Materials Literature
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Energy distribution function for electrons in SF6-Ar mixtures gas used by MCS-BEq algorithm has been analysed over the E/N range 30～300[Td] by a two term Boltzmann equation and a Monte Carlo Simulation using a set of electron cross sections determined by other authors experimentally the electron swarm parameters for 0…
Introduzido por Parker em 1961, o método do pulso de energia (Método Flash) é a mais usada e mais conhecida técnica para a determinação da difusividade térmica de materiais cerâmicos. Consiste de um método direto na determinação da difusividade térmica, no qual um pulso de energia radiante e de curta duração é incidid…
Abstract Isolation and structural elucidation of norperovskatone (I) and biperovskatone (II) are described.
Novel organic compounds N′-(5-arylazosalicylidene) nicotinohydrazide (3) and their derivatives (4 and 5) were synthesized and their structures were elucidated and confirmed by the spectral techniques like IR, 1H, 13C and 2D NMR. The stable configuration of the above structures achieved theoretically using DFT method w…
Aquest projecte es no sols una feina de projecte de recerca d’informacio sobre soldeig si no que el seu objectiu es disposar d’una eina de consulta de facil acces per la gent interessada a realitzar alguna estructura mecanosoldada. Per poder complir amb l’objectiu principal de ser aquesta eina de consulta de facil acc…
Due to their ability to trap high magnetic fields, bulk (RE)BCO superconductors can be used as powerful permanent magnets in various engineering applications such as rotating machines and magnetic bearings. We combine soft ferromagnetic pieces with bulk, large grain (RE)BCO high temperature superconductors to form sup…
This paper deals with synthesis & characterization of Cobalt – doped Polyaniline. This Cobalt – doped Polyaniline were characterized by UV–Visible (UV-Vis-NIR V670JASCO), FTIR spectroscopy and XRD analysis techniques and the various results obtained have been explained. Due to the advantages of material abundance and…
In this study, we prepared chitosan derivative modified magnetic cored dendrimer (CCMD) for cationic and anionic dye adsorption. Chitosan and its derivatives are naturally abundant biopolymer which has excellent properties including high adsorption capacity. We synthesized magnetic-cored dendrimers (MD) with chitosan…
peer reviewed
Alkalis are essential in Cu(In,Ga)Se2 absorber layers for efficient solar cells. Current doping methods rely on solid state diffusion of an alkali through to the absorber layer, e.g. a thin NaF layer on Mo or NaCl dissolved in a metal precursor ink[1]. The apparent concentration of alkali in the final absorber is dete…
A new dinuclear zinc(II) complex, [Zn 2 Br 2 L 2 ] ( I ), was prepared from 4-methyl-2-[(2-methylaminoethyl-imino)methyl]phenol (HL) with zinc bromide in methanol. Self-assembly of I with ammonium thiocyanate in methanol afforded the mononuclear complex [Zn(L)(HL)] 2 [Zn(NCS) 4 ] ( II ). Structures of complexes I , II…
Ligas de cobalto so utilizadas em diversas aplicaes industriais devido, principalmente, as suas boas propriedades em temperaturas elevadas. Uma das aplicaes em guias de laminao a quente utilizadas no processo Mannesmann. Em busca de compreender o desgaste e aumentar a vida til deste componente do processo de fabricao…
A novel heterometallic coordination polymer {[Cd2(NiL)2(Btca)4] · H2O} n (I) (H2L = 2,3-dioxo5,6,14,15-dibenzo-1,4,8,12-tetraazacyclo-pentadeca-7,13-dien, H2Btca = benzotriazole-5-carboxylic acid) was synthesized and structurally characterized by elemental analysis, IR spectroscopy, and single crystal X-ray diffractio…
Functional components such as multilayer low temperature co-fired ceramics are examples of the combination of a ceramic-based substrate with internal electrodes as well as surface features (e.g. metallization, contacting pads, cylindrical vias, etc) employed to provide the component with a given functionality. Another…
Based on materials, different punch radii (0.3, 0.35, 0.4, 0.45, and 0.5 mm), two sets of diameter-diameter ratio 1.(.167, 1.25, 1.33, 1.4167, and 1.5) and 2.(1.6, 1.45, 1.33, 1.231, and 1.143), and two sets of depth ratio 1.(1.3, 1.4, 1.5, 1.6, and 1.7) and 2.(2.14, 1.875, 1.67, 1.5, and 1.36) are used for the stampi…
The article considers the prospect of a combined-cycle plant with freon as the working fluid of the steam turbine. Methodical approach to the study of such plants is expounded. For the option, CCGT with gas turbine M701G2 and use of freon R134a results of calculations of technical and economic efficiency, gas-dynamic…
The dynamics of quasi-particle (QP) excitations with different symmetry is investigated in the superconducting (SC) and pseudogap (PG) states of the high-temperature superconductor [Formula: see text] (Bi2212) using a polarization-sensitive optical pump-probe measurement. The observation of distinct anisotropies for S…
The aim of this work was to analyze changes in local toughness KCV using Charpy V-notch impact tests in the slab surface zone in relation to the microstructure in ULC/ IF steel and TiNb HSLA steel. Marked heterogeneity in KCV values was confirmed in the surface zone across the width of transitional slabs. Distinct loc…
A method based on the kink mechanism is proposed for calculating the switching kinetics of the states of quasi-one-dimensional systems and corresponding hysteresis curves. The role of defects in actual materials is noted, and possible causes of the transition to athermal behavior upon a reduction in temperature are di…
시멘트 몰탈의 보습제로 사용되는 hydroxypropylmethyl cellulose(HPMC)가 몰탈의 증점성과 보습성에 미치는 영향을 살펴보고 이에 따른 몰탈의 기계적 특성을 살펴보았다. HPMC의 치환도(MS/DS)가 증가됨에 따라 셀룰로오스가 갖는 수소결합이 약해져 친수성이 증가되며 이러한 친수성 증가는 몰탈에 존재하는 수분을 HPMC가 흡수하여 몰탈의 점도 증가와 몰탈의 보습성을 유지시킬 수 있었다. 보습성의 증가는 양생 시 C₃S와 C₂S 수화과정을 촉진시켜 몰탈의 부착강도와 압축강도를 증가시킴을 알 수 있었다. 압축강도의 증가는 보습제와 소포제를 함께…