Materials Literature
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In the given article some articles of improvement of the spraying quality surface repaired using highly concentrated plasma energy sources are described. In particularly, the impact of plasmatron constructive peculiarities on the adhesion value, powder composition and its consumption as well as the reduction of coatin…
用熔融技术制备了Yb^3＋/Ho^3＋双掺氟氧化物微晶玻璃,通过实验确定了掺稀土离子微晶玻璃的配比、熔化温度和退火温度。采用Hitachi F-4500荧光分光光度计,激发波长为980nm激光器测定了样品的发射光谱。通过对光谱的分析,建立了上转换发光机制。测量了发光强度与抽运功率的关系,通过非线性拟合得出的斜率,确定了样品的540nm和650nm发射均为双光子过程。
The pigment characteristics of phytoplankton in the Novosibirsk reservoir are studied on the hydrologically different zones during the period of the most active planktonic algal coenoses development. The analysis of spatial distribution and dynamics of chlorophyll a and accessory plant pigment concentration was carrie…
针对无铅压电陶瓷的压电常数d33偏小的情况,采用传统的固相反应烧结方法制备得到了高压电性能的Bi0.5Na0.5TiO3基无铅压电陶瓷Bi0.5（Na0.7K0.3-xLix）0.5TiO3（x=0.04,0.08,0.12,0.16,0.20）.研究了Li元素的添加量对陶瓷的烧结温度以及压电性能的影响.研究结果表明,Li元素对K的替代可以降低陶瓷的烧结温度,提高样品致密度,适量的Li可以大幅度提高陶瓷的压电性能.陶瓷样品的压电常数d33和平面机电耦合系数kp随着Li含量的增加先增大后减小.在1 090℃的烧结温度下,Li含量x=0.08时的陶瓷样品表现出最佳的压电性能,压电常数d33=212 pC/N,平面机电耦合系数kp=33…
In ESD experimental diabetes mellitus on the background of vitamin E and mildronate introduction, an activation of amino acid system: SOD and catalaza and decrease of MDA content in erythrocytes. Normalization of POL on the background of vitamin E and mildronate leads to improvement of a pro-coagulant chain in homeost…
A porous coordination polymer, {[Ce(dpdo)4(H2O)3](PMo12O40)(dpdo)0.5(H2O)4}n 1 (dpdo = 4,4′-bipyridine-N,N′-dioxide), templated by double-Keggin-type polyanions was synthesized and structurally characterized. The crystal structure was determined by single-crystal X- ray diffraction. The crystal is of triclinic, space…
【Objective】 The study offered basic law of heat-conduction of reconsolidated cotton-stalks in order to make technological plan.【Method】 The temperature of mat's central-layer was measured in the hot-pressing process.The relations between the rising velocity of temperature of mat's central-layer and moisture content of…
Spring wheat pot experiments were used to study the slow release effect and mechanism of palygorskite coated fertilizer. The results show that palygorskite coated phosphorus helps to make a slow release of fertilizer, to increase the weight per 1 000 grains, the economic coefficients, the economic yield, and the bioma…
汶川大地震由于房屋倒塌和重建时危房拆除，将产生建筑垃圾2亿吨以上。如此大量的建筑垃圾，如果不能再利用，会占用大量土地，而且还将污染环境。地震灾区地处强地震带，新住宅建设既要抗震、造价经济，又要符合我国新的建设规划要求。将建筑垃圾循环再利用与经济型墙体材料的生产结合起来，以建筑垃圾生产建材制品用于建造适用于灾区的不同结构的示范房屋，既消纳了地震灾区无处堆放、无法处理的建筑垃圾，
用超声波法合成γ相二氧化锰（γ-MnO2）,然后通过循环伏安法在γ-MnO2颗粒表面电聚合聚苯胺（PANI）,合成PANI/MnO2复合电极.应用恒流充放电方法测试样品的电化学性能,结果表明γ-MnO2电极材料在电流密度500 mA/g时,比电容为210 F/g,而复合材料电极比电容为500 F/g,相比γ-MnO2电极材料提高了1.38倍.
