electrical properties of insulatlng materials

... a series of captors), and are thus much noisier 250 Static properties of granular materials F r p h z Fig 14.13 Sketch of the experimental set-up of Reydellet et al for the measure of the pressure ... contact with 246 Static properties of granular materials typically hundreds of grains We start with a review of such experiments performed in different situations (geometry of the pile, the silo ... probably one of the issues that has been at the origin of the interest of many physicists for granular materials [359] The last point of this subsection will be dedicated to the study of the stress...

Ngày tải lên: 01/11/2013, 08:20

... and 2.8(f) These may be thought of as the absence of a plane of atoms (intrinsic stacking faults) or the insertion of rows of atoms that disturb the arrangement of atoms (extrinsic stacking faults) ... time-dependent flow of materials at temperatures greater than $0.3–0.5 of the melting temperature in degrees Kelvin Also, the activation energy, Q, in Eq (2.10) is indicative of the actual mechanism of diffusion, ... approximately 0.3–0.5 of the melting temperature in degrees Kelvin Since the evolution of microstructure is often controlled by diffusion processes, a brief introduction to elementary aspects of diffusion...

Ngày tải lên: 23/12/2013, 00:15

... mechanical properties of materials It is not intended to be a comprehensive review of all the different aspects of mechanical properties; such a task would be beyond the capabilities of any single ... classes of materials Following a brief introduction to materials science and basic strength of materials, the fundamentals of elasticity and plasticity are presented, prior to a discussion of strengthening ... macroscopic level of understanding of structure [Figs 16(a)–(d)] They are often unaware of the atomic and microstructural constituents that can affect the mechanical behavior of materials and of the role...

Ngày tải lên: 23/12/2013, 00:15

... Electricity, charge carriers and electrical properties of cells • The cells of the body are composed of matter Matter itself is composed of atoms, which are mixtures of negatively charged electrons, ... formation of an electrical field they will resonate differently from normal cells • The electrical conductivity of a tissue depends on both the physico-chemical bulk properties, i.e., properties of ... the electrical functions of the ECM Therefore the composition and degree of toxicity of the ECM-glycocalyx interface will affect the electrical field and the flow of biocurrents in the ECM The electrical...

Ngày tải lên: 14/02/2014, 22:20

... the role of electrical properties of the plasma membrane in the subcellular distribution of K-Ras In particular, we investigated (a) the role of surface charge on inner and outer leaflet of plasma ... lipids Electrical properties of the outer leaflet of plasma membrane ) contribution to membrane targeting of K-Ras Biochemical studies as above demonstrate that membrane binding properties of K-Ras ... whether the effect of poly l-lysine on membrane binding of K-Ras depends on its electrical properties, we performed similar experiments in the presence of increasing concentrations of NaCl (Fig 3Aii)...

Ngày tải lên: 19/02/2014, 00:20

... mechanical properties of materials It is not intended to be a comprehensive review of all the different aspects of mechanical properties; such a task would be beyond the capabilities of any single ... classes of materials Following a brief introduction to materials science and basic strength of materials, the fundamentals of elasticity and plasticity are presented, prior to a discussion of strengthening ... macroscopic level of understanding of structure [Figs 16(a)–(d)] They are often unaware of the atomic and microstructural constituents that can affect the mechanical behavior of materials and of the role...

Ngày tải lên: 14/03/2014, 17:44

... the masonry in tension, mechanism of opening and closing of cracks under cyclic load, transfer of shear stresses, anisotropic properties of strength and stiffness of masonry in horizontal and vertical ... simulation of sliding and shear failure of the joint The adopted model of shear strength capacity of the joint is given in Fig 18 The modelling of shear failure is similar to that of the masonry, ... The effect of geometrical parameters and material properties of face sheets and core are studied on the face wrinkling of sandwich plates Comparison of the present results with those of plate theories...

Ngày tải lên: 16/03/2014, 22:20

... novel properties [11] Keeping this incentive in mind, the purpose of this paper is to provide an overview of the basic understanding of the mechanical properties of these materials A number of techniques ... Examples of this family are semicrystalline polymers or nanomaterials made up of equiaxed nanometer-sized crystals, e.g., of Cu Nanomaterials belonging to the second family consist of crystallites ... A great deal of the early work on mechanical properties of nanocrystalline materials used the inert gas condensation technique One shortcoming is the possibility of contamination of powders and...

Ngày tải lên: 01/04/2014, 00:20

... Yvon Inc., Edison, NJ, USA) over the spectral range of 1.5 to 6.5 eV at an angle of incidence of 70° For the purpose of exploring electrical properties, a Pt/TiO2/ZrO2/p-Si MOS capacitor was fabricated ... layer of the ZrO -TiO Page of composite thin film was built Lastly, we can obtain the thickness of the as-deposited thin film with a ZrO2 layer (L1) of 27.639 ± 0.521 nm and TiO2 layer (L2) of 10.077 ... the high-resolution TEM images of the interface property of the TiO2/ZrO2 /Si films It is believed that the interface layers play an important role on the electrical properties, including the dielectric...

Ngày tải lên: 20/06/2014, 21:20

... effects of the sintering temperatures on the structural and electrical properties were investigated Increasing sintering temperatures improve the grain growth, densification, and electrical properties ... dielectric properties of (Na0.44K0.52)Nb0.84O3Li0.04(Sb0.06Ta0.1)O3 ceramics with sintering temperature Electronic Materials Letters 2011, 7:205 [3] Nam SP, Lee SG, Bae SG, Lee YH: Electrical properties ... Effect of Li substitution on the piezoelectric properties of potassium sodium niobate ceramics Jpn J Appl Phys 2005, 44:6136 Figure XRD patterns of 0.98NKN-0.02BZT ceramics Figure XRD patterns of...

