Materials Literature
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By die-attaching GaN-based light-emitting diodes (LEDs) on Si substrates with eutectic AuSn solder, the external quantum efficiency of the LEDs was enhanced by 3.5% at a current input of 120 A/cm2. The enhancement of the external quantum efficiency of the die-attached LED chips is attributed to a reduction in compress…
The features of thermal methods for the determination of kinetic parameters of oxidation of carbon materials are considered in the article. A modified method for the determination of kinetic parameters on the basis of the quantities characterizing the steady state of a system is suggested.
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In recent years, clay filled polymer nanocomposites are manufactured for a variety of advanced applications due to the abundant resource in nature, platelet structure bearing high aspect ratio, high efficiency, and promising ion-exchange capacity of clay minerals, especially Montmorillonite.To achieve a moderate level…
Discrete structural models, as a basis for evolving a new design methodology, created the need for considering structural configuration as a variable. Existing energy methods and variational principles do not provide analysis link between pairs of structural configurations, whereas Principle of Quasi Work addresses th…
Transitional metal dichalcogenides (TMDs) have emerged to be one of the most promising materials for next-generation electronics due to their unusual electronic and photoeletronic properties.Wet chemistry exfoliation proves to be a practical method to exfoliate TMDs in large scale that is usually based on n-butyl lith…
Bu almada, tabular almina (TA), beyaz ergimi almina (WFA) ve her ikisinin karm (%50 TA+ % 50 WFA) tayc tanelerin zellikle elik pota endstrisinde yaygn olarak kullanlan yksek alminal dklebilir refrakterlerin fiziksel ve mekaniksel zelliklerine etkileri aratrlmtr. Bu kapsamda, yksek almina ierikli bu tayc tanelerin ve d…
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Several CVD diamond films were etched using ECR plasma in different magnetic fields and working pressure. Double probe and ion sensitive probe were used to investigate the influence of magnetic field and working pressure on etching effect. Results showed that when the divergence magnetic field was changed to the conve…
A developed classification of passive heat residual removal systems from reactors containments allows conducting a detailed analysis of various concepts of passive residual heat removal from the protective shells of nuclear reactors (HPRS-С) of the new generation. Based on our analysis of the various projects of new r…
In order to research effect of plating parameters on wear resistance of Ni-SiC composite coatings, Ni coatings and Ni-SiC composite coatings were synthesized on steel substrates by electrodeposition method. The results indicate that the contents of SiC particles increase with density of pulse current and on-duty ratio…
The current work explains the influence of the polymer substrate on the topography formation of nano-wrinkled thin titanium films. Similar to the biomimetic antetype of human skin, this wrinkling phenomenon increases the elastic deformability of hard materials under tensile loading by flattening the wrinkled waves bef…
The intentional buckling design of micro-films has various potential applications in engineering. The buckling amplitude and critical strain of micro-films are the crucial parameters for the buckling design. In the reported studies, the film parameters were regarded as deterministic. However, the geometrical and physi…
변압기 내부에서 발생한 열의 냉각과 절연의 목적으로 채워지는 전기절연유는 광유가 널리 이용되고 있지만, 유출 시야기되는 환경오염 문제와 열적 불안정성 등의 문제가 있다. 친환경적이고 넓은 온도 범위에서 사용 가능한 전기절연유를 합성하기 위해, 디글리세롤과 두 종류의 지방산을 반응시켜 diglycerol ester를 합성하였다. 서로 다른 특성을 가진 올레산과 카프릴산의 몰비에 따른 절연특성을 분석한 결과, 지방산의 몰비가 Oleic acid:Caprylic acid = 1:3일 때 유동점은 $-50^{\circ}C$ , 인화점은 $306^{\circ}C$ 로 가장…
Nine bauxite samples from Brazil and one from Ghana were submitted to alkaline digestion at 145°C. All initial samples and their red muds were chemically analysed and characterised by X-ray diffraction and Mössbauer spectroscopy at 298 and 77 K. The settling rates of all red muds were also measured. It was observed th…
Introduction: Mitral valve regurgitation represents the second major valvular disorder in the western world, whereas current strategies for mitral valve reconstruction are imperfect. The aim of this study was to develop a tissue engineered substitute for mitral valve leaflet reconstruction using acellular porcine peri…
Steroidal saponin: (1β,3β,5β,25S)-spirostan-1,3-diol1-[α-L-rhamnopyranosyl-(1→2)-β-D-xylopyranoside] (RCE-4) is the most abundant and bioactive members in Reineckia carnea, has been reported to possess antiinflammatory activity, but the underlying mechanisms remain largely unknown. The present aim was to study express…
The experimental performance evaluation of a cylindrical steam reformer with various thermal conditions has been conducted. The bottom space of the cylindrical reactor was packed with Ruthenium (Ru) catalyst. A three-segment furnace was installed to create the axially variable boundary temperature distribution. Six K-…
A facile, industrially viable, one-pot synthesis of 0.5-8 wt% Pt supported on 22 mol% Al-modified ana-tase with high surface area and thermal stability is presented. Four pathways were studied to deter-mine the effects of support properties on catalyst dispersion, and the highest dispersions were observed for high sur…
Giant magnetostrictive actuator (GMA) is a new type of vibration control driving device. Since it has a lot of nonlinear, its performance model has been can't descrip good. This paper describes the self-made physical design of GMA, develop the GMA performance research experiment. For different excitation voltage, GMA…