In recent years, antibacterial surfaces have been a subject of increased interest. Especiallyinteresting are non-leaching, contact-active surfaces that physically disrupts the bacterialcell using immobilised cationic polymers. Thus the risks of bacterial resistance and discharge of hazardous biocides is minimised. The…
采用高温固相法合成P掺杂的BaMgAl10O17：Mn^2＋荧光粉,其中P通过（NH4）2HPO4引入.利用X射线衍射谱、傅里叶变换红外光谱、扫描电子显微镜、能量色散谱、真空紫外光谱等研究了P掺杂对BaMgAl10O17：Mn^2＋晶体结构、微观形貌、发光性能等的影响.研究结果表明：（NH4）2HPO4具有助熔剂的作用,它的加入有助于荧光粉的晶化,改善荧光粉的形貌.P掺杂进入晶格,使得晶胞参数变小,从而改变了Mn^2＋的晶体场环境,引起发射光谱蓝移,色坐标x值降低.P掺杂能有效提高基质对真空紫外线的吸收,从而提高真空紫外激发下的发光强度.
利用分离式Hopkinson压杆实验和显微分析技术，研究了U-5．7Nb合金在应变率范围（10^2／s-10^4／s）内的变形特征和微观组织。结果表明：U-5．7Nb合金的动态屈服强度明显高于其静态屈服强度，表现出明显的应变率敏感效应；当U-5.7Nb合金应变率为4300／s，试件在应变达到64％时发生剪切破坏。材料内部形成了明显的绝热剪切带，剪切带在与压缩方向垂直的平面内呈环形，这与动态压缩过程中应力分布不均匀有关。
采用絮凝-厌氧-好氧-梯级混凝法，对造纸废水处理进行试验研究，筛选出最佳的混凝及生化培养的条件。实验发现：采用液体PAC，前絮凝过程PAC的最佳投加量为2ml／L；经过14天驯化培养，生化阶段取得满意效果；梯级混凝过程PAC的最佳用量为1．8ml／L。实验结果表明，经该方法处理后废水CODcr，小于100mg／L，达到了造纸行业废水排放标准。本方法运行费用较低，是一种有较好前景的造纸废水处理工艺。
The luminescence of Nd3+-doped in NaBi(WO4)2 single crystal was investigated from 10 K to room temperature.The excitation source was a pulsed dye laser in resonance into the(4G5/2+2G(1)7/2) levels of Nd3+ ions.Several blue emission bands in the up-conversion luminescence spectra corresponded to transitions from 2P1/2…
采用高温固相法制备了Sr3Al2O6：Eu^2＋，Dy^3＋红色长余辉发光材料，研究了H3BO3掺杂量对其性能的影响。利用X射线衍射仪对材料的物相进行了分析，结果表明，1200℃下制备的不同H3BO3掺杂量样品的物相为Sr3Al2O6采用荧光分光光度计、照度计测定了样品的发光特性，结果表明Sr3Al2O6：Eu^2＋，Dy^3＋的激发峰位于472nm的宽带谱，发射峰为位于612nm的宽带谱，对应于EU^2＋的4f^6 5d^1→4f^7的跃迁；H3BO3的加入在促进产物晶化的同时，还可改变进入晶格中的Eu、Dy离子的浓度，从而改善余辉特性。余辉测试表明，Sr2.95Al1.8O6：0．02Eu^2＋，0．03Dy^3＋，0．2B^…
Since the development of the new technique SMAT (Surface Mechanical Attrition Treatment), great success has been achieved. The mechanical properties and the diffusion properties of materials treated by SMAT are greatly improved. Carbon nanomaterials such as carbon nanofibers (CNFs) and carbon nanotubes (CNTs) have att…
espanolEste trabajo busca confirmar la hipotesis de la existencia de anchos variables de pared de dominio, originadas en la posi-cion de la pared respecto a defectos o centros de anclaje[1]. Para ello se emplea un sistema de bicapas ferromagneticas (FM) crecidas a los largo del eje x, con diferentes propiedades magnet…
We develop a modern fluid simulation implementing the Smoothed Particle Hydrodynamics method with shared-memory parallelisation using OpenMP. The application features a rich set of time integration methods, particle kernels and explores two different parallel summation algorithms to evaluate the particle-particle forc…
利用熔融接枝法制备了马来酸酐接枝乙烯-辛烯共聚物（POE-g-MAH），将POE-g-MAH与线型低密度聚乙烯（LLDPE）共混后与铜片进行热复合。研究了热复合工艺、POE-g-MAH揍枝率及含量、苯乙烯-异戊二烯-苯乙烯共聚物（SIS）含量等因素对共混物黏结性能的影响。结果表明：随着POE-g-MAH接枝率和含量的增大，共混物的黏结性能增强，但POE-g-MAH含量过多将导致共混物黏结性能下降。其量佳用量为30phr；在LLDPE／POE-g-MAH共混物中加入20phr SIS可明显提高共混物的黏结性能；最佳热复合工艺条件：温度190℃，压力2MPa，时间1min。