Ngày tải lên: 20/06/2014, 23:20

... than those of BLG, but at the DC bias of +3 V, the ΔC values of SLG are larger than those of BLG Figure 2e, f Page of 0 Figure AFM image of graphene (a) Tapping-mode height image of the graphene ... afterwards instead of the dC/dV amplitude The line profiles of ΔC obtained on SLG and BLG are shown in Figure 2c, d, respectively It can be seen that at the DC bias of V, the ΔC values of SLG are slightly ... Figure The dC/dV amplitude images of graphene on SiO2 The dC/dV amplitude images of graphene on SiO2 obtained at DC biases of V (a) and +3 V (b) The line profiles of the marked lines (from right...

Ngày tải lên: 21/06/2014, 00:20

... vapor grown carbon nanofiber on thermal and mechanical properties of epoxy J Mater Sci 2007, 42:7544 Prasse T, Cavillé J-Y, Bauhofer W: Electric anisotropy of carbon nanofibre/ epoxy resin composites ... electrical properties A homogenous VGCNF dispersion does not necessarily imply better electrical properties In fact, it seems that the presence of well-distributed clusters is more important for the electrical ... understanding of the relationships between VGCNF dispersion and the electrical properties, which is an important step to pave the way for further research into tailoring the properties of these nanocomposites...

Ngày tải lên: 21/06/2014, 03:20

... conductivity of inclusions increases the locally sensed capacitance, and thus, the difference of electrical properties of silicon and CrSi2 gives a better contrast for the detection of the NCs ... differences in the vicinity of NCs Across most of the surface, the current was nearly constant and even independent of the polarity of the bias Locally, evidence of rectification could be observed ... (b) SCM image of the same area cross section of the SCM image across a NC is shown in Figure The half-width of the peak agrees with the size of the NCs It shows that the interaction of the charged...

Ngày tải lên: 21/06/2014, 05:20

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Ngày tải lên: 21/06/2014, 05:42

... thickness of the high-k layer is observed [23], leading to a smaller equivalent oxide thickness (EOT) [17] The impact of the polycrystallization of the Al O layer on the electrical conduction of the ... which could be attributed to the different electrical properties of nanocrystals and grain boundaries Taking advantage of the large lateral resolution of the CAFM, a more detailed analysis has ... and trapping properties of the stacks, which could reduce the reliability of the MOS devices due to the weaker dielectric strength of the grain boundaries Finally, the influence of the environment...

Ngày tải lên: 21/06/2014, 06:20

... partly due to the effect of a different crystal structure in this series of materials Hence, this study showed that the observed dielectric and ferroelectric properties of BNTZ ceramics largely ... and electrical properties of bismuth sodium titanate zirconate ceramics Nanoscale Research Letters 2012 7:57 Author details Department of Physics and Materials Science, Faculty of Science, Chiang ... breakdown field strengths of BNTZ ceramics, respectively The hysteresis loops were obtained at the maximum applied electric field of 20 kV/ cm and a frequency of 50 Hz The shape of the P-E loops varied...

Ngày tải lên: 21/06/2014, 17:20

... mechanical properties of materials It is not intended to be a comprehensive review of all the different aspects of mechanical properties; such a task would be beyond the capabilities of any single ... classes of materials Following a brief introduction to materials science and basic strength of materials, the fundamentals of elasticity and plasticity are presented, prior to a discussion of strengthening ... macroscopic level of understanding of structure [Figs 16(a)–(d)] They are often unaware of the atomic and microstructural constituents that can affect the mechanical behavior of materials and of the role...

Ngày tải lên: 27/06/2014, 15:20

... mechanical properties of materials It is not intended to be a comprehensive review of all the different aspects of mechanical properties; such a task would be beyond the capabilities of any single ... classes of materials Following a brief introduction to materials science and basic strength of materials, the fundamentals of elasticity and plasticity are presented, prior to a discussion of strengthening ... understanding of the basic concepts that govern the mechanical properties of materials To ensure a wide audience, I have assumed only a basic knowledge of algebra and calculus in the presentation of mathematical...

Ngày tải lên: 11/08/2014, 15:20

... macroscopic level of understanding of structure [Figs 16(a)–(d)] They are often unaware of the atomic and microstructural constituents that can affect the mechanical behavior of materials and of the role ... introduction to the structure of materials has been presented in this chapter Following a review of the structure of crystalline and amorphous materials, the different classes of materials (metals, polymers, ... treatment of the fundamentals of the mechanical behavior of materials The text provides a rigorous review of the fundamental mechanics aspects of the mechanical behavior of materials Shackleford, J...

Ngày tải lên: 11/08/2014, 15:20

... and 2.8(f) These may be thought of as the absence of a plane of atoms (intrinsic stacking faults) or the insertion of rows of atoms that disturb the arrangement of atoms (extrinsic stacking faults) ... brittle materials are often associated with statistical distributions of defects The situation is somewhat different in the case of metallic materials In addition to the inherent strength of metallic ... geological time scales (millions of years) in materials within the earth’s crust A study of the micromechanisms of creep and creep fracture is often a guide to the development of phenomenological relations...

Ngày tải lên: 11/08/2014, 15:20