Materials Literature
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Luminescent composites based on SiO 2 matrices synthesized using the sol-gel method and organic scintillators PPO and o-POPOP are produced, and their optical, luminescent, and scintillation characteristics are studied. It is shown that these composites generate an intense photoluminescence signal, possess a nanosecond…
The adsorption properties of γ-Al 2 O 3 , both in the original form and as modified with NiO nanoparticles and [NiO+Ag] bimetallic nanoparticles, were studied using the dynamic sorption method. n-Alkanes (C 6 –C 8 ), benzene, chloroform, diethyl ether, toluene, and ethylbenzene were used as test adsorbates. The adsorp…
Some specific properties of antiferromagnetically ordered crystals, such as the antiferromagnetic photovoltaic effect, interaction of spin waves with polar optical phonons, and the effect of this interaction on the structural phase transitions and magnetic transitions into incommensurate structures, have been consider…
The features of the image contrast of nitrogen-doped multiwall carbon nanotubes (CNTs) in electrostatic force microscopy (EFM) are studied. It is established that the magnitude and shape profile of the EFM signal depend on the CNT conductivity and diameter. It is shown that an increase in the conductivity of CNT leads…
The emerging lithography tools with large numbers of parallel electron beams and direct-write capabilities provide an alternative solution to achieve high-resolution and high-throughput lithography for advanced CMOS nodes [Pain et al., C. R. Acad. Sci., Ser. IIB 7, 910 (2006); de Boer et al., Proc. SPIE 8680, 86800O (…
The article presents the application of computed tomography (CT) for the detection of internal material defects in roller bearing rings made of steel. The tests were conducted using a set of four rings with different defects created artificially by means of electric discharge machining. In each test ring, several defe…
A simple template assembled sol-gel method is used to prepare the wire-liked NiFe2O4 nano-particles with high specific surface area and excellent magnetic. Influence of template and calcined temperatures on the composition, microstructure, BET, magnetic properties as well as radio frequency(RF) heating rate are studie…
Magnetic flux leakage transformer (MFLT) is widely used in the stable power supply of electronic equipment. For MFLT, whose characteristics become more complex and nonlinear for its leakage and load, the traditional circuit analysis method of transformer could not describe it accurately. In this paper, a nonlinear-tra…
In the traditional approach to circuit design the supply voltages for each transistor/gate are set sufficiently high so that with sufficiently high probability no transistor fails. One potential method to attain more energy-efficient circuits is Near-Threshold Computing, which simply means that the supply voltages are…
A novel cationic type asphalt emulsifier of 2-triethylenetetramine methylene-4-nonylphenol was synthesized by the reaction of nonyl phenol, triethylenetetramine and formaldehyde. The optimum reaction condition was obtained. The yield reaches 49.21% at the optimum reaction condition of the feedstock mole ratio of forma…
Results of measurements of the relative brine content (Q m ) and proton magnetic relaxation time (T 1) in the liquid phase of freezing sea water at temperatures between −2°C and −43°C are given for variable directions of temperature changes using different pulse and stationary methods of NMR. The results are compared…
The influence of three different types of halloysite nanotubes (HNTs) with different dimensions, namely as camel lake (CLA), Jarrahdale (JA) and Matauri Bay (MB), on their reinforcing ability of ethylene propylene dine monomer (EPDM) were investigated by varying the HNTs loading (from 0-15 phr). Mechanical properties…
Tan Delta testing is a diagnostic method of testing cables to determine the quality of the cable insulation. This helps create a systemized method to analyse aging of cables in the long run. It utilizes the phase shifts caused by the displacement current induced due to the existence of impurities in the insulation or…
In this paper, a precise approach is proposed to detect DE in induction motors under unbalanced voltages. To achieve this goal, one essential problem is dealt with: The frequencies of the components caused by the DE in the stator current spectrum are similar to some of the frequencies introduced by the unbalanced volt…
Tellurium film modified glassy carbon electrode (TeFE) is presented in this paper as a promising alternative candidate for simultaneous electrochemical determination of Cd(II) and Pb(II) using anodic stripping voltammetry (ASV) analysis. Key operational parameters, including deposition potential and deposition time we…
The recent advances in thin-film thermoelectric (TE) materials have created opportunities for on-chip cooling and energy-harvesting with heat-fluxes >100W/cm2. However, it remains unclear how effective these materials are in the context of realistic microprocessor floorplan and workloads. Moreover, these TE materials…
Reaction between isopropyl phenyl ketoxime and acetylene in the KOH–DMSO–n-hexane system (70 °C, ∼ 5 min), along with known 3,3-dimethyl-2-phenyl-3H-pyrrole (51% yield) and 4,4-dimethyl-5-phenyl-1-vinyl-2-pyrrolidinone (7% yield), affords also unexpected 2-(2-ethynyl-3,3-dimethyl-2-phenyl-1-aziranyl)-4,4-dimethyl-5-ph…
In the BEOL (back end of line) process, tungsten (W) chemical mechanical planarization (CMP) has been commonly used to form contacts. As size of the metal line is shrunk, metal CMP will directly impacts resistance and reliability characteristic of final product. As examples, W contact recess and seam (or void) defects…
This paper discusses CNT's applications in thermal management. High-performance heat dissipation pastes for thermal interface applications were developed by dispersing CNT powder into a silicone oil that widely used in thermal interface material, Thermal conductivities of the resulting samples were measured. The effec…
This paper proposes the operation of an energy storage devices consisting of a Li-Ion battery module and a supercapacitor (SC) bank for future transportation with a fuel cell (FC) as the main power source, so that FC vehicles (FCVs) with energy storage devices could result in reduced cost, improved fuel economy, lifet…