Materials Literature
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Factory acceptance tests performed on High Voltage Direct Current (HVDC) transmission apparatus usually involve the application of high direct voltage and switching impulse voltage in separate withstand tests used to qualify the insulation system. However, the actual stress subjected to the equipment insulation system…
The objective of this work is to investigate the influence of slotted air gap constructive parameters on magnetic flux density of rotating machines. For this purpose, different approaches were used to solve the air gap field diagram using finite element method and the magnetic field distribution uniformity was evaluat…
The charge accumulation under DC voltage on the insulator interface is one of the critical factors that restrict the development of HVDC-GIL. The Saturated time and the final electrical field strength is determined by the volume conductivity. Therefore, in this paper, the interface charge accumulation model of operati…
High performance deep sub-micron T-gate AlGaN/GaN MOSHEMTs are demonstrated using lattice matched ALE MgCaO as gate dielectric. The 120 nm-Lg MOSHEMT has an IDMAXof 1.2 A/mm, Ronof 1.5 Ω·mm, a ft/fmaxof 101/150 GHz, with negligible hysteresis and IG, showing the promise as a GaN MOS technology. The work at Purdue Univ…
Recently, β-Ga2O3FETs have been introduced [1]-[3] as potential devices for high power, switching, and RF applications with increased performance and more cost effective means of production when compared to GaN or SiC. Documented material properties leading to a Baliga [4] figure of merit nearly four times that of GaN…
Current collapse will cause electrically recession such as reducing the output current density and increasing the dynamic on-resistance. The phenomenon becomes more serious when the device is under high operating voltage and high switching speed. In order to investigate the phenomenon of current collapse, the dynamic…
The heat sink integrated transfer molded power module has been developed in order to improve power density for the industrial inverter power module. In the conventional case type structure, heat from semiconductor chips has dissipated to the heat sink through the grease. However, with the introduction of Thermal Condu…
To obtain solutions of the hyperbolic Allen-Calm equation, the first integral method, which follows from well-known Hilbert Null-theorem, is used. Exact analytical solutions are obtained in a form of traveling waves, which define complete class of the hyperbolic Allen-Calm equation. It is shown that two subclasses of…
We detect a relaxation process of excited SQ02 dye in the chlorobenzene solution and anchor SQ02 on Al2O3 and TiO2 film, so as to investigate the photophysical properties of pristine SQ02 in the monodisperse system, aggregation state, and the corresponding interfacial electron transfer process. The experimental data s…
The valence state of manganese ions in complex oxides La1–x Ca x MnO3 (x = 0.5, 0.7, 0.85, and 0.9) is studied on the basis of Mn2p and Mn3s X-ray photoelectron spectra. It is shown that manganese ions have the valence of Mn3+ and Mn4+ in the studied compounds. The relative Mn3+/Mn4+ content is determined.
This communication is devoted to theoretical analysis of the dynamics of a solitary cavitation bubble pulsating in a compressible viscous liquid under the action of a nonuniform acoustic field. The system of two nonlinear ordinary second-order differential equations is integrated numerically. In the range of acoustic…
Thailand is located in the tropical zone dominated by monsoons for more than six months in a year. These climatic conditions illustrate elevated relative humidity and temperature that contributes to Potential Induced Degradation (PID). Humidity has been reported to be potential cause of degradation in the systems with…
A mathematical model describing the isothermal spreading of a liquid droplet on a horizontal substrate with allowance for the effect of slipping is studied by quasi-stationary means. Patterns in the variation of the droplet profile and the wetting radius are determined within the considered model. Calculations for a d…
To demonstrate the capability of growing conductive interfaces through large-scale deposition, we deposited amorphous LaAlO 3 (LAO)/SrTiO 3 (STO) by using off-axis RF-sputtering. The LAO/STO thin film deposited within the 2.0-inch range exhibited conducting properties. To confirm the structural properties and ensure a…
Processing of shrimp shells for the production of chitin makes commercial use of shell waste with economic benefits. Although chitin possesses the valuable properties of a biopolymer, with many useful applications, significant environmental pollution during its production hampers growth opportunities for industrial pr…
Background and Objectives: Nanotechnology is an interesting research area due to production of nanoparticles of different sizes, shapes, chemical compositions, dispersity, and their numerous applications for human being. Creation, manipulation, and use of metallic nanoparticles is of great importance due to reduction…
The preparation of LaMnO 3 from various precursors via a solid-state reaction combined with codeposition and sorption is found to form perovskite phases with different stoichiometric deviations, depending on the temperature of synthesis. This favors the coexistence of orthorhombic (in solid-phase synthesis) and rhombo…
Abstract Two bismuth(III) complexes {[Bi(btx)0.5Cl4](Hbtx)}n (1) and [Bi2(Fbtx)Cl10](H2Fbtx)2(MeOH) (2) based on the nonfluorinated ligand 1,4‐bis[(1,2,4‐triazole‐1‐yl)methyl] benzene (btx) or the perfluorinated analogue 1,4‐bis[(1,2,4‐triazole‐1‐yl)methyl]‐2,3,5,6‐benzene (Fbtx) were synthesized and characterized. Si…
A novel imido-modified SiO2-supported Ti/Mg Ziegler-Natta catalyst for ethylene and ethylene/1-hexene polymerization is investigated. The catalyst is prepared by modification of (SiO2/MgO/MgCl2)TiClx Ziegler-Natta catalysts via supporting vanadium species followed by reaction with p-tolyl isocyanate as imido agents, t…
The rapid release of energy from Lattice Enabled (or Low Energy) Nuclear Reactions is of interest for three reasons. First, it constrains and challenges theories about the mechanism(s) active in producing LENR. Next, it might heavily influence the design of heat and electrical generators based on LENR, since they have…