, the critical ... model of grain boundary diffusion controlled creep model (equation 6. 4) and GBS model (equation 6. 6) Similar results were reported for the creep behavior of nanostructured Mg alloys [30] and nanocrystalline...
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Tài liệu PHYSICAL, CHEMICAL, AND MECHANICAL PROPERTIES OF BAMBOO AND ITS UTILIZATION POTENTIAL FOR FIBERBOARD MANUFACTURING docx
... α-cellulose % % 68 .92 70.84 71.95 68 .58 72 .69 73.82 69 .94 72.50 73 .65 63 .14 69 .94 65 .84 46. 52 47.30 47.51 46. 21 46. 82 46. 99 46. 08 47 .65 47.91 41.71 49.02 45.08 64 .54 42.84 The bottom portion of three ... 0. 76 Longitudinal Ec (MPa) fc (MPa) 47.0 (2.4) 2 067 (339) 50.9 (3.1) 27 76 ( 362 ) 55.7 (3.8) 365 8 ( 464 ) 86. 8 (1.8) 44 26 (491) 83.9 (2.8) 4428 (305) 84.0 (3.3) 466 0 (451) 93 .6 (3 .6) 48 96 (1 16) 86. 6 ... 0.41 0 .62 0.59 0.72 0.70 0 .66 0 .62 0.78 0.73 0. 76 0.75 0.71 0 .66 0.84 0.79 300 250 200 150 100 50 0.30 115 .6 95.1 82.1 63 .7 139.5 121 .6 8 460 8173 7177 567 4 12031 9313 154.4 1 46. 2 118.1 110 .6 210.1...
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FINGERPRINTS IN THE OPTICAL AND TRANSPORT PROPERTIES OF QUANTUM DOTS ppt
... (FWHM) of the autocorrelation function, , and is the FWHM of the power spectrum 6 Fingerprints in the Optical and Transport Properties of Quantum Dots Axial resolution (m) 20 15 830nm 1 064 nm ... its corresponding 3dB bandwidth [Fig 16( b)] Broadband spectrum with 3dB bandwidth of 128nm was measured at injection current of 60 0mA Above this drive current, the bandwidth of the power spectrum ... Schmidt O G (20 06) Structural and optical properties of In(Ga)As/GaAs quantun dots treated by partial capping and annealing Journal of Applied Physics, Vol.100, pp. 064 313_1- 064 313_4 Wang Z.C.,...
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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
... Residue Weight (%) phr (ENR 50) 302 .63 391.29 5.42 phr (SMR L) 298.99 3 86. 77 5.08 phr (ENR 50) 309. 86 389 .63 6. 93 phr (SMR L) 308.97 387.50 6. 60 phr (ENR 50) 329. 76 398 .67 10.51 phr (SMR L) 323.41 392.50 ... 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 ... Figures and show the effect of organoclay loading on stress at 100% elongation (M100) and stress at 300% elongation (M300) of NR and ENR nanocomposites For both NR and ENR nanocomposites, M100 and...
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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
... ) ×1 06 m2 s−2 T O T/O 30408 252 06 21958 28409 25589 260 39 25152 31378 269 04 22005 3 267 1 17 561 172 86 22 267 21149 21830 20421 33 467 232 76 18005 0.93 1.44 1.27 1.28 1.21 1.19 1.23 0.94 1. 16 1.22 ... * * * T 2.89 3.53 2. 96 3.27 2.51 2. 76 1 .62 2 .62 3.73 2.33 * * * * * Crushing strength in flexion (MPa) T O T/O 61 128 90 102 166 1 26 103 41 48 97 76 117 91 93 159 117 111 60 50 74 TS/RS O T/O ... 87.7 82.7 140.0 1248 22 56 2544 2150 1440 1843 12 96 1930 17 76 1 162 528 538 3 36 3 46 528 3 46 518 5 76 374 317 higher compressive strength For tension wood, things are less known, and seem more diverse,...
