Materials Literature
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Resonant frequencies of natural circular dielectric resonator between its resonant modes has a close range each other, so some desired mode has to be chosen selectively from other modes. Therefore, a circular dielectric resonator with a capability to select the resonant mode is required. This can be overcome by artifi…
Layers of porous silicon with a varying degree of porosity between 30% and 75% were prepared by electrochemical etching from bulk-Si. Thickness of the layers was in a range of 2 to 4 μm. Acoustic impedance and velocity for longitudinal waves in a frequency range of 2 GHz were evaluated utilizing a BAW resonator built…
Methods have been developed for the synthesis of metal complexes of hydroxy-substituted tetraanthraquinonoporphyrazines. The yield of the target products has been improved via complexation with the corresponding methoxy derivatives and subsequent hydrolysis of the methoxy groups. Some physicochemical properties of sub…
In this article two methods are used to measure the temperature of needle eye during the high speed of sewing and the results are compared for calculating the precision in the measurement, Needle heatup is a big issue for apparel industry especially for automobile industry seat covers where a lot of synthetic material…
Metals (platinum, nickel, and lead) and oxides (manganese dioxide and molybdenum, chromium, cobalt, and niobium oxides) were deposited onto multiwalled carbon nanotubes by chemical and electrochemical methods. The resulting nanocomposites were tested as oxygen electrode materials for electrochemical power sources with…
Abstract TiO2-modified silica-based MCM-41 (Si-MCM-41) was prepared by liquid phase deposition (LPD) without a conventional fluorine scavenger such as H3BO3. TiO2 was deposited on Si-MCM-41 by LPD reactions for 1–48 h. Using Si-MCM-41, TiO2 was deposited on the inner surface of silica with etching phenomena. After the…
Abstract Charged colloids form “crystal” structures, wherein the colloidal particles are regularly arranged as a result of strong electrostatic interparticle interactions. We have reported that silica colloids containing pyridine (Py) form colloidal crystals upon heating. Herein, we report that in Py + silica colloids…
Abstract Photochemical grafting of ferrocene to Si was investigated in a vinylferrocene solution in tetrahydrofuran, diethyl ether, or dibutyl ether. The grafting of vinylferrocene onto a Si(111) surface was carried out by placing a hydrogen-terminated Si(111) substrate into a vinylferrocene–solvent solution and illum…
A design model development for electrical machines with laminated windings is presented. The focus is to provide manufacturable solutions for commercial vehicle traction applications. The machine is designed with axially distributed single-layer wave-winding segments with a core that builds a modular three-phase machi…
Through immersion precipitation phase inversion, poly(vinyldiene fluoride) (PVDF) membranes applied in ultrafiltration were prepared. The influences of four solvents on the phase separation of PVDF casting solutions and membrane structure were discussed by mechanism of skin-sublayer two steps precipitation. The result…
A new propagation layered media composed of a piezoelectric thin film and a substrate plate is studied in this work. The displacement profiles, phase velocities, and electromechanical coupling coefficients of Lamb wave modes are theoretically investigated for the c-axis oriented AlN films on cubic silicon carbide (3C-…
This paper proposes an alternative method to obtain the experimental determination of the flux linkage-current-position characteristics of a switched reluctance motor. Simulations are performed using different models of a phase of the motor. The results are compared with experimental measurements showing the influence…
Partial discharge (PD) occurring in gas void introduced during the manufacturing process of insulating constructions forms a serious threat to the life of insulation, hence it's necessary to clarify its mechanism. In our paper, the surface charge measurement system based on Pockels effect was constructed to detect the…
The resistive switching behavior recently observed in silicon oxide (SiOX) makes this material attractive to embedded resistive random access memory (RRAM) fabrication due to process compatibility. In SiOX-based RRAM devices, switching mechanism is closely correlated with defects in the oxides. Therefore developing a…
This article reports on the realization of high frequency surface acoustic wave (SAW) resonator architectures on a bi-layer aluminium nitride (AlN) /ultrananocrystalline diamond (UNCD) structure using electron beam lithography (EBL) and lift-off processes. The UNCD layer was simply synthesized using microwave plasma e…
Cellular transplantation for cardiac repair has emerged as an exciting treatment option for patients with myocardial infarction (MI) and heart failure. Animal models of post-infarction left ventricular remodeling have demonstrated an improvement in left ventricular (LV) function, decrease in scar size, and amelioratio…
We discuss the development of amorphous oxide semiconductor technology for optical sensor applications. In particular, we discuss the challenges of detecting visible wavelengths using this family of materials, which are known to be optically transparent due to their relatively large bandgap energy. One of the main iss…
The electrical power system (EPS) of the new generation more electric aircraft (MEA) is a kind of hybrid electrical power system including both AC and DC systems. With more and more pneumatic and hydraulic equipments replaced by the electric equipments, the capacity of the aircraft EPS has increased for a large amount…
This paper deals with the setting parameter optimization procedure for a multi-phase induction heating system considering transverse flux heating. This system is able to achieve uniform static heating of different thin/size metal pieces without movable inductor parts, yokes or magnetic screens. The goal is reached by…
The test method LAwave®measures the dispersion of surface acoustic waves induced by short laser pulses. The technique uses that the propagation velocity of the wave depends on the frequency in coated and surface modified materials. Measuring the dispersion of the surface acoustic wave enables to determine important pr…