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Noise Figure in Near-Infrared Amorphous and Mid-Infrared Crystalline Silicon Optical

Jichi Ma、Sasan Fathpour2013-01-01OpenAlex

The noise figures (NF) of near-infrared (near-IR) amorphous silicon (a-Si) and mid-infrared (mid-IR) crystalline sil- icon (c-Si) optical parametric amplifiers (OPA) are numerically investigated. The impact of nonlinear losses, i.e., two-photon ab- sorption (TPA) and TPA-induced free carrier absorption (FCA), as well…

Photonic and Optical DevicesAdvanced Fiber Laser TechnologiesSilicon Nanostructures and Photoluminescence

Discussion from the September-October 2012 ACI Materials Journal

Helarisi Abeyruwan2013-01-01ACI Materials Journal

First Name is required invalid characters Last Name is required invalid characters Email Address is required Invalid Email Address Please select a country... Afghanistan Åland Islands Albania Algeria American Samoa Andorra Angola Anguilla Antarctica Antigua And Barbuda Argentina Armenia Aruba Australia Austria Azerbai…

Metallurgical and Alloy ProcessesAdvanced ceramic materials synthesisMaterial Selection and Properties

SiC对MgO-CaO-C耐火材料抗氧化性能的影响

何龙、王玺堂、王周福 等 6 位作者2013-01-01Acta Scientiarum Naturalium Universitatis Sunyatseni

以SiC为抗氧化剂添加至MgO-CaO-C耐火材料中,研究了SiC对提高MgO-CaO-C耐火材料抗氧化性能的作用及抗氧化机理。通过TG-DSC、XRD、显气孔率测定以及近似计算氧化层面积等进行分析和鉴定。结果表明：加入SiC后MgO-CaO-C耐火材料的抗氧化性能得到显著提高,结构更加致密。材料中SiC大约在1210℃开始与氧气反应,反应后生成的SiO2继续和MgO反应生成镁橄榄石,从而填充气孔形成致密氧化层阻止碳的进一步氧化。

Magnesium Oxide Properties and ApplicationsHigh-Temperature Coating BehaviorsAdvanced ceramic materials synthesis

光降解对DOM与Cu2＋、pb2＋结合能力的影响

范晓明、李先国、邹惠玲 等 4 位作者2013-01-01Acta Scientiarum Naturalium Universitatis Sunyatseni

以氙灯为光源，通过平衡渗析法研究了美国萨旺尼河DOM在光解过程中，DOM与重金属离子（Cu2＋、Pb2＋）结合系数的变化。研究表明，DOM光照过程中，氧气对DOM起到促进作用。氧气充足条件下，将使DOM更大程度上发生光解。经过72小时照射，空气饱和和空气平衡状态下，DOM与Cu2＋结合系数分别由1．33下降到0．70和0．62，DOM与Pb2＋结合系数分别由0．14下降到0．09和0．05。光降解使更多的金属离子由与DOM的结合态转变为自由态。

Copper Interconnects and ReliabilityGold and Silver Nanoparticles Synthesis and ApplicationsMolecular Sensors and Ion Detection

Optimal design and fabrication method for antireflection coatings for P-polarized 193 nm laser beam at large angles of incidence (68 degrees-74 degrees)

Juntae Jin、Cheng‐Bin Jin、C Li 等 5 位作者2013-01-01OpenAlex

Most of the optical axes in modern systems are bent for optomechanical considerations. Antireflection (AR) coatings for polarized light at oblique incidence are widely used in optical surfaces like prisms or multiform lenses to suppress undesirable reflections. The optimal design and fabrication method for AR coatings…

Surface Roughness and Optical MeasurementsOptical Coatings and GratingsAdvanced optical system design

La0.70Ca0.30–xSrxMnO3薄膜的制备及磁卡效应

冯明、刘鑫鑫、Liu Jie 等 5 位作者2013-01-01OpenAlex

采用溶胶–凝胶旋涂法在Si基片上生长La0.70Ca0.30–x Srx MnO3(x=0,0.05,0.10,0.15)薄膜材料。利用X射线衍射仪、原子力显微镜、场发射扫描电子显微镜和振动样品磁强计对薄膜的结构、形貌、膜厚、Curie温度和磁卡效应进行了研究。分析了Sr含量对薄膜磁性能和磁卡效应的影响。结果表明,薄膜为单相正交钙钛矿结构,薄膜表面平整致密,均方根粗糙度约为2.3 nm,薄膜厚度约为260 nm。在室温条件下,随Sr含量增加,薄膜的磁性由顺磁性转变为铁磁性,Curie温度和最大磁熵变均向高温移动。当x=0.15时,薄膜在299 K时的最大磁熵变达到16.04 mJ/(cm3 K),有较好的室温应用前景。