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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
... Modulus of elasticity (N/mm ) Beaupré Hazendans Hoogvorst Height 0.7 m 67 32 65 69 5314 aab 6. 6 m 8100 7954 65 77 aab 11.0 m Volume weighted average 8802 9033 769 2 aab 7857 7783 65 10 aab Standard ... 280 – Minimum 60 52 61 50 4851 – Maximum 9472 9450 79 16 – (c) Modulus of rupture (N/mm2 ) Beaupré Hazendans Hoogvorst Duncan ranking Height 0.7 m 53 60 62 abb 6. 6 m 63 71 75 abb 70 78 86 abc Volume ... 42.3 0.0 19.8 19.8 62 .1 Hoogvorst 41.0 4.3 45.3 0.0 15 .6 15 .6 60.9 End-use related properties of poplar wood 62 7 Table VI Density (kg/m3 ), modulus of elasticity and modulus of rupture (N/mm2...
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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
... (MPa) 76 76 76 76 76 76 74 66 73 68 Mean 0.44 0.53 4.77 6. 35 1.35 11. 26 10 101 94 48.8 13 .6 Standard deviation 0.03 0.04 0 .69 0.84 0. 16 1. 16 439 13 5.2 1.7 Variation Coefficient (%) 6. 28 6. 80 14.47 ... mean mass loss of 10% and a durability index of 0 .61 (class 4, slightly durable), as for previous fungus, while heartwood had a mass loss of 1.1% and a durability index of 0. 06 (class 1, very ... 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...
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Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 1 doc
... 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
... For Si, Eg=1.1eV, and let µe and µh be approximately equal at 1000cm2/V-sec (very good Si!) σ~1010cm-3*1 .60 2x10-19*1000cm2/V-sec=1.6x10 -6 S/m, or a resistivity ρ of about 1 06 ohm-m max • • One ... 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 ... into the conduction band or valence band by using a modified expression for the energy of an electron in the H atom • En = e2 • • • me 13 .6 =− 2 n 8ε o h n (in eV) =e me m *e 13 .6 m* En = 2 ε...
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Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 10 pps
... 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 ... time / h Temp: 360 C, H2, CO, NH3 (10, 50 and 100 ppm), NO2 (0.2, 0.4, and ppm) [ Pfad: \ alpha missy Messungen messplatz_1 ] 3.225 M Jägle / 27.02.2001 © H.L Tuller-2001 11 MicroElectroMechanical ... (1 µm) • Substrate: Si wafer 20 40 60 80 110 100 90 80 70 60 50 40 30 20 10 -10 110 100 90 80 70 60 50 40 30 20 10 -10 20 MFC2 Feuchte Temp CO 40 NO2 NO2kl 60 NH3 H2 Pt-100 resistance / Ω • Electrode:...
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Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 9 pps
... Traditionally admired for their stability • Mechanical • Chemical • Thermal • Exhibit other key functional properties • Electrical, Electrochemical, Electromechanical • Optical • Magnetic 3.225 20 10 Electroceramics ... Sputtered SnO2 film (60 nm) (Fraunhofer Institute of Physical Measurement Techniques) • Target gases: Electrical Measurement H2, CO, NH3, NO2 , CH4 • Operating temperature: 320 - 460 ºC Pt electrode ... (Najafi and Hetke, IEEE Trans Biomed Eng 37, 474 (1990).) 3.225 28 14 Measurement of Gas Sensor Performance • Gas sensing materials: Sputtered ZnO film (150 nm (Massachusetts Institute of Technology)...
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Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 3 pot
... , z )ψ = − i ∂t 2m ψ and ∆ ψ must be finite, continuous and single valued ψψ * real with ψψ *dV = probability of finding particle in volume dV Average or expectation value of variable α = ∫ ψ ... *α op ψ dV v 3.225 © H.L Tuller-2001 19 Time and Spatial Dependence of ψ Assume ψ (x,y,z,t) separable into ψ(x,y,z) and φ(t) Applying separation of variables: − h ∇ 2ψ h ∂φ +V = − =ε 2m ψ i φ ... determined by the crystal structure and valence n determines the energy and velocity of the highest occupied electron state at T=0 3.225 © E Fitzgerald-1999 Representation of E,k for 2-D Material E= h...
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Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 8 pdf
... of a chromium atom (A) and a trivalent chromium ion (B) 3.225 © H.L Tuller, 2001 10 Octahedral Environment of Transition Metal Ion Interaction of the d orbitals of a central ion with six ligands ... Fitzgerald-1999 Characteristics of Optical Fiber 3.225 Colors Produced by Chromium Above: alexandrite, emerald, and ruby Center: carbonate, chloride, oxide Below: potassium chromate and ammonium dichromate ... The splitting of the five 3d orbitals in a tetrahedral and an octahedral ligand field Note: When the element is a mid-gap dopant, transitions within this element lead to absorption and/ or emission...
