新型无机-导电高分子纳米复合电磁屏蔽材料

该项目属于新型电磁屏蔽材料项目。导电高分子材料具有良好的导电性及电磁波的吸收衰减性能,在较宽广的频率范围内都具有好的反射一吸收屏蔽作用,而纳米至亚微米金属是磁屏蔽体,无机（金属）一导电高分子纳米复合导电涂层材料是高电导率及高磁导率材料的组合,并具有轻质、宽频、耐腐蚀、吸收大,可作为新型无机一有机电磁屏蔽材料使用。     

木质电磁屏蔽材料的研究现状及发展趋势

木质电磁屏蔽材料是以木质原料为基体,通过不同加工方式引入导电单元后制得的一种具有电磁屏蔽效能的复合材料,可用于屏蔽电磁辐射、防止电磁信号泄露和外界电磁干扰。全面阐述了木质屏蔽材料的种类、屏蔽效能的影响因素及作用机理,并在此基础上展望了未来木质屏蔽材料的发展趋势和方向。     

新型无机-导电高分子纳米复合电磁屏蔽材料

该项目属于新型电磁屏敝材料项目。导电高分子材料具有良好的导电性及电磁波的吸收衰减性能,在较宽广的频率范围内都具有好的反射-吸收屏蔽作用,而纳米至亚微米金属是磁屏蔽体,无机（金属）-导电高分子纳米复合导电涂层材料是高电导率及高磁导率材料的组合,许具有轻质、宽频、耐腐蚀、吸收大,可作为新型无机-有机电磁屏蔽材料使用。     

表面改性和复合工艺对金属纤维/聚合物复合材料性能的影响

以不锈钢纤维为导电填料,分别与ABS和PP复合,制得了电磁屏蔽用导电高分子复合材料。考察了表面改性和复合工艺对金属纤维／聚合物复合材料性能的影响。结果表明,用不同表面处理剂处理不锈钢纤维后,随纤维表面张力增加,复合材料的电阻率增加。使用母料法工艺可以有效地改善金属纤维在聚合物基体中的分散,从而提高复合材料的导电性能和电磁屏蔽性能。     

镀镍PET纤维/环氧树脂复合材料的性能

以PET纤维经超声波化学镀镍制成的导电PET/Ni纤维作填料,与环氧树脂共混,制得导电环氧树脂复合材料.对纤维表面镀层的形态结构及复合材料的导电性、电磁屏蔽性及力学性能进行了深入的研究.结果表明,填充适量(1%～5%,质量分数,下同)的纤维就可以得到导电性能良好的复合材料,同时也具有较好的电磁屏蔽性能,当纤维含量为3%时材料的力学性能也得到改善.     

电磁屏蔽涂料制备的新进展

从导电填料的种类、复合工艺及其对涂料导电性能的影响等方面,综述了近五年来掺和型电磁屏蔽涂料制备的最新进展.金属、石墨和复合导电填料等都具有良好的导电性,尤以复合导电填料应用效果最好;原位插层复(聚)合法是制备电磁屏蔽材料的一种较新复合工艺,可获得低逾渗阀值和高导电率,具有良好的发展前景;同时,导电填料的用量、性状、分散效果以及分散助剂等对电磁屏蔽涂料的导电性能都有较大影响.     

树脂基复合材料表面爆炸喷涂铝涂层性能研究

采用爆炸喷涂工艺在树脂基复合材料表面制备0.45mm厚的Al涂层,利用扫描电子显微镜、能谱仪、X射线衍射仪、力学试验机等对涂层显微组织、相组成和结合强度进行分析;依据GJB 2604-1996和GJB 6190-2008分别测试涂层表面导电性能和电磁屏蔽性能。结果表明:爆炸喷涂技术制备铝涂层结合强度达到8.63MPa,孔隙率约为1.26%,优于传统火焰喷涂和等离子喷涂;爆炸喷涂铝涂层表面电阻率达到0.181mΩ/,1~40GHz全频段电磁屏蔽效能达到60dB,是一种电磁屏蔽材料的理想选择。     

