Materials Literature
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利用Gleeble-1500D热模拟试验机,采用高温等温压缩试验,对Cu-0.4Cr-0.15Zr-0.04Y合金在应变速率为0.001~10 s-1、变形温度为650~850℃、最大变形程度为50%条件下的动态再结晶行为以及组织转变进行了研究。利用加工硬化率和应变（θ-e）的关系曲线确定了该合金发生动态再结晶的形变条件为T≥750℃,应变速率小于0.1 s-1;根据θ-σ模型,确立了合金变形特征参数之间的关系：σc/σp=0.86,ec/ep=0.30;同时建立了合金变形特征参数与Z参数的关系：ep=2.61×10-3Z0.14,ec=7.83×10-4Z0.14。Cu-0.4Cr-0.15Zr-0.04Y合金在热变形过程中的动…
采用微波溶剂热法—浸渍法制备了WO3/γ-Bi2MoO6纳米异质结复合可见光催化剂（简称光催化剂）,用XRD、SEM、XPS和UV-Vis分光光度法对其进行了表征.以甲基橙为目标降解物,考察了光催化剂的催化性能.表征结果显示：WO3分散在γ-Bi2MoO6晶体表面,未进入晶格内部;与WO3和γ-Bi2MoO6相比,WO3/γ-Bi2MoO6在紫外和可见光区的吸收强度均有所提高,且对光的吸收发生了明显的红移,禁带宽度变窄;二者形成的p-n型异质结能及时有效地促进光生电子-空穴对的分离,提高催化活性.实验结果表明：WO3/γ-Bi2MoO6的催化活性优于WO3和γ-Bi2MoO6;在甲基橙溶液初始质量浓度为10 mg/L、光催化剂WO…
以氟橡胶（FMK）和硅橡胶（MVQ）为基体,用玄武岩短纤维作增强相制备了玄武岩短纤维/MVQ/FMK复合材料,研究了MVQ/FMK的最佳并用比,玄武岩短纤维的长径比、用量及表面处理,二段硫化条件对复合材料力学性能的影响,用扫描电镜（SEM）和红外光谱（IR）分析表征了玄武岩短纤维和FMK/MVQ的相容性.结果表明,MVQ/FMK（质量比）为10/90时,并用胶的力学性能最好,使用长径比为1800的玄武岩短纤维7份时,玄武岩短纤维/MVQ/FMK复合材料的力学性能最佳,最佳的二段硫化条件是200℃×6h.SEM和IR分析得出γ-巯丙基三甲基硅烷（KH-590）、双（γ-三乙氧基硅基丙基）四硫化物（Si69）在玄武岩短纤维表面发生了明…
Lithium ion batteries are the current technology of choice for electric vehicles due to their light weight, high volumetric and gravimetric energy density, low selfdischarge rate, quick charge acceptance, excellent cycle life and wide operating temperature range. However the current manufacturing process requires the…
Marine pelagic diatoms are coined to be strong drivers of the Southern Oceans silicate pump. Their growth and sinking dynamics substantially affect silicate supply in lower latitude surface water masses of the world ocean. We have explored the use of species distribution models (SDM) to investigate the potential respo…
通过溶胶-凝胶和高温固相掺杂反应可控合成了形貌均匀、结晶性好的尖晶石型Li Mn1.9Al0.1O3.95F0.05正极材料,探究了Al部分取代Mn、F部分取代O后对结构的影响,测试并比较了电极材料的倍率性能和循环充放电性能.结果表明,尖晶石型Li Mn1.9Al0.1O3.95F0.05和Li Mn2O4有同样的晶型,但电极较传统的Li Mn2O4电极倍率稳定性有显著提高.在连续混合（如0.1C、0.5C和1C）充放电150次后,Li Mn1.9Al0.1O3.95F0.05电极的容量仍能保持90%以上.
The use of extremely high hardness and light weight ceramic-based materials against ballistic threat is gaining popularity over the recent years. However, ceramics materials are often susceptible to tensile cracking and fragmentation due to its inherent brittleness which affects its performance as a protective materia…
据《Gas Turbine World》2013年11—12月刊报道，Pratt＆Whitney Power Systems已与阿尔及利亚SPE公司签订合同，为阿尔及利亚提供20台FT8 Mobile Pac。
This thesis describes the synthesis and characterisation of conjugated materials, and their optoelectronic applications. The first chapter introduces the concept of solar cells and describes the most common types of solar cells used nowadays, including examples of some of the best performing materials. The second chap…
In this present work, CTH and BCTH crystals have been prepared by gel technique by using single diffusion method at room temperature. The as grown crystals were characterized by using XRD, FT-IR, UV, TG / DTA and Micro hardness studies. X-ray powder diffraction results analyzed by using suitable software suggest that…
Congreso celebrado en la Escuela de Arquitectura de la Universidad de Sevilla desde el 24 hasta el 26 de junio de 2015.