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Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 4 pps
... the valence band to the conduction band E Ec near band gap E=hν k Creates a ‘hole’ in the valence band Ev near band gap 3.225 © E Fitzgerald-1999 Holes and Electrons • • Instead of tracking electrons ... 1,000,000 Remember that: 3.225 µ= eτ m* and 1 ∂2E = m * h ∂k 2 Metals and Insulators • EF in mid-band area: free e-, metallic • EF near band edge – EF in or near kT of band edge: semimetal – EF in gap: ... 1.1 / 5.42 / 5. 46 1231 / 1510 / ? 0.72 / 1.35/ ? 5 .66 / 5 .65 / ? 508 / 798 / ? 0.08 /0.18 / 1.45 6. 45 / 6. 09 / ? MP (°K) ∗ Fill in as many of the question marks as you can Note Trends: As descend...
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Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 11 potx
... since energy ~ LI and for loop L = ΦB I Φ B = ∫ ∫ H ⋅ dS ~ HA ∴ µH = Φ B I = HAI and ∴ µ = IA e ω A = πr c 2π e µ = − ωr 2c I =− 3.225 © E Fitzgerald-1999 Microscopic Source of Magnetization • ... Fe, Ni, Co -> J positive! Other elements J is negative Rule of Thumb: interatomic distance r ≡ > 2ra 2(atomic radius) J is a function of distance! 3.225 © E Fitzgerald-1999 Ferromagnetism M M (T ... reversible boundary displacement ‘normal’ paramagnet TC Hc H T Easy induction, “softer” Magentic anisotropy hardness of loop dependent on crystal direction comes from spin interacting with bonding...
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Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 2 pot
... metals look like free-electron Drude metals • Valence=2 and 3, magnitude and sign suggest problems 3.225 © E.A Fitzgerald-1999 25 13 Response of Free e- to AC Electric Fields • Microscopic picture ... 3.225 © E.A Fitzgerald-1999 Complex Representation of Waves sin(kx-ωt), cos(kx-ωt), and e-i(kx-ωt) are all waves e -i(kx-ωt) is the complex one and is the most general imaginary A θ Acosθ iAsinθ ... Response of e- to AC Electric Fields • Momentum represented in the complex plane imaginary p (ω>>1/τ) p p (ω
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Materials Science and Engineering - Electronic and Mechanical Properties of Materials Part 7 pptx
... c k optical → k n εr 3.225 So polarization slows down the velocity of the wave in the material © E Fitzgerald-1999 Compare Optical (index of refraction) and Electrical Measurements of ε ... Measurements of ε Material Optical, n2 Electrical, ε diamond 5 .66 5 .68 Only electronic polarization NaCl 2.25 5.9 Electronic and ionic polarisation H2O 1.77 80.4 Electronic, ionic, and molecular polarisation ... is the dielectric or electric susceptibility All detail of material response is in εr and therefore P 3.225 © E Fitzgerald-1999 Origin of Polarization • • • We are interested in the true dipoles...
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Magneto transport, magneto optical and dynamic properties of ferromagnetic nanostructures
... Crystals 1 16 6.1 Introduction 1 16 6.2 Modulated Ni80Fe20 Film 1 16 6.2.1 Experimental Details 117 6. 2.2 Ni80Fe20 Film on Top of Periodic Arrays of Co/Pd Dots 120 6. 2.3 Ni80Fe20 Film on Top of Periodic ... Schematic 62 4.4.2.2 Experimental Verification 64 4.5 Magnetic Properties of [Co/Pd]4/Au/[Co/Pd]2 Rings 66 4.5.1 Structure Analysis of [Co/Pd]4/Au/[Co/Pd]2 Films 67 4.5.2 Effects of Interlayer ... function of n 56 Fig 4 .6 (a) Hysteresis loops of pre-patterned [Co(0.5 nm)/Pd(3 nm)]12 structures as a function of d (A plot of Hs1 and Hs2 as a function of d is shown as an inset); and (b) MFM...
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