نتایج جستجو برای: electrical resistivity
تعداد نتایج: 201117 فیلتر نتایج به سال:
The Boltzmann equation is a semiclassical approach to the calculation of the electrical conductivity. In this work we will first introduce a simple model for calculation of thin film resistivity and show that in an appropriate condition the resistivity of thin films depends on the electron mean free path, so that studying and measurement of thin films resistivity as a function of film thickne...
molybdenum thin films with 50 and 150 nm thicknesses were deposited on silicon substrates, using dc magnetron sputtering system, then post-annealed at different temperatures (200, 325, 450, 575 and 700°c) with flow oxygen at 200 sccm (standard cubic centimeter per minute). the crystallographic structure of the films was obtained by means of x-ray diffraction (xrd) analysis. an atomic force micr...
This study provides forensic search teams with systematic geophysical monitoring data over simulated clandestine graves for comparison to active cases. Simulated ‘wrapped’ and ‘naked’ burials were created. Multi-geophysical surveys were collected over a three-year monitoring period. Bulk ground resistivity, Electrical Resistivity Imaging, multi-frequency Ground Penetrating Radar and grave ‘soil...
Electrical resistivity evolution during precipitation in Al-Sc alloys is modeled using cluster dynamics. This mesoscopic modeling has already been shown to correctly predict the time evolution of the precipitate size distribution. In this work, we show that it leads too to resistivity predictions in quantitative agreement with experimental data. We only assume that all clusters contribute to th...
The aging of insulating materials can be estimated by an electrical breakdown occurring in electrical components so that the relationship between lifetime, failure probability and reliability of electrical components may be studied using the life models in high voltage cables networks. In last decades with attention to higher features as electrical, thermal, mechanical characteristic, widely cr...
High reliability capacitors require a dielectric layer with both high electrical resistivity and high static dielectric constant. The most commonly used material platform for low cost, base metal electrode capacitors (BME) consists of nickel electrodes and barium titanate-based dielectric layers. Barium titanate (BaTiO3) is ferroelectric material with dielectric constant that depends on factors...
[1] Quantifying the spatial configuration of hydraulic conductivity (K) in heterogeneous geological environments is essential for accurate predictions of contaminant transport, but is difficult because of the inherent limitations in resolution and coverage associated with traditional hydrological measurements. To address this issue, we consider crosshole and surface‐based electrical resistivity...
We investigate the discontinuous ferromagnetic phase diagram near tricritical point in UCo1xRuxAl compounds by electrical resistivity measurements. Separation of phases in UCo0.995Ru0.005Al at ambient pressure and in UCo0.990Ru0.010Al at pressure of 0.2 GPa and disappearance of ferromagnetism at 0.4 GPa is confirmed. The exponent of temperature dependence of electrical resistivity implies chang...
The degree of dispersion of short microfibers in cement, as assessed by electrical resistivity measurement for the case of electrically conductive fibers at a volume fraction below the percolation threshold, is improved by the use of admixtures ~namely, silica fume, acrylic particle dispersion, methylcellulose solution, and silane! and fiber surface treatment ~such as ozone treatment!. Acrylic ...
The electrical transport properties of carbon nanotube/polymer composite films are investigated using temperatureand field-dependent resistivity measurements. By utilizing heatand chemical-based methods of cross-linking, it is possible to decrease the film resistivity by nearly 80% and modify the relative mobilities of electrons and holes, thereby altering the dominant carrier type in the films...
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