Materials Literature
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The magnetic phase transition and magnetocaloric effect are studied in a series of Mn1-xZnxCoGe(x = 0.01, 0.02,0.04, and 0.08) alloys. By introducing a small quantity of Zn element, the structural transformation temperature of the MnCoGe alloy is greatly reduced and a first-order magnetostructural transition is observ…
Conductive fabrics have the potential to transform the textile industry with technological innovations that include self-warming clothing, adaptive camouflage, and biomimetics. Further understanding of the construction and properties of conductive fabric may one day realize the full potential of these applications. He…
We propose a polarization-insensitive and broadband subwavelength grating reflector based on a multilayer structure.The reflector has an overlapped high reflectivity(>99.5%) bandwidth of 248 nm between the TE and the TM polarizations,which is much higher than the previously reported results.We believe this subwaveleng…
In this article, an attempt is carried out morphologically biochemically to estimate the role of antigenic factor of growth of placenta (FGP) in development of placenta insufficiency. A cross-correlation analysis is conducted between the indexes of FGP in the whey of blood and supernatant liquid of fabric of chorion.…
以二氧化硅负载Dawson型磷钨酸H6 P2 W18 O62/SiO2为催化剂，采用环己酮和1，2-丙二醇为原料合成环己酮1，2-丙二醇缩酮．探讨H6 P2 W18 O62/SiO2对缩酮反应的催化活性，较系统地研究了各种因素对产物收率的影响．实验表明：H6 P2 W18 O62/SiO2是合成环己酮1，2-丙二醇缩酮的良好催化剂，在n（环己酮）∶n（1，2-丙二醇）＝1∶1．5，带水剂环己烷6 mL，催化剂用量占反应物料总质量的0．6％，反应时间60 min的优化条件下，环己酮1，2-丙二醇缩酮的收率可达85．4％．
BaTiO3 (BTO) waveguide thin films were prepared by pulsed laser deposition (PLD) on single crystal MgO substrate. In order to improve the crystalline quality and surface roughness, two process parameters of growth temperature and laser energy were studied and optimized, and the film sample was conducted in-situ anneal…
Herein, the conventional method for the synthesis of polyoxometalate clusters (POMs) and the study of the formation mechanism is challenged by the development of a new reactor system. This is because two of the current limitations in POM synthesis are the difficulty of prediction, and control over the assembly of the…
Nonpolar(11ˉ20) GaN films are grown on the etched a-plane GaN substrates via metalorganic vapor phase epitaxy.High-resolution X-ray diffraction analysis shows great decreases in the full width at half maximum of the samples grown on etched substrates compared with those of the sample without etching, both on-axis and…
In this work, three major topics are investigated. The decarbonylation of diphenylcyclopropenone from its second excited electronic state forms the first part. This reaction was investigated using pump laser pulses of several different wavelengths (267 nm and 295–340 nm). Earlier reports[1] that excited state diphenyl…
通过深冷处理前后Al-Zn-Mg-Cu合金在3．5％NaCl溶液中腐蚀速率的测试，结合电化学分析及金相和扫描电镜观察，研究了深冷处理对Al-Zn-Mg-Cu合金耐蚀性的影响。结果表明，深冷处理能显著减少Al-Zn-Mg-Cu合金中的第二相含量，从而有效提高Al-Zn-Mg-Cu合金的耐腐蚀性能。
Powierzchniowa redystrybucja sodu i innych modyfikatorow w szklach tlenkowych moze wplywac na zmiany wielu wlaściwości tych szkiel, np.: na odpornośc chemiczną, twardośc, powierzchniowe przewodnictwo elektryczne i wspolczynnik zalamania światla [1-4]. Zmiany rozkladu powierzchniowej koncentracji sodu mogą byc uzyskane…
Results of measurements of the internal friction, Poisson's constant and Young's modulus for various metals: copper, aluminium, copper without oxygen, brass, aluminium and silicon bronzes, in different states of deformation and heat treatment, were presented. Discovery of the formerly unknown anomaly of internal frict…
对3 mum厚的AZ31-O镁合金板和6061-T6铝合金板进行异种材料搅拌摩擦焊.实验中搅拌针的旋转速度为600～1400 r/min,前进速度为20～60 mm/min.结果表明,在旋转速度1000 r/min、前进速度40 mm/min的工艺条件下,可以获得无缺陷的焊接接头.组织观察发现搅拌区的晶粒尺寸要比基材区的明显小很多.在搅拌区形成了复杂的金属流动.显微硬度测试表明搅拌区的硬度分别是不均匀的.拉伸实验结果表明,接头的拉伸强度约为基材AZ31镁合金的76％,或6061铝合金的60％.接头拉伸断口SEM形貌观察表明为脆性断裂.
Perubahan iklim merupakan hal yang penting saat ini. Kenaikan suhu yang merupakan salah satu penyebab perubahan iklim/ global warming, juga disebabkan banyaknya penggunaan beton sebagai material dasar suatu bangunan baik itu jalan, jembatan, maupun gedung, karena beton yang bersifat panas. Dengan hal ini dibutuhkan su…
Reaction pathways for the formation of thiolate-gold nanoparticles are investigated by density functional theory(DFT) and a new mechanism upon solvent polarity and tetraalkylammonium is obtained. In solvents with high polarities, [Au(I)SR]n polymers can be formed as the precursor of metal ions prior to the addition of…
) 阶段没被溶解阻碍的谷物边界打手势它使谷物尺寸没在 homogenization 的过程改变。最佳 homogenization 条件是 545 °C/16 h。张力的力量增加了，收益力量减少了，粘性在 545 °C/16 h homogenization 处理以后显然改善了。
The aim of this work is the synthesis of new Schiff base derived from PVA and Erythro-ascorbic acid derivative (pentulosono-?-lactone-2,3-enedianisoate) and its metal complexes of biological significance. All synthesized compounds were characterized by Thin layer chromatography (TLC) and FTIR spectra and aldehyde was…
采用“烧结-球磨”方法制备Mg0．92 In0．05 Zn0．03三元固溶体合金，减小了Mg的晶格常数.利用粉末X-射线衍射分析合金的相组成、微观结构和吸放氢过程的相转变，通过扫描电镜观察合金的微观形貌及相分布.采用体积法测定合金的等温吸放氢曲线（ PCT）和动力学曲线，确定了合金的吸放氢反应焓变、熵变及氢化反应激活能.结果表明： Mg0．92 In0．05 Zn0．03三元固溶体具有良好的活化性能和动力学性能，脱氢反应焓降低至-68．6 kJ/mol H2.
Künstliche neurale Schnittstellen können verwendet werden, um das zentrale Nervensystem mit der äusseren Welt zu verbinden. Sie bieten deshalb grosses Potential für die Rehabilitierung von Patienten, die unter Lähmung, anderen Formen von motorischer Dysfunktion oder Amputationen leiden. Es wurden verschiedene Arten ne…
2-羟基4正辛氧基二苯甲酮（HOBP）与氯化铁在乙醇中经配位反应合成了一个新型的配合物——2-羟基-4-正辛氧基二苯甲酮合铁（Ⅲ）[Fe（OBP）3 （1）],其结构和光学性能经IR,LDI-TOF-MS,元素分析和UV-Vis表征.HOBP通过羰基氧和羟基氧原子与中心Fe以3∶1的比例形成配合物;1在329 nm有较强吸收,其loge为4.04.