Materials Literature
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A GaN growth technique using Ga 2 O vapor allows high-temperature growth, which results in high-crystalline GaN. In this study, we succeeded in increasing the growth rate up to 180 µm/h, and with this technique, we maintained the crystallinity of the epitaxial layers at the same level as the crystallinity of the seed…
Thermal engineers require accurate package-level resistance estimates to design optimized cooling systems. Although Theta-JC is a commonly quoted metric to define the junction to case resistance, it does not accurately predict package performance for a range of heat sink and thermal interface material (TIM) conditions…
An important application that may boost the use of magnetic-field controlled organic devices is significant magnetically modulated electroluminescence (MEL) at room temperature (RT). Whereas inorganic magnetic tunnel junctions show RT magneto-resistance (MR)> 80%, these devices do not exhibit electroluminescence. In c…
Features of the analysis of elemental composition of thin boron carbonitride films by energy dispersive X-ray spectroscopy are discussed. The films are also studied by IR spectroscopy and scanning electron microscopy in order to obtain data on their elemental composition, types of chemical bonds, and surface morpholog…
The pyrolysis kinetic behaviors and reaction mechanism of polycarbosilane (PCS) were characterized by means of XRD, SEM and on-line TG-DSC-FTIR-MS coupling technique, which showed that the pyrolysis process accorded with the F2 integral model (300-600°C), and the values of apparent activation energy (Ea) and pre-expon…
Voltage sag and harmonics are major problems that affects the power quality thereby causes severe damage to customer equipments. These power quality problems can be mitigated efficiently using Dynamic Voltage Restorer (DVR). This paper proposed two control strategies namely PI controller and Fuzzy Logic Controller wit…
The effect of dynamic hot compaction (DHC) and intensive plastic torsional deformation (IPTD) on the structure and properties fullerene-containing powdered compositions of Fe graphite and Fe cast iron has been investigated. It is found that sintering Fe graphite samples results in the synthesis of fullerenes in their…
The economy of desulfurization system is of great significance for operation of desulfurization system and improving the environment quality in power plant. Based on the desulfurization power price policy, this paper analyzes the cost and benefit structure of the wet flue gas desulfurization system in Chinese power pl…
A chlorinated resist named ZEP changes from positive- to negative-tone with a high dose of electron beam irradiation. The sensitivities to a 100-kV electron beam as a dual positive- and negative-tone resist are evaluated with various developers. Although the positive-tone sensitivity varies with different developers o…
Angular distributions of electrons intersecting 40- and 120-μm aluminum foils and a 60-μm copper foil have been measured. Electrons have been injected from a microtron with a particle energy of 7.4 MeV. The effect of the material and thickness of a foil, as well as of the direction of injection, on the spatial distrib…
B1-xLaxFeO3 (x = 0.0, 0.025) crystallites were prepared by chemical solution route. XRD analysis confirmed the phase formation of the materials. Thermal characterization was done by DSC-TGA to confirm crystallization and thermal behavior for phase development. Morphological studies by FESEM showed the agglomerated nat…
A novel 3D Frequency Selective Surface (FSS) with horn shaped resonators is proposed which exhibits a very wide stop band. This new horn shaped resonator is a modification from a 3D FSS consisting of square cylinder unit elements. This feature introduces frequency-selective surfaces with the added advantage of lowerin…
Tetrafluoroethylene (TFE) telomeres were synthesized in a butyl chloride solution using the radiation-chemical initiation of the reaction. The surface of a polyester material was modified with TFE telomeres to impart superhydrophobic properties to the fabric.
The external envelope of steel framed industrial buildings normally involves the use of purlins and rails spanning between the main hot-rolled frames to support the roofing/cladding. These purlins are typically light-gauge cold-formed steel members of complex shape for which the thinness of the material means that loc…
The electronic structure and formation energies of Ni-doped CuAlO 2 are calculated by first-principles calculations. Our results show that Ni is good for p-type doping in CuAlO 2 . When Ni is doped into CuAlO 2 , it prefers to substitute Al-site. Ni Al is a shallow acceptor, while Ni Cu is a deep acceptor and its form…
Microcapsules are inevitable defects in the resin matrix, which would greatly influence on mechanical performance of structural material. Therefore, a balance value of microcapsule's content between self-healing properties and mechanical properties should be provided for fabricating adequate self-healing materials. Ep…
Nanostructured perovskite oxides of Ba0.2Sr0.8Co0.8Fe0.2O3−δ (BSCF) were synthesized through the co-precipitation method. The thermal decomposition, phase formation and thermal expansion behavior of BSCF were characterized by thermogravimetric analysis, X-ray diffraction (XRD), and dilatometry, respectively. XRD peaks…
Brain damage is often irreversible due to poor brain's self-repairing ability. New treatment strategies focused on stem cell therapy and 3-dimension matrix for brain tissue injury. The extracellular matrix (ECM) of animal tissues is a complex mixture of macromolecules that play an essential instructional role in the d…
In this work, FT-IR, FT-Raman, and FT-NMR spectra of 4-Methylesculetin molecule are presented for the first time. FT-IR, FT-Raman, and FT-NMR spectra of 4MEC have been recorded and analyzed. The FT-IR and FT-Raman spectra of this molecule are recorded at 4000-400 cm −1 and 50–3500 cm −1 , respectively. The infrared vi…
The aerobic biodegradability of acrylate copolymers for warp sizing was studied using the shaking-bottle incubating method for their COD removal rates after being cultivated for 30 days. Influences of acrylate unit chemical structure, including the alkyl chain length of the ester group, α-methyl group, and molar conte…