Gaussian Job Archive for C7H5ClO2
Archive of work produced using the resources of the Imperial College High Performance Computing Service.
Materials Literature
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放电等离子低温烧结h-BN-SiC复相陶瓷的结构与力学性能
以纳米h-BN和Si C粉为原料、B2O3为烧结助剂,利用放电等离子烧结(SPS)制备h-BN-Si C复相陶瓷,研究了烧结压力(20~50 MPa)对h-BN-Si C复相陶瓷结构与力学性能的影响。结果表明:在不同烧结压力下,h-BN-Si C复相陶瓷中h-BN晶粒的c轴倾向于平行压力方向,增大烧结压力能够提高复相陶瓷的致密化和力学性能,但较大的烧结压力(>40 MPa)降低了c轴倾向于平行压力方向的取向度和断裂韧性。在40 MPa烧结压力时获得了较佳的综合性能,复相陶瓷的相对密度、抗弯强度和断裂韧性分别达到98%、289.2 MPa和3.45 MPa·m1/2,比同条件制备的纯h-BN陶瓷的抗弯强度和断裂韧性分别提高了约138…
A New Three-dimensional Zn（II） Coordination Polymer Based on Trinuclear Zn（II） Units with a Three-fold Hex Topology
Under solvothermal conditions, a new trinuclear Zn(II) complex, [Zn3(bpdc)3(DPNDI)]· 3NMF(1, H2 bpdc = biphenyl-4,4-dicarboxylate, N,N-di(4-pyridyl)-1,4,5,8-naphthalenetetracarboxydiimide(DPNDI) and NMF = N-methylformamide), has been synthesized with mixed organic ligands. Complex 1 is of monoclinic, space group P21…
高熵合金Al7Mg3.6Cu1.2Zn7Ti1.2的制备与组织结构分析
用真空电磁感应炉制备了一种以Al、Mg、Zn、Cu、Ti等5种元素作为主元素,摩尔比为35：18：35：6：6的高熵合金。结果显示,合金以一种HCP相和一种FCC1相为主,另外出现了少量的FCC2相。Mg元素和Ti元素不会共存于同一相中,且Al元素和少量的Zn元素在晶间偏聚,形成离异共晶。经过压缩力学性能测试,制备的Al7Mg3.6Cu1.2Zn7Ti1.2合金虽然脆性较大,但抗压强度较高,可以达到572.89 MPa。
顺酐加氢制γ-丁内酯Cu-CeO_2-Al_2O_3催化剂失活与再生研究
采用共沉淀法制备了Cu-Ce O2-Al2O3（CCA）催化剂,用于顺酐（MA）常压气相加氢制γ-丁内酯（GBL）反应,表现了很好的催化性能,MA的转化率和GBL的选择性均达到100%,然而催化剂容易失活。采用扫描电子显微镜、热失重、N2O分解和X射线粉末衍射表征研究了CCA催化剂的失活原因和中间产物琥珀酸酐（SA）对CCA催化剂失活的影响,并考察了N2-air-H2法对CCA催化剂的再生效果;同时,通过设计试验对CCA催化剂上MA加氢制GBL反应历程进行了分析。结果表明：CCA催化剂的失活主要是由于表面沉积物的生成覆盖了催化剂表面活性位,而表面沉积物的生成与SA的浓度有关;通过N2-air-H2再生法能够完全恢复CCA催化剂的催…
Improved electrochemical kinetic performances of La-Mg-Ni-based hydrogen storage alloys with lanthanum partially substituted by yttrium
Yttrium(Y) has been used as the partial substitution element for lanthanum(La) to improve the electrochemical kinetic performances of La-Mg-Ni-based hydrogen storage alloys. La0.80–xYxMg0.20Ni2.85Mn0.10Co0.55Al0.10(x=0.00, 0.05 and 0.10) alloys were prepared by the inductive melting technique. The alloys were composed…
Критерии P-сверхразрешимости конечных групп
Пусть H – подгруппа конечной группы G. Будем говорить, что подгруппа H τ-квазинормальной в G, если H перестановочна с каждой силовской подгруппой Q из G, такой что (|H|, | Q|) = 1 и (|H|, | QG|) ≠ 1. Доказан следующий результат. Пусть G = AT, где A – холлова π-подгруппа группы G и T – p-нильпотентная подгруппа для нек…
超级电容器复合电极材料Ni（OH）2/GO的制备及其电化学性能研究
采用液相共沉淀法制备氢氧化镍/石墨烯（Ni（OH）2/GO）复合材料,通过电池测试系统检测对比Ni（OH）2与GO复合前后材料的电化学性能。测试结果表明,将Ni（OH）2与GO进行复合之后,复合材料的比电容达到141.3F·g^-1,循环100次后容量保持率为94.6%,较单一的Ni（OH）2有较大的提高。
Fabrication of PDMS and SU-8 Micro-Cantilevers for Studying the Biomechanics of Cardiomyocytes