The analysis of the surface of the quartz plates after various treatments. Quartz crystal elements have been previously processed by mechanical polishing using abrasive slurry and chemical etching. Suspension of abrasive ceria serves micropowder, chemical etching is performed using hydrofluoric acid. Investigation of…
In this investigation we use two complementary techniques to distinguish between superparamagnetic blocking (SPB) and superspin-glass (SSG) freezing phenomena in magnetite nanoparticles. While these manifestations of the superspin dynamics are fundamentally different, they have similar "signatures", especially in dc-m…
采用共沉淀法结合高温固相法制备Li1.07（Ni0.4Mn0.53）1-xAlx O2正极材料,利用SEM,XRD对所得试样的形貌和晶体结构进行表征,并研究材料的电化学性能.结果表明,少量Al的掺入减小材料的颗粒尺寸,降低材料的放电比容量,但可以提高材料的循环稳定性和倍率性能.其中x=0.01时所得试样在25℃,2.75--4.2 V,0.5 C倍率下的首次放电比容量为125.1 m Ah/g,100次循环后的容量保持率达到99.5%.此外,掺入适量Al后可以降低Li＋在材料中的电荷传递阻抗,改善材料的低温放电性能.
三环己基氢氧化锡分别与辛二酸和壬二酸进行甲醇溶剂热反应,合成了2个双（三环已基锡）二元酸酯（CH2）n（CO2Sn Cy3）2[（n：6（1）,7（2）],并用IR、1H和13C NMR、元素分析和X射线单晶衍射表征结构。化合物1、2均属单斜晶系,空间群分别为P21/n和P21/c,在化合物的晶体中,1通过Sn-O共价键,2通过Sn-O和Sn…O弱作用,分别形成了四锡核30元（1）和32元（2）二维大环网状结构。化合物1、2对人癌细胞Colo205、Hep G2、MCF-7、Hela、NCI-H460均具有良好的体外抑制活性,对S.Aureus、B.Subtilis、E.Coli和S.Typhi具有选择性的抑菌作用。
目的：使用线性离子阱傅立叶转换串联质谱仪，对丹参中丹酚酸A和B进行多级裂解分析，探析其裂解规律。方法：采用进样针直接进样的方法，使用碰撞诱导解离（CID）裂解模式，对丹酚酸A和B进行多级裂解分析，Xcalibar V2.0进行数据分析，对碎片离子分子式推导，偏差设置为20。对两个化合物的裂解进行初步分析，全扫描及多级碎裂扫描的分辨率为30 000，多级碎裂模式为CID，碎裂能为35%。结果：丹酚酸类化合物在多级碎裂中，主要表现为丹参素基的丢失，且CO和H2O的丢失也较为明显。结论：本研究使用LTQ-Orbitrap高分辨质谱对两个化合物裂解途径进行分析，探讨其可能的裂解规律，为快速对中药材中该化合物的鉴别及其代谢物的鉴别提供实验数…
This research was supported by the Undergraduate Research Opportunities Program (UROP).
PART I. Synthesis and Characterization of Novel Metal-Citrate Complexes and the Investigation of Metal-Citrate Transporters in Gram-Positive Bacteria Abstract. Syntheses of new barium, cadmium, calcium, cobalt, iron, lead, magnesium, manganese, nickel, and strontium citrate complexes have been attempted using differen…
Studying of graphene like 2D materials is very intense and it is very likely to remain as one of the frontier research areas in materials sciences. Transferring of 2D materials onto target samples or substrates is essential for fundamental studies and potential applications. Conventional transfer technique usually inv…
利用1-（2-吡啶偶氮）-2-萘酚（PAN）与镓反应生成红色络合物的特性,建立了光度法测定钒钛磁铁矿中镓的方法。实验表明：于25mL比色管中,依次加入2.0mL KHP-HCl缓冲溶液（pH 3.2）、4.0mL 0.5g/L PAN溶液、3.0mL 95%乙醇,用水定容后反应10min,用1cm比色皿,于545nm处采用分光光度法进行测定,镓（Ⅲ）的质量浓度在0.05-3μg/mL范围内符合比尔定律,方法检出限为0.033μg/mL,表观摩尔吸收系数e=3.0×10^4 L·mol^-1·cm^-1。将GBW 07226a钒钛磁铁矿精矿一号和GBW 07224钒钛磁铁矿原矿一号样品经氢氧化钠和过氧化钠碱熔、水浸取、过滤、酸化还原…