周蓁宜2013-01-01成功大學化學工程學系學位論文
Polyfluorene containing functional phosphonate pendent groups (PF-EP) was synthesized, from which the pendent phosphonate groups was partially hydrolyzed (with potassium as counter ion) to prepare PF-EPK for application as electron-injection layer in polymer light-emitting diodes (PLEDs). The amount of hydrolysis was…
Organic Electronics and PhotovoltaicsConducting polymers and applicationsOrganic Light-Emitting Diodes Research
Peter Groche、Vinzent Monnerjahn、Manuel Steitz 等 4 位作者2013-01-01wt Werkstattstechnik online
Hersteller walzprofilierter Kaltprofile müssen hohe Anforderungen an die Oberflächenbeschaffenheit ihrer Profile erfüllen. Die Profilober - flächen werden insbesondere von den Walzenoberflächen beeinflusst. Eine konventionelle Fertigung der Profilierrollen sieht eine zerspanende Bearbeitung vor, wobei Dreh- und Schlei…
Metal Forming Simulation TechniquesMetal Alloys Wear and PropertiesMetallurgy and Material Forming
于洪娇、刘桂霞、王进贤 等 6 位作者2013-01-01Acta Scientiarum Naturalium Universitatis Sunyatseni
采用精氨酸辅助水热法,通过调节RE3+和F-源的摩尔比制备出亚微米级六棱柱形13-NaGdF4:Eu3+发光材料,用XRD、FESEM、EDS和荧光光谱对样品的形貌、结构和发光性能进行了表征。结果表明:随着F-源量的增加,样品由空心结构变成实心结构。当RE3+:F-=1:8时制得的表面光滑均匀的NaGdF4:Eu3+空心六棱柱的发光强度最强。以Eu3+的5F0→7F2 跃迁占据主导地位,说明Eu3+占据NaGdF4非对称的1a格位和非对称的1f格位。
Inorganic Fluorides and Related CompoundsLuminescence Properties of Advanced MaterialsAdvanced Sensor and Energy Harvesting Materials
张首才、李惠茹、庄茜2013-01-01广州化工
用皮考林酰肼与乙酰二茂铁反应合成皮考林酰腙缩乙酰二茂铁Schiff碱。将其与无水乙酸钴反应合成皮考林酰腙缩乙酰二茂铁Schiff碱Co(Ⅱ)配合物。通过元素分析、飞行时间串联质谱、核磁共振氢谱等手段对其进行了表征,发现配合物Schiff碱配体中的亚氨基氮原子及羰基中的氧原子与Co(Ⅱ)配位,同时配合物分子中有水分子存在使配合物形成六配位的八面体结构。
Porphyrin and Phthalocyanine ChemistryMagnetism in coordination complexesOrganic Chemistry Cycloaddition Reactions
连景宝、桑晓彤、王秉新2013-01-01Acta Scientiarum Naturalium Universitatis Sunyatseni
以La2O3、Eu2O3和H2SO4为原料,NH3·H2O为沉淀剂,采用共沉淀法合成了La2O2SO4:Eu3+荧光粉。结果表明pH值对前驱体及其煅烧产物的物相组成有很大影响,适合的pH值为10。该pH值合成的前驱体L.d,(OH)4SO4·2H2O在空气气氛下400℃煅烧2h能转化为团絮状的单相La2O2SO4粉体。在280nm的紫外光激发下,La2O2SO4:Eu3+荧光粉呈现红光发射,主发射峰位于620nm,归属于Eu3+离子的^5D0-^7F2跃进,Eu^3+离子的淬灭浓度为10mol%,并且随着煅烧温度的升高,该荧光粉的发光强度增加。
Pigment Synthesis and PropertiesNuclear materials and radiation effectsLuminescence Properties of Advanced Materials
孙明燕、张朝晖、杨瑞 等 5 位作者2013-01-01北京理工大学学报:英文版