新型无机-导电高分子纳米复合电磁屏蔽材料

该项目属于新型电磁屏蔽材料项目。导电高分子材料具有良好的导电性及电磁波的吸收衰减性能,在较宽广的频率范围内都具有好的反射-吸收屏蔽作用,而纳米至亚微米金属是磁屏蔽体,无机（金属）-导电高分子纳米复合导电涂层材料是高电导率及高磁导率材料的组合,并具有轻质、宽频,耐腐蚀、吸收大,可作为新型无机一有机电磁屏蔽材料使用。     

新型导电复合材料

导电复合材料是以高聚物为基体,以石墨、炭黑、碳纤维或金属粉末等导电材料作为填充料的复合材料。它们既有导电性,同时又具有高分子材料的优点,如重量轻、耐腐蚀、可塑性和易加工成型等等。与金属材料不同,它们的导电率可以很方便地在很大的幅度范围内调节,从而可以做成防静电材料、电磁屏蔽材料、电阻加热材料以及电材料,因此,在工业、电子、医学、仪器民用电器等各个领域都有广泛的用途。     

屏蔽EMI用导电性高分子复合材料

介绍了屏蔽ＥＭＩ用导电性高分子复合材料的特点和制造方法（表面导电膜形成法和导电填料和分散复合法）。重点讨论了导电填料的种类、形态、填充量及不同复合工艺对复合材料屏蔽效果的影响。     

The Research of Anti-Wear Properties of Organomolybdenum Compounds in the Engine Oils

A four-ball tester was used to evaluate the anti-wear performance of three kinds of organomolybdemun compounds in the engine oils, i. e., molybdenum dialkyldithiophosphate (MoDDP), molybdenum dialkyldithiocarbamate ( MoDTC), and sulphur and phosphorus freeorganomolybdeum (Molybdate). The results indicate that a low concentration of MoDDP doesn' t improve the anti-wear properties of the commercial engine oils, but a high concentration of MoDDP can obviously improve the anti-wear properties and the load-carrying capacity of the engine oils. MoDTC doesn' t improve the antiwear properties of the engine oils, but worsens the anti-wear properties of the oils. Signifi can timprove ment of frictional and wear characteristics is obtained with Molybdate added in the commercial engine oils and the formulated oils.     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Certification Becomes Important for the I Quality; and Safety Supervision of the Chinese Liquor Sector

The end of 2007, over 200 unit products of more than 80 Chinese firms have passed the quality grade certification for liquor products. These products involve distilled spirits, beer, wine, yellow wine, fruit syrup wine and others, and cover over 80% of the national top-branded liquor products.……     

Deposition and Coating Properties on CVD Tungsten

Surface characterization and microstructure studies are performed on chemical vapor deposited (CVD) tungsten coating. There is about 2 μm thickness diffusion layer of tungsten in the molybdenum substrate. The thermal shock test shows tungsten coating has good adhesion with molybdenum substrate, but the elements of oxygen and carbon in the tungsten coating have the bad affection to the adhesion. The result of high-temperature diffusion experiment is the diffusion rate from molybdenum substrate to tungsten coating is faster.     

Analysis of marine hydrobiont lipid extracts as possible cryoprotective agents

We studied a combined effect of the cryoprotectants both of lipid and carbohydrate origin at the presence of DMSO or without it on cell viability and the RNA synthesis in the embryonic mollusc and echinoderm cell cultures obtained at different developmental stages. Cryoprotective properties of exogenous lipids correlated with their thermotropic behavior. Lipid extracts from marine hydrobiontes, which thermal transitions are characterized by relatively small part of calorimetric thermogram area lying at temperatures above 0 °C (6–18%), were found to possess a considerable cryoprotective activity. The results are discussed in relation to the prediction of the cryoprotective activity of lipid extracts for marine animal cells. In addition, it was found that marine invertebrate cells can be cryopreserved without DMSO at the presence of trehalose and lipid extracts of some marine hydrobiontes.     

