Materials Literature
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After a heat treatment, spheroidal graphite (SG) irons offer an efficient compromise between density and mechanical properties. Therefore, these SG irons, also called austempered ductile iron (ADI), are intended to substitute forged steels for the weight reduction of engine parts. Indeed, they combine strength, fractu…
The ultrafast mechanism of the hot electron thermalization in1D multilayer Si test devices could be visualized in its earliest stages by the one of the best ways (methods), i.e. time-resolved ultrafast reflectivity. The investigation allows examining the conditions of the feasibility of device exploiting the impact ge…
Transport properties of GaAs / δ – Mn / GaAs / InxGa1-xAs / GaAs structure with Mn δ – layer, which is separated from InxGa1-xAs quantum well (QW) by 3 nm thick GaAs spacer was investigated. This structure with high mobility was characterized by X-ray difractometry and reflectometry. Transport and electrical propertie…
This dissertation describes photoluminescence (PL) measurement and finite element thermal modeling to quantify optically induced surface heating of lead chalcogenide (IV-VI) semiconductor thin films and extract thermal conductivity for different superlattice (SL) materials. The results provide the first experimental e…
利用聚炳烯腈-醋酸乙烯作為一新穎膠化劑，膠化以3-甲氧基炳腈為基礎的液態電解質而製備高效能膠態電解質且應用於染料敏化太陽能電池(DSSCs)。該分子中的醋酸乙烯鏈段扮演著能讓共聚物溶解於電解質的角色;而丙烯腈鏈段則幫助交聯形成膠態結構。而此膠態電解質的導電度也因丙烯腈使碘化鋰及離子液體解離更完整，而使得與液態相近。此作用也造成TiO2的導帶稍微往正電位偏移。整體膠態DSSCs效率可達8.34%，幾乎有97%接近於液態電池的效率(8.6%) 然而，在組裝膠態DSSCs會遭遇的一個問題，即是電解質本身的高黏度造成相當難滲入具有中孔性的二氧化鈦電極；此問題在具有大工作面積的模組化電池更是顯而易見。因此利用聚炳烯腈-醋酸乙烯來膠化以乙腈為…
为了改善Fe-Mn富锂正极材料较差的循环性能,简化合成工艺,采用柠檬酸为螯合剂,溶胶凝胶法合成富锂正极材料0.7Li2MnO3·0.3LiFe2/3Ni1/3O2,并研究不同煅烧温度对于材料性质的影响。研究结果表明,550℃为最佳的煅烧温度,颗粒尺寸在50nm左右,在40mA/g初始放电容量可以达到179mAh/g,经过40次循环容量为166mAh/g。
ii Marilda Pereira Lisboa defended this dissertation on April 1, 2013. The members of the supervisory committee were:
Three series of molecules with new scaffold, in which two salicylaldimine groups are linked by an oxamide core, were studied. The synthesis, characterizations and mesogenic properties of these Schiff-base compounds and their dinuclear Co(II), Ni(II), Cu(II), and Zn(II) complexes is reported. The elemental analysis and…
Sorghum distillers dried grains with solubles (DDGS), canola and camelina meals are the main co-products resulting from grain-based ethanol or oil production.The main objective of this research was to study physicochemical properties of proteins isolated from DDGS, canola and camelina meals and their adhesion performa…
Chapter 1 gives a brief introduction to metallosupramolecular chemistry, silver(I) chemistry and the synthesis and coordination chemistry of pyridine mono-, di- and tri-N-oxides. Chapter 2 describes the syntheses of 17 [16 known and 1 new] pyridine N-oxides using either mCPBA or 50% H₂O₂ as the oxidising agent. It als…