Magnetic and transport properties of perovskites and related materialsMagnetic Properties of AlloysMetallic Glasses and Amorphous Alloys

New Test Method for Measuring Friction Characteristics Between Asphalt Mixtures and Steel

Josef Žák、Jan Valentin2013-01-01Proceedings of the international conferences on the bearing capacity of roads, railways and airfields

Friction between the steel parts of test device and the tested specimen occurs in many hot mix asphalt test methods. The paper deals with new device called Cylindrical Tribometr used for testing the friction characteristics between steel and hot mix asphalts developed at CTU in Prague. Evidence established by Cylindri…

Asphalt Pavement Performance EvaluationMaterial Properties and Failure MechanismsTribology and Wear Analysis

D190V点突变提高华根霉Rhizopus chinensis CCTCC M201021脂肪酶的最适温度和热稳定性

吴厚军、喻晓蔚、沙冲 等 4 位作者2013-01-01Acta Scientiarum Naturalium Universitatis Sunyatseni

【目的】对来源于Rhizopus chinensis CCTCC M201021的脂肪酶进行了D190V定点突变, 提高该酶的最适温度和热稳定性。【方法】对毕赤酵母表达的突变酶D190V与野生型酶r27RCL进行酶学性质比较。【结果】D190V的最适温度比r27RCL高5 ℃, 65 ℃下的半衰期提高了一倍, 在其他性质方面, 突变酶D190V与r27RCL基本相似。【结论】通过结构分析表明, 定点突变D190V提高该酶稳定性的主要原因可能在于提高了突变位点所在的α螺旋的稳定性以及增强了稳定蛋白质结构的氢键作用力。

Enzyme Structure and FunctionLipid metabolism and biosynthesisFungal and yeast genetics research

Effects and mechanism of graft modification on the dielectric performance of polymer–matrix composites

赖茂柏、于淑会、孙蓉 等 6 位作者2013-01-01OpenAlex

With the development of electronics industry, polymeric dielectric materials with high energy storage density have become increasingly important for the miniaturization of electronic components. In this research work, enhanced permittivity was obtained by graft modification of the epoxy resin matrix. Polyethylene glyc…

Dielectric materials and actuatorsSynthesis and properties of polymersAdvanced Sensor and Energy Harvesting Materials

Г. Ю. Александрова (асп.) 1 , К. Г. Алексанян (н.с.) 2 , И. И. Меньшова (н.с.) 2 Влияние разобщающей группы на цвет и свойства азокрасителей

K. G. Aleksanyan、A. N. Kosygina2013-01-01CyberLeninK (CyberLeninka)

Moskovskij Gosudarstvennyj Tekstil’nyj University im. A. N. Kosygina, 1, Malaja Kaluzskaja Str., 119991, Moscow; email: alkarine@mail.ruКрасители обладают способностью интенсивно поглощать и преобразовывать энергиюэлектромагнитных излучений (световую энергию) в видимые и ближние ультрафиолетовыеи инфракрасные области…

Pigment Synthesis and PropertiesLiquid Crystal Research AdvancementsNanomaterials and Printing Technologies

Investigations of the Structural and Electron Field Emission Properties of Ultrananocrystalline Diamond Films

沙克倫2013-01-01清華大學材料科學工程學系學位論文

Growth, microstructural evolution and electron field emission (EFE) properties of ultrananocrystalline diamond (UNCD) films are investigated in this research work. Initially, we focus on understanding the role of hydrogen in diamond films grown in Ar/H2/CH4 plasma. The factors leading to a transition of diamond grain…

Diamond and Carbon-based Materials ResearchMetal and Thin Film MechanicsIon-surface interactions and analysis

Schichtdesign unter Berücksichtigung von optischen und mechanischen Eigenschaften

Gödeker, Christoph2013-01-01Common Library Network (Der Gemeinsame Bibliotheksverbund)

Mechanischer Verschleiß ist ein wesentlicher Faktor welcher die Lebensdauer \noptischer Beschichtungen beschränkt. Im Rahmen dieser Arbeit wurden verschiedene \nMöglichkeiten untersucht, durch gezielte Auswahl der Schichtmaterialien und \nAnpassungen des Schichtdesigns die mechanische Belastbarkeit optischer \nBeschic…

Advanced ceramic materials synthesisAdvanced Surface Polishing TechniquesMetal and Thin Film Mechanics

Sr掺杂对LaCoO_3/γ-Al_2O_3催化剂结构和性能的影响

赵文怡、许延辉、孟志军 等 5 位作者2013-01-01Acta Scientiarum Naturalium Universitatis Sunyatseni

