Materials Literature
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We consider heat conduction in a nonlinear inductance-capacitance (LC) transmission line with an inductance gradient by adding white-noise signals. It is found that the heat flux in the direction of inductance decrease is larger than that in the direction of inductance increase. When the low-inductance end is at highe…
We have developed a CMOS compatible fabrication process module for the controllable fabrication of high-performance photonic crystal devices using deep-UV photolithography. We will show the high-performance photonic crystal waveguides with air isolation trench underneath in order to achieve better light confinement. T…
Prepared rare-earth La modified amorphous ribbon by doping Rare-earth La in Fe78Si9B13amorphous alloy. Investigated rare-earth content and annealing temperature as well as their influence on the magnetic induction effect and its amplitude. The results show that, when magnetic field is less than 1356 A/m, with the incr…
This paper presents the method to determine the input impedance of conjugately characteristic-impedance transmission lines (CCITLs), implemented by multi-section lossless transmission lines (TLs), which can exhibit both non-negative (NNCR) and negative characteristic resistances (NCR). Meta-Smith charts are effectivel…
It had been studied that thermal deformation properties of super-alloy Inconel690(IN690) by thermal simulation on Gleeble 3800 Simulator, which the ranges of temperature was 1000～1200°Cand strain rates was 1.0～80/s. According to the experiment data, the critical conditions of super-alloy Inconel690 had been researched…
The fore-expansion tube structure of the three-way catalyst converter shell used in a certain light-duty vehicle is improved, three improved schemes are proposed. For the flow field in the catalyst, its mathematical model is established, its numerical value is simulated by using the computational fluid dynamics softwa…
As areias negras das praias de Iriri (ES) apresentam uma ampla variedade no seu conteúdo mineralógico. A partir de propriedades ópticas e morfológicas e das composições químicas de grãos individuais, foi verificado que os principais minerais são quartzo e ilmenita, constituindo, respectivamente, 45% e 35% do volume do…
Abstract Flow control in hot aggressive melts is a big challenge for metallurgical and glass technology applications. For instance, during the production of float glass, the glass melt solidifies on the top of a liquid tin bath. To achieve a spatially homogeneous glass thickness, both global and local control of the t…
The microstructures and phase constituent of as-cast Mg-5Sn-5Zn-xSr (x=0, 0.5, 1, 2) alloys were analyzed by the optical microscopy (OM), the scanning electron microscope (SEM) and the X-ray diffraction (XRD). The results indicate that an addition of 0.5%-2% (mass fraction) Sr to the Mg-5Zn-5Sn alloy not only refines…
A unified model which takes into account an interfacial layer between electrode and ferroelectric film has been developed to study the fatigue, imprint and retention failures of ferroelectric capacitors. The anomalous shift of the hysteresis loops observed experimentally has been correctly reproduced with this model.…
Abstract Under UV excitation, the LiInW2O8:Eu3+ phosphor exhibits an intense red emission and the LiInW2O8:Dy3+ and LiInW2O8:Dy3+/Eu3+ phosphors show white emission.
In this paper, we analyze the compact models for carbon nanotube field-effect transistors (CNTFET) and observe that the logic-gates implemented using CNTFET with unoptimized device parameter have asymmetric voltage transfer characteristic. We propose the design of a balanced inverter circuit implemented using CNTFET d…
We report the temperature- and frequency-dependent dielectric spectrum of magnetite ceramic single phase samples at 77.4–300K and 200Hz–1 MHz. In temperature-dependent dc resistivity, the sharp transition expected in single crystals is much suppressed. At higher temperatures, the grain boundaries contribute to the rel…
The complex reaction of diffusion-induced grain-boundary migration (DIGM), discontinuous precipitation, and dissolution of phases in a precipitation-hardened lead-antimony alloy has been studied. The concentration profile of Sb in front of the migrating boundary has been measured. At the reaction front, there is obser…
In the paper "New Polyamides with Main Chain Cyanine Chromophores" by M.Ya.
A quaternary mutual system of fluorides, chlorides, and bromides of lithium and cesium was partitioned into simplexes by a geometric method and by a graph method. Phase transformations and chemical reactions in the bordering ternary mutual systems were described. A conversion line was experimentally studied, and infor…
In the present study 5% Ca doped PZT ceramics were prepared. DTA/TG of the green gel shows that the weight loss after 600°C was negligible and so this temperature was taken as calcinations temperature of the PCZT powder. X ray diffraction (XRD) analysis of calcined powders shows crystalline phase without pyrochlore ph…
To develop novel electromagnetic devices, it is essential to model accurately the magnetic properties of materials. Starting from the scalar magnetic hysteresis, this talk presents a systematic study of measurement and modeling of magnetic properties of different soft magnetic materials under various magnetizations, i…
In the last decade, nanosized phosphors had attracted a lot of interest, no matter in light emitting layers or thermal remove materials. Many methods had been investigated to synthesize nanosized phosphors, but they usually need expensive cost and complicated procedures, furthermore they resulted in the difficulties i…
In order to achieve cost-effective inner electrodes for the multilayer BaTiO3-based ceramics having a positive temperature coefficient of resistivity (PTCR), we fabricated Ni paste based on Ni powder and investigated the effect of Ni electrode on the performance of semiconducting BaTiO3 ceramics. We adjusted the parti…