Low-Temperature Properties of Silver

Pure silver is used extensively in the preparation of high-temperature superconductor wires, tapes, films, and other configurations in which the silver not only shields the superconducting material from the surrounding materials, but also provides a degree of flexibility and strain relief, as well as stabilization and low-resistance electrical contact. Silver is relatively expensive, but at this stage of superconductor development, its unique combination of properties seems to offer the only reasonable means of achieving usable lengths of conductor. In this role, the low-temperature physical (electrical, thermal, magnetic, optical) and mechanical properties of the silver all become important. Here we present a collection of properties data extracted from the cryogenic literature and, to the extent possible, selected for reliability.     

Early ironwork in Biscay: Survey,excavation, experimentation and materials characterization. An integral study of the mountainside ironworks (ferrerías de monte or “haizeolak”)

ABSTRACT

The production of iron in Biscay (Basque Country, Spain) has been a hallmark of this territory of the North of the Iberian Peninsula throughout its history. The Archaeology team of the Basque Country Mining Museum has spent 13 years, so far, studying the origins of this activity through the evidences left at the old pre-hydraulic iron production workshops known as mountainside ironworks (ferrerías de monte) or haizeolak. It has catalogued 170 archaeometallurgical sites of this type in Biscay, and the archeological excavation of some of them has led to the knowledge of the different stages of the production process that took place in these workshops. The team has also experimentally reproduced the work carried out in a mountainside ironworks from the High Middle Ages, and it has currently started the characterization process of this type of activity through the study of the collected materials.     

Optimum-Simulation von Ernteprozessen

Zusammenfassung Bei der Gestaltung von Ernteprozessen — beispielsweise des Prozesses Mähdrusch, Körnertransport und -abnahme — als transportverbundene Fließarbeitsverfahren mit mindestens zwei verschiedenen Arbeitsmitteln gibt es einen großen Optimierungsspielraum. Solche Prozesse sind mehrstufige Bedienungsprozesse mit gemischter Anordnung der Bedienungseinrichtungen. Außerdem besitzen sie stark ausgeprägte räumliche Aspekte. Es wird vor allem gezeigt, welche Merkmale solcher Prozesse in Simulationsmodellen abgebildet sein müssen, welche Zielgrößen in Abhängigkeit von welchen Einflußgrößen unter Berücksichtigung welcher Prozeßbedingungen ermittelt werden sollten und wie der Bewertungsprozeß zur Ermittlung der gewünschten Informationen gestaltet werden muß.     

Mechanism Study on the Wear of CrAlTiN Coated High-Speed Steel Twist Drills Under Dry Cutting Conditions

As demands about environment protection are growing up, dry cutting technology is getting more and more concerns from all over the world. Main works performed here are study on dry cutting performances and wear mechanisms of M2high-speed steel (HSS) twist drills with CrAlTiN multicomponent coatings, which was deposited using magnetron sputter ion plating system, in drilling 45 and 30CrMnSiA steel, and their comparisons to those in drilling the same steel but using monolayer CrN and commercial TiN coated drills. Drilling performances of drills are evaluated mainly through the measurements of width on outer corner flank land and the cutting forces. Results show that performances of CrAlTiN coated drills are better than those of monolayer CrN and TiN coated drills. In drilling 45 and 30CrMnSiA steel, the average tool life of the CrAlTiN coated drills are 17.2 and 11.8 times higher than those of the uncoated drills. Observing wear of the drill with scanning electronic microscope, results show that there is no crack or spallation of the CrAlTiN coatings in wear zones. Main mechanism of the wear here is adhesion.     

Structural Characteristics of TiO2 Ceramic Coating by Micro-Plasma Oxidation

TiO2 ceramic coatings with thickness of 20 μm were formed on the surface of pure titanium by micro-plasma oxidation. Their micro-structures were investigated by by using X-ray diffraction and their surface images were detected by using scan electronic microscope. There were three kinds of TiO2 coatings, pure anatase type TiO2 phase, mixed phases consisted of rutile type TiO2 phase and anatase type TiO2 phase, pure rutile type TiO2 phase. The coating surface with the pure anatase type TiO2 phase is rough, while the coating surface with the pure rutile type TiO2phase is smooth. The upper coating surface with the mixed type TiO2 phases is anatase type TiO2 structure and the subsurface of the TiO2 coating is rutile type TiO2structure.