Materials Literature
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This paper deals with results of electrochemical measurements carried out on reinforced concrete slabs. Measurements were performed four times a year over a period of two years by means of three kinds of device: a Gamry© laboratory potentiostat, and Gecor6© and Galvapulse© on-site apparatuses. Results showed that all…
Based on the silk fabric specifications database, the paper proposes two technological parameters of selvage tightness coefficient and selvage warp density coefficient, and realizes the quantitative relationship of corresponding parameters between selvage and fabric. By making use of thousands data of silk products in…
In this report, a metal-semiconductor-metal varactor diodes on top of an AlGaN/GaN-based epitaxial structure is proposed to the fast surge protection application. The fabricated device's capacitance-voltage (C-V) property and surge immunity are presented. In addition, to verify its capability for slow and fast surge a…
Multi-point spraying air-conditioning room is widely used in some textile mills due to the advantage of no spray pipe and high power water pump. This article take the textile air-conditioning rooms as an example, comparing with the design of supply air system and result of experiment tests, the characteristics of mult…
Thermal performance of AlGaN/GaN HEMT is a critical issue during the design stage, since it significantly affect the lifetime of the device. This paper introduces a three-dimensional modeling technique including electro-thermal coupling effects for investing the thermal characteristic of the AlGaN/GaN HEMT. The method…
Solar cells employing heterojunction emitters of amorphous silicon (a-Si) on a monocrystalline silicon (c-Si) substrate have demonstrated high efficiencies without requiring high-temperature processing [. An example of such a cell structure is shown in Figure 1. It has been found that the cell efficiency can be booste…
The formation condition, microstructure, and growth kinetics of the WO x layer for WO x resistive random access memory are investigated. To understand the optimal condition for the rapid thermal oxidation process which forms the WO x layer, various annealing temperature and annealing time are systemically studied thro…
We have exploited some of the features of molecular assembly (MA) process combined with artificial intelligence (AI) to manage three network design problems occurring simultaneously, namely nodes clustering, network hierarchy and firewall placement. These exploitations have been transformed into a design tool to manag…
본 연구에서는 비상시 전기 공급용 MCFC 프리커버터의 천연가스(메탄)로부터 수소의 생산량을 증가시키는 경우를 수치적으로 해석하였다. 상용 코드를 사용하였으며 촉매는 다공성 매질로 시뮬레이션 하였다. 3가지 주요 화학반응인 수증기 개질반응(SR), 수성 가스 전환(WGS) 및 직접 수증기 개질 반응(DSR)은 사용자 부프로그램을 사용하여 해석하였다. 프리컨버터에서 10%의 연료전환율을 얻기 위해 요구되는 추가 열량을 벽면을 통해 공급하게 되면 프리컨버터의 벽면 부근에서만 매우 불균일한 온도분포와 화학반응이 일어나는 것으로 분석되었다. 이와 같은 현상은 매우 작은 열…
The aim of this study was to fabricate 75:25 poly(DL-lactide-co-e-caprolactone), poly(DLL-co-CL) membranes for used in guided tissue regeneration (GTR). The copolymer was synthesized by ring-opening polymerization (ROP) in bulk. The 3-dimensional fiber networks with built-in microporosity membranes were prepared by el…
The carboxymethyl cellulose (CMC) with the different degree of substitution, which was synthesized in the mixed agent system of isopropanol and ethanol and water, was used in rechargeable Lithium batteries. The electrochemical performance of the 9,10-anthracenedione (AQ) electrodes with different binders were investig…
The microstructure and the mechanical properties of welding joint with the material of R60702 have been studied in this paper with the specimens made with the method of argon-arc welding, and the according mechanical properties of the weld joint have been compared with the annealed microstructure at the temperature of…
AISI 304L austenitic stainless steel was cold rolled to 90% with and no inter-pass cooling to produced 89% and 43% of deformation induced martensite respectively. The cold rolled specimens were annealed by isothermal and cyclic thermal process. The microstructures of the cold rolled and annealed specimens were studied…
Two new complexes, [M((H2O)(bpp)(Brip)]n (M = CoII (1) and NiII (2), bpp = 1,3-bi(4-pyridyl)propane, H2Brip = 5-bromoisophthalic acid), have been synthesized through hydrothermal reaction. They were characterized by elemental analysis, IR spectra, thermal analysis, magnetic properties, and X-ray single-crystal diffrac…
The aim of this research is to study the mechanical properties such as hardness ,wear resistance etc , of the magnesium oxide (MgO) doped alumina (Al2O3) and yttria stabilized zirconia (YSZ) composite, We first prepared MgO-doped Al2O3(denoted as Al4) by mixing Al2O3powder and 0.4 wt% of MgO powder. After that Al4powd…
Phosphates have been used for catalyst, adsorbent and so on. These applications required a large specific surface area of materials. Therefore, to improve their specific surface area, malonic acid, propionic acid, glycine, n-butylamine and urea were added to the preparation of tetravalent cerium phosphate from ammoniu…
In the solution of evolutionary problems in electrodynamics and in the numerical Finite Difference Time Domain (FDTD) method with Perfectly Matched Layer (PML) boundary conditions, reflections of electromagnetic waves from the boundaries inevitably arise. The nature and magnitude of these reflections depend on many pa…
7CrSiMnMoV (HRC65) hardened steel mold was cutted to investigate the effects of cutting parameters (cutting speed, feed speed, radial cutting depth, axial cutting depth) on cutting force and cutting temperature. Cutting was done with the ball-mill tool coating with TiAlN and without coolant with a high-speed. The aim…
The director field reorientation and the formation of steady vortex flows in doubly and obliquely oriented thin liquid-crystal cells under the temperature gradient have been theoretically described within the nonlinear generalization of the classical Ericksen-Leslie theory for describing liquid crystal hydrodynamics.…
In this study, α-Cordierite was synthesized via glass-route using kaolin, talc and dolomite as starting raw materials. All the materials were mixed using non-stoichiometric xCaO.21-xMgO-26Al2O3-53SiO2 and melted at 1540°C for 4 h followed by quenching. Various weight percentage (wt%) of CaO (0, 1, 3, 5, 6, 7, 8, 10, 1…