The effects of interface shape on stress wave distribution and attenuation were investigated using finite element method(FEM).The simulation results indicate that when the stress wave propagates from SiC ceramic to Al alloy,the tensile stress decreases and the attenuation coefficient of the stress wave increases with…
Advanced Surface Polishing TechniquesAluminum Alloys Composites PropertiesAdvanced ceramic materials synthesis
齐同喜、齐蕾2013-01-01Acta Scientiarum Naturalium Universitatis Sunyatseni
将有序介孔碳(OMC)分散于壳聚糖(CTS)溶液,并用于修饰玻碳电极,制成有序介孔碳一壳聚糖修饰玻碳电极(OMC—CTS/GCE),用差分脉冲溶出伏安法研究锡(Ⅱ)在该电极上的溶出伏安特性。实验发现,在1.0mol/L盐酸中,锡(Ⅱ)在一1.2V处被富集在修饰电极表面,在0.0~+1.0V电位范围,以100mV/s的速率扫描,锡(Ⅱ)在+0.35V处产生一灵敏的溶出峰,峰电流与锡(Ⅱ)的浓度在5.0×10-8~1.0×10-5mol/L范围内呈良好的线性关系,检出限(S/N一3)为2.2×10~-9mol/L。方法用于合金中痕量锡(Ⅱ)的测定,结果同火焰原子吸收光谱法(FAAS)测定结果一致。
Electron and X-Ray Spectroscopy TechniquesPower Transformer Diagnostics and InsulationElectrochemical Analysis and Applications
Berend DenkenaHenning Windhagen2013-01-01OpenAlex
The clinical application of degradable ortho- pedic magnesium implants is a tangible vision in medical science. This interdisciplinary review discusses many dif- ferent aspects of magnesium alloys comprising the manu- facturing process and the latest research. We present the challenges of the manufacturing process of…
Orthopaedic implants and arthroplastySurface Treatment and CoatingsMagnesium Alloys: Properties and Applications
何代澄、陈云贵、肖素芬 等 7 位作者2013-01-01特种铸造及有色合金
通过XRD、SEM、EDS分析以及拉伸试验等手段,研究了铸态Mg-6Zn-0.7Zr-xSn(x=0,0.5,1,2,3)合金的显微组织和力学性能。结果表明,Mg-6Zn-0.7Zr合金中的Sn主要有3种存在形式:固溶于α-Mg基体、形成Mg2Sn相、少量固溶于MgZn相;Sn的添加可细化MgZn离异共晶相,但粗化了α-Mg枝晶,表明含Sn镁合金中不适合添加Zr元素;少量Sn的添加可以改善Mg-6Zn-0.7Zr合金的强度。当Sn含量为0.5%时,合金铸态的抗拉强度和伸长率分别为242MPa和17%;当Sn含量达到3%以后,合金拉伸断口形貌中存在大量的解理台阶面和河流状花样,合金脆性增大。
Aluminum Alloys Composites PropertiesMagnesium Alloys: Properties and ApplicationsMetal and Thin Film Mechanics
Yang Liu、高巍、Qiang Wang2013-01-01Acta Scientiarum Naturalium Universitatis Sunyatseni
报道了利用镍(Ⅱ)-硫醇阴离子配合物[Ni-(S)4]和Fe3(CO)12反应制备有机硫配体桥联的多核Ni—Fe:配合物[Ni{(C6H4s2)2(CH3)3}(μ-s,S’)Fe2(CO)6]和[Ni{(CH3C6H3S2)2(C3OH)}(μ-s,S’)Fe2(CO)6]。其中后者中引入了羟基功能化基团,以便将其负载到改性的电极材料上研究其还原产物的电催化性能。通过核磁共振、红外、质谱和晶体结构测定等手段对相关化合物进行了表征。
Metalloenzymes and iron-sulfur proteinsOrganic and Molecular Conductors ResearchMagnetism in coordination complexes