采用过饱和溶液浸渍法，在不同焙烧温度下制备了LaCoO3／γ-A12O3煤蝇a0.8Sr0.2CoO3/γ-A12O3催化剂并对其活性进行测试，利用XRD、BET等技术对样品进行了表征。焙烧温度〈600℃，催化剂样品的比表面积相对较大，活性组分在载体A12O3上分散度高，从而具有较高的活性，并且用sr部分取代La制得La0.8Sr0.2CoO3/γA12O3催化剂中，sr的加入有助于钙钛矿的形成，可以促进催化活性的提高；焙烧温度≥600℃，催化剂样品的比表面积呈下降趋势，在载体A12O3上所负载的LaC003或La0.8Sr0.2CoO3由于烧结而长大，造成分散度下降，催化活性变差，掺人sr未能提高催化剂对甲苯的催化氧化活性，甚至…

Iron and Steelmaking ProcessesIndustrial Gas Emission ControlCatalytic Processes in Materials Science

γ-BL/TEP混合溶剂对PVDF膜结构和性能的影响

张文娟、Lei Wang、孟晓荣 等 5 位作者2013-01-01水处理技术

通过溶解度参数预测，膜渗透性能检测，及扫描电镜（SEM）对膜形貌观察，考察了聚偏氟乙烯（PVDF）在γ-丁内酯（γ-BL）、磷酸三乙酯（TEP）为混合溶剂，乙二醇（EG）、N，N-二甲基乙酰胺（DMAc）及其混合物为凝固浴时，相转化条件及溶剂配比对PVDF膜在孔隙率、纯水通量、BSA截留率，以及拉伸强度等性能方面的影响行为。结果表明，随混合溶剂中TEP质量分数的增加，凝胶浴中溶剂DMAc质量分数增大，PVDF膜皮层逐渐变薄，PVDF结晶球粒粒径变小，孔隙率增加，拉伸强度下降。当混合溶剂中TEP的质量分数为60％，凝胶浴DMAc含量30％时，膜纯水通量达2100L／（m2．h），BSA截留率仍保持58．7％，具有良好的超滤性能，可作…

Electrowetting and Microfluidic TechnologiesPolymer Science and PVCSurface Modification and Superhydrophobicity

Synthesis and Defoaming Properties of Amino Polyether-Modified Silicones from Hydrogen Silicone, Allyl Glycidyl Ether and Polyether Amines *

Donghui Zhang、Songlin Zhang、Huijun Fan 等 5 位作者2013-01-01OpenAlex

We report herein the synthesis and defoaming ability of one kind of modified silicones by employing poly- ether amine compound as the source of both amino and polyether motifs. The synthetic route starts with hydrogen sili- cone and consists of two major steps: hydrosilylation and ring-opening nucleophilic addition. H…

biodegradable polymer synthesis and propertiesPickering emulsions and particle stabilizationAdvanced Polymer Synthesis and Characterization

Progress of Cathode Material and Electrolyte in Non-aqueous Li-Air Battery

Yang Fy、Zhang Ll、Xu Jj 等 6 位作者2013-01-01OpenAlex

A Li-air battery could provide much higher energy density than conventional lithium-ion battery, which is comparable to gasoline and, thus, many attentions have been paid to the Li-air battery in recent years. This paper summarizes the latest development of the cathode material and electrolyte in the non-aqueous Li-ai…

Supercapacitor Materials and FabricationAdvanced Battery Materials and TechnologiesAdvanced Battery Technologies Research

PREPARATION AND BEHAVIOR OF AMINO-CONTAINING SULFONATED POLY(ARYL ETHER KETONE SULFONE) CROSSLINKED MEMBRANES FOR PEMFC

Xu Jm、Yunlong Zhao、Cheng Hl 等 8 位作者2013-01-01OpenAlex

The sulfonated poly (aryl ether ketone sulfone) copolymers bearing pendant amino groups were synthesized by nucleophilic polycondensation method in this paper. The C-Am-SPAEKS crosslinked membrane was obtained by a heating reaction at 180 degrees C. The FTIR spectrum and H-1-NMR spectrum showed that the amino group ha…

Conducting polymers and applicationsMembrane-based Ion Separation TechniquesFuel Cells and Related Materials

生物合金Mg-4Zn-1Ca在模拟体液中腐蚀性能的研究

李云、马莹2013-01-01铸造技术

采用真空气氛保护金属型制备Mg-4Zn-1Caj元合金，利用光学显微镜、扫描电子显微镜、浸泡腐蚀失重试验研究了铸态Mg-4Zn-1Ca合金在模拟体液中的腐蚀行为。结果表明，Mg-4Zn-1Ca合金的腐蚀速率随着时间的延长而降低，并观察到在60min时氧化膜丧失保护能力。经过5h浸泡后，铸态合金的平均腐蚀速率从最高的10．91mm／a下降到了4．447mm／a。

Magnesium Alloys: Properties and ApplicationsMagnesium Oxide Properties and ApplicationsCorrosion Behavior and Inhibition