It is essential to study the biomechanics of cardiomyocytes in vitro in order to develop drugs and diagnostic tools to treat cardiovascular diseases. Here a grooved and pegged micro-cantilever to observe and quantify the contractile behavior of cardiomyocytes was developed. The platform was based on muscular thin film…
The Progress of Funnelling Gun High Voltage Condition and Beam Test
A prototype of a high average current polarized electron funneling gun as an eRHIC injector has been built at BNL. The gun was assembled and tested at Stangenes Incorporated. Two beams were generated from GaAs photocathodes and combined by a switched combiner field. We observed the combined beams on a YAG crystal and…
Control of magnetic domains and domain walls by themal gradients
The aim of this work is to study heat effects in thin magnetic films to verify the theoretical prediction of domain wall motion towards a heat source. In the theory, a domain wall moves from a cold region towards the hotter part due to energy minimization processes. It is shown that no electron transport is necessary f…
FTIR Studies and Dielectric Properties of Cu Substituted Nano Crystalline Nickel-Zinc Ferrites Synthesized By Citrate-Gel Auto Combustion Technique
The nano crystalline Cu doped Ni-Zn ferrites having compositional formula Ni0.2CuxZn0.8-x Fe2O4 (where x=0.0, 0.2, 0.4, 0.6 and 0.8) were synthesized successfully by Citrate-Gel Auto Combustion method at a low temperature (180 0 C). Analysis of the X-Ray diffraction pattern of all the samples confirmed the formation o…
双核铜配合物[Cu2(foac)2(phen)2]·10H2O的合成与晶体结构
为进一步探索双核铜配合物的合成技术及结构特点，利用4-氟水杨酸（H2foac），1，10-邻菲罗啉（phen）与乙酸铜通过溶剂热合成方法合成了一个中心对称的双核铜配合物[Cu2（foac）：（phen）：]·10H20，对其进行了X射线单晶衍射仪、元素分析、红外光谱、紫外-可见光谱等分析测试。该配合物属于三斜晶系，P1空间群，晶胞参数n=0．67139（6）nm，b=1．14923（11）nm，c=1．44375（14）nm，OL=72．640（9）°，届=76．857（8）°，y=76．491（8）°。每个铜离子与2个配体foac的3个氧原子以及phen配体的2个氮原子配位形成四棱锥结构，通过分子问氢键作用构成一维链状结构，进一…
Characteristics of Magnesium-iron-aluminium Composite Oxides and Their Influence on Properties of Magnesia-based Bricks
The composition,structure and micro-morphology of magnesium- iron- aluminum composite oxides were investigated using various methods such as XRF,SEM,EDS,XRD and KMn O4-titration. Compared to hercynite,the composite oxides have completely different phases including solid solution( Mg O)0. 77( Fe O)0. 23,composite spine…
铕（III）-2-噻吩乙醛酸-红菲绕啉三元配合物的合成及发光性质
以2-噻吩乙醛酸（HL）为第一配体,红菲绕啉（Bath）为第二配体合成了一种新型Eu（Ⅲ）三元配合物.采用等离子体原子发射光谱（ICP）、元素分析、FT-IR和1 H NMR表征了配合物的组成及结构.通过热重（TG）和发光光谱研究了配合物的热稳定性与发光性能.结果表明,该配合物分子式为EuL3Bath·2H2O,具有良好的热稳定性.在最佳激发波长（270nm）的紫外光照射下,该配合物能发出Eu（Ⅲ）离子很强的特征红光,其中电偶极跃迁（5 D0→7F2,613nm）发射最强;此外,该配合物还表现出相对较长的衰减寿命（τ=1.17ms）.