彭陈亮、闵凡飞、李宏亮2013-01-01中国矿业大学学报
高岭石颗粒因表面荷电稳定分散在煤泥水中难以沉降,水溶液中Ca^2+浓度及pH值对高岭石颗粒表面Zeta电位影响较大.基于高岭石不同断面的不同荷电机理,选择高岭石不同断面的晶胞数为权重,得到了颗粒表面总Zeta电位模型,并进行了模拟计算,利用拟合对该模型进行校正.采用电泳法测定了不同Ca^2+浓度及不同pH值下高岭石颗粒的Zeta电位,并与模拟值进行了比较,结果表明:当溶液中Ca^2+浓度大于等于25mg/L时,模型能够有效的预测高岭石表面的Zeta电位,最大偏差为1.368mV;当溶液中Ca2+浓度小于25mg/L的溶液中,由于Helm-holtz内层负电荷吸附量变化,预测精度降低.当溶液中pH值小于等于9时,模型能够有效的预测高…
Calcium Carbonate Crystallization and InhibitionElectrokinetic Soil Remediation TechniquesMinerals Flotation and Separation Techniques
杜伯、王世雄2013-01-01中国石油和化工标准与质量
乙烯装置副产的裂解C9约含有150种组成[1],由于该裂解C9成分相当复杂,其各成分对合成石油树脂的影响还未见报道。本文通过改变轻C9中双环戊二烯的含量,考察对C9石油树脂色相、软化点等性能指标的影响,总结裂解C9重要组成的改变对石油树脂宏观性质的影响。
Polymer Science and PVCFullerene Chemistry and ApplicationsPhotopolymerization techniques and applications
郝艳玲、董明、刘昌宁2013-01-01Acta Scientiarum Naturalium Universitatis Sunyatseni
以铁氧化物对坡缕石粘土进行包覆改性,通过静态吸附实验研究了改性坡缕石吸附Cr(Ⅵ)的特性,探讨了吸附的动力学特征、吸附平衡、热力学参数和吸附机理.结果显示,改性坡缕石对Cr(Ⅵ)的吸附随溶液初始pH值的升高显著减弱,在初始pH值为4.0时,吸附90 min可达平衡,吸附过程能较好地符合pseudo-second-order动力学方程,速率常数k2随温度的升高增大,表观活化能为18.90 kJ/mol;吸附平衡能较好地符合Langmuir方程,吸附过程吸热,△H为28.29 kJ/mol,△G为-25~-20 kJ/mol,是物理吸附和化学吸附并存的过程.
Layered Double Hydroxides Synthesis and ApplicationsDielectric properties of ceramicsPigment Synthesis and Properties
李少兰、张立春2013-01-01半导体学报:英文版
Heterostructure light-emitting diodes(LEDs)were fabricated by growing ZnO nanorods and undoped ZnO films on p-GaN templates.The heterojunction showed a diode-like I–V characteristic and emitted electroluminescence(EL)peaks at 383 nm,402 nm,438 nm,and 507 nm under forward bias.Since the electrons from ZnO nanorods and…
ZnO doping and propertiesGaN-based semiconductor devices and materialsGa2O3 and related materials
Y. Chettat、M. Boumaour、S. Senouci 等 7 位作者2013-01-01EU PVSEC
In this work we have used an advanced high sensitivity and multi elementary analytical technique such Neutron Activation Analyses (NAA) in attempt to determine exactly which metallic impurities of the above mentioned elements, and with which concentrations, they are present in four different origin silicon nitride coa…
Silicon and Solar Cell TechnologiesAdvanced Surface Polishing TechniquesAdvanced ceramic materials synthesis
位晓茹、赵梅青、Zichuan Ma 等 4 位作者2013-01-01Acta Scientiarum Naturalium Universitatis Sunyatseni