나노여과막은 일반적으로 하전막이며, 용질의 하전성, 막과의 상호작용에 의해서 특징 있는 분리특성을 보인다. 본 연구에서는 나노여과막에 의한 폐수 중의 중금속류의 제거에 미치는 하전특성을 조사했다. 크롬(Cr), 철(Fe), 구리(Cu), 아연(Zn), 비소(As), 주석(Sn), 납(Pb)을 각각 0.1mg/L 첨가한 모의폐수를 제조하여 나노여과막(a)와 나노여과막(b)를 이용하여 운전압력 0.24MPa, 온도 25℃에서 여과실험을 수행하였다. 그 결과, 나노여과막(a)와 나노여과막(b)에 의한 염소 이온의 제거율은 12.8%, 3.5%였고, 황산이온의 제거율은 7…
Polylactide (PLA) composites with aluminum hydroxide (ATH) and branched siloxane polymer (BPS2) were prepared via direct melting compounding using a brabender. The limiting oxygen index (LOI) of the PLA composite with 25 wt% of ATH, and without BPS2, was about 31. Only V-2 rating (UL94 V) could be achieved. When a por…
The purpose of the paper was to study the influence of technological parameters of carbonitriding in macrodispersed powder on the properties of structural steel 40X. The problem was solved by finding the optimum temperature and time of treatment. For the estimation of the parameters, typical for the diffusion layers,…
2013年12月20日,Vishay Intertechnology,Inc.宣布,其Si7655DN-20 V P沟道GenⅢ功率MOSFET荣获EDN China 2013创新奖电源器件和模块类最佳产品奖。EDN China创新奖于2005年引入国内,以表彰在中国市场上的IC和相关产品在设计上所取得的成就。今年,共有82家公司的144款产品角逐9个技术门类的奖项。EDN China的在线读者投票选出73款提名产品,再由技术专家
The tin sensitization process has been used in electroless plating since 1940s Brenner and Riddell developed the electroless plating for surface metallization method. It was found to be an interesting topic to study tin sensitization for chemically controlling metal deposition on different substrates, because the tin…
Oxidative dehydrogenation (ODH) of 1-butene to butadiene (BD), which is a major building block in the petrochemical industry, is an attractive alternative to the current steam cracking of naphtha. Since the ODH of 1-butene is an exothermic reaction, it can be carried out at a lower temperature than the steam cracking…
This thesis deals with the synthesis and characterization of two carbazole-endcapped monomers, named as 2,8-di(carbazol-9-yl)dibenzothiophene (SCz) and 2,8-di(carbazol-9-yl)dibenzothiophene S,S-dioxide (SO2Cz), and their derived polymers PSCz and PSO2Cz prepared by both chemically oxidative coupling polymerization in…
采用传统固相反应法制备了La0．67Ba0．33Mn1-xZnxO3（O≤z≤0．2）多晶样品，系统研究了Zn掺杂对于多晶样品的结构，磁性和电输运性质的影响．XRD衍射表明样品均具有单一的立方钙钛矿结构．在外加磁场（H-10000e）环境中测得的磁化强度温度（M-T）曲线表明，在5-350K的温区内所有样品均发生了顺磁相（PM）到铁磁相（FM）的转变．样品的居里温度（Tc）和磁化强度随着Zn的掺杂量的增加呈现下降的趋势，当X=0．1时，样品的R和磁化强度与未掺杂的样品相比下降的幅度不大．但是当X=0．2时，样品的Tc和磁化强度都发生明显的下降．从零场（H-0T）和外加磁场（H=2T）下测得的电阻温度曲线可见，样品在测量的温区范围内…
The resolution of conventional optical lens system is limited by diffraction to about half-wavelength of the incident light. Plasmonic metamaterials, which rely on surface plasmons (SPs) to confine and transmit the electromagnetic (EM) energy, provide a way to circumvent the diffraction-limit. Over the past decades, m…
Dibenzo[de,mn]naphthacene annelated derivatives has been generated by nickel-catalyzed cyclodimerization. These structure which has been comfirmed by X-ray single-crystal diffraction analysis is non-planar and twist angle about 43.8-66.6o. The bond length and bond alternation in the crystal structures and HOMA theoret…