复合基质发光材料Sr2YF7-3SiO2∶Tb3＋的结构和发光性能研究
采用溶胶—凝胶法制备了掺杂Tb3＋的复合材料Sr2YF7-3SiO2,通过IR、XRD、激发和发射光谱研究了材料的结构和发光性能.结构测试表明,在高于730℃时Sr2YF7-3SiO2∶Tb3＋三方晶体结构开始转变为硅酸盐,800℃退火处理后,材料以多种晶型结构存在;发光性能研究表明,基质Sr2YF7与SiO2的最佳配比为1∶3;最佳退火温度为800℃;样品在544nm监测波长下,最佳激发波长为378nm,Tb3＋的最佳掺杂摩尔浓度为9.00％（mol）.
锆助剂对CuO-ZnO-ZrO2/HZSM-5催化剂结构及性能的影响
以草酸为沉淀剂,采用悬浮共沉淀法制备CO2加氢一步合成二甲醚（DME）的双功能催化剂——Cu O-Zn O-Zr O2/HZSM-5.重点考察Zr O2对复合催化剂Cu O-Zn O-Zr O2/HZSM-5结构性能的影响,并采用XRD、BET、H2-TPR及XPS对催化剂进行表征.活性评价结果显示：Zr O2的存在,使得复合催化剂Cu O-Zn O-Zr O2/HZSM-5的催化性能明显提高;当Zr O2添加量占Cu O-Zn OZr O2质量的2%时,催化剂活性最高,CO2单程转化率为28.9%,DME的选择性、收率分别为55.1%和15.9%.表征结果表明：Zr O2对催化剂的比表面积、还原性能以及Cu O和Zn O的晶粒尺…
Synthesis and characterization of EFB clinker supported nickel and cobalt catalysts for methane dry reforming
Methane dry reforming is environmental friendly due to the potential sequestration of CO2. Therefore, substantial research works have been carried out to develop reforming catalysts that exhibit high catalytic performance and excellent longevity. The current work reports on the synthesis of 20wt%Co/80wt%EFB clinker an…
Electron microscopy characterization of magnesium based composites and aluminium alloys processed under the influence of external fields
Magnesium matrix composites, as light and strong materials, are very attractive for different industrial fields. In the present work, nano and micro-composites reinforced with ceramic particle (1 wt. %) were fabricated with ultrasonic-assisted process. Microstructural characterization was investigated by Transmission…
AISI 430不锈钢表面Co-Ni合金脉冲电沉积的过程
改善固体氧化物燃料电池金属连接体用AISI430不锈钢的抗氧化性能尤为重要。采用酸性镀液脉冲电镀的方法，在AISI430不锈钢表面制备出微纳米结构的Co—Ni合金镀层，研究了脉冲电镀工艺及镀层的生长机制。用XRD对微纳米结构镀层的物相进行分析，用SEM观察了不同电镀工艺条件下镀层的形貌。结果表明：在Co—Ni合金共沉积形成过程中，Co^2＋，Ni^2＋在阴极发生异常共沉积，形成了Co／Ni异质形核；随着晶体的长大，部分晶体优先快速长大，形成较大的晶粒，大小晶粒混合布满整个表面，主要通过阶梯方式生长形成了Co-Ni合金。