采用KMnO4溶液在回流状态下对颗粒活性炭进行改性,得到新的改性炭。考察了高锰酸钾浓度、pH值、投加量、吸附时间对Cr(Ⅵ)去除率的影响,并测得吸附等温线。结果表明:改性炭对Cr(Ⅵ)的吸附在低pH值时效果更好,且当KMnO4浓度为0.03~0.04mol/L时,得到的改性炭吸附性能非常好;在pH值为4.0及25℃条件下,AC-3(吸附剂编号)对Cr(Ⅵ)的饱和吸附量比AC-0提高了11.6%;当温度由25℃升高到40℃时,AC-3对Cr(Ⅵ)的饱和吸附量提高了28.0%;改性炭对Cr(Ⅵ)的吸附作用符合Langmuir方程。
Magnesium Oxide Properties and ApplicationsIndustrial Gas Emission ControlGeochemistry and Elemental Analysis
金晶、曲秀娟、史忠丰 等 4 位作者2013-01-01辽宁师范大学学报:自然科学版
采用水热和溶剂热方法合成了2个Cu(Ⅱ)配合物:[Cu(C3H2O4)(phen)(H2O)]2·3H2O(1)和[Cu(inic)2(H2O)3]·H2O(2)(phen=邻菲啰啉;inic=异烟酸根).通过单晶X射线衍射、IR、UV-Vis-NIR吸收光谱、表面光电压光谱(SPS)对其进行了结构表征和物性测试.结构分析表明,2种配合物均为单核Cu(Ⅱ)配合物.配合物(1)中Cu(Ⅱ)离子为五配位,配位环境为畸变的四方锥构型;配合物(2)中Cu(Ⅱ)离子为五配位,配位微环境为畸变的四方锥构型.丰富的分子间氢键将它们网联成了2D配位超分子.2种配合物的SPS在300~800nm范围内都呈现出正的表面光伏响应,表明它们都具有一定的光…
Porphyrin and Phthalocyanine ChemistryNonlinear Optical Materials ResearchMetal-Organic Frameworks: Synthesis and Applications
黄建斌、宋智丽、陈增谋 等 4 位作者2013-01-01金属热处理
用正交试验法研究了铸造Si-Mn-Mo贝氏体钢的热处理软化和硬化工艺,通过化学成分分析、金相检验、力学性能分析及断口观察,探讨了影响铸造Si-Mn-Mo贝氏体钢冲击性能的主要因素。结果表明,控制非金属夹杂和疏松并采取合理的热处理工艺,Si-Mn-Mo贝氏体钢的抗拉强度可达1110 MPa,冲击韧度aKU可达112.7 J/cm2,完全满足中部槽的槽帮在煤矿井下恶劣工况条件下的使用要求。
Intermetallics and Advanced Alloy PropertiesMetallurgical and Alloy ProcessesMetallurgy and Material Science
A. Marcu2013-01-01OPen Access Repositorium der Universität Ulm (OPARU) (Ulm University)
This research was designed to meet Daimler systematic efforts to address future electromobility demands. The work focuses on developing potential cathode catalysts and tests procedures to be employed in prototype fuel cells. In order to achieve commercial cost-competitive polymer electrolyte membrane fuel cells (PEM F…
Fuel Cells and Related MaterialsCorrosion Behavior and InhibitionElectrocatalysts for Energy Conversion
Zhu Wang、张久兴、包黎红 等 5 位作者2013-01-01稀有金属材料与工程
采用高能球磨法制备出La0.6Eu0.4B6纳米粉体,将球磨后的纳米粉进行放电等离子(SPS)烧结,制备出了高致密的La0.6Eu0.4B6多晶块体材料。系统研究了烧结温度、烧结压力对样品致密度和力学性能的影响。结果表明,该方法与传统热压烧结方法相比有效降低了烧结温度,制备出的样品密度、维氏硬度和抗弯强度分别达到4.71 g/cm^3、23.37 GPa和295.14 MPa,这些值均高于传统热压烧结方法。热电子发射结果表明,当阴极温度为1873 K时,最大发射电流密度为33.74 A/cm^2。实验过程中还发现,在相同烧结工艺下,球磨纳米粉与粗粉相比,维氏硬度、抗弯强度和热电子发射电流密度分别提高了28%、58%和32%。因此,…
Intermetallics and Advanced Alloy PropertiesNuclear materials and radiation effectsAdvanced materials and composites