{"currentpage":1,"firstResult":0,"maxresult":10,"pagecode":5,"pageindex":{"endPagecode":5,"startPagecode":1},"records":[{"abstractinfo":"The <span style=\"color:red\">permittivity</span> and permeability of the Tb-doped and undoped Fe core-shell nanoparticles were investigated for frequencies from 2 to 18 GHz. The particles were synthesized by arc discharge and contain some oxygen, probably in the form of Fe(2)O(3), Fe(3)O(4), and Tb(2)O(3), whereas the core material is Fe. Both the electromagnetic materials constants and the morphology of the Fe nanoparticles are changed by Tb addition, which gives rise to the shifts to higher frequencies and thinner thicknesses of the maximum microwave absorption in the Tb-doped Fe nanoparticles. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3369972]","authors":[],"categoryName":"|","doi":"","fpage":"","id":"18d580d0-c5b0-4a02-a5fc-7842e6f024e9","issue":"9","journal":{"abbrevTitle":"JOAP","id":"7dcf8a89-0513-40ee-be2d-759941dcef7e","issnPpub":"0021-8979","publisherId":"JOAP","title":"Journal of Applied Physics"},"keywords":[{"id":"e44bb2e0-45db-4c56-a900-5219b8be1aab","keyword":"<span style=\"color:red\">complex</span> <span style=\"color:red\">permittivity</span>;<span style=\"color:red\">carbon</span> <span style=\"color:red\">nanotubes</span>;<span style=\"color:red\">composites</span>;<span style=\"color:red\">films</span>;<span style=\"color:red\">band</span>","originalKeyword":"complex permittivity;carbon nanotubes;composites;films;band"}],"language":"en","publisherId":"0021-8979_2010_9_5","title":"<span style=\"color:red\">Permittivity</span> and permeability of Fe(Tb) nanoparticles and their microwave absorption in the 2-18 GHz range","volume":"107","year":"2010"},{"abstractinfo":"The electromagnetic (EM) wave absorbing property of silicone rubber filled with carbonyl iron particles (CIPs) and multi-walled <span style=\"color:red\">carbon</span> <span style=\"color:red\">nanotubes</span> (MWCNTs) was examined. Absorbents including MWCNTs and spherical/ flaky CIPs were added to silicone rubber using a two-roll mixer. The <span style=\"color:red\">complex</span> <span style=\"color:red\">permittivity</span> and <span style=\"color:red\">complex</span> permeability were measured over the frequency range of 1{18 GHz. The two EM parameters were verified and the uniform dispersion of MWCNTs and CIPs was confirmed by comparing the measured reflection loss (RL) with the calculated one. As the MWCNT weight percent increased, the RL of the spherical CIPs/silicone rubber <span style=\"color:red\">composites</span> changed insignificantly. It was attributed to the random distribution of spherical CIPs and less content of MWCNTs. On the contrary, for <span style=\"color:red\">composites</span> filled with flaky CIPs the absorption bandwidth increased at thickness 0.5 mm (RL value lower than -5 dB in 8-18 GHz) and the absorption ratio increased at lower frequency (minimum {35 dB at 3.5 GHz). This effect was attributed to the oriented distribution of flaky CIPs caused by interactions between the two absorbents. Therefore, mixing MWCNTs and flaky CIPs could achieve wider-<span style=\"color:red\">band</span> and higher-absorption ratio absorbing materials.","authors":[{"authorName":"Yonggang Xu","id":"9affd981-cf8c-4f77-86f8-2045a4fa2009","originalAuthorName":"Yonggang Xu"}],"categoryName":"|","doi":"","fpage":"34","id":"b227900d-d749-42a8-9a81-1f7e91d4e7df","issue":"1","journal":{"abbrevTitle":"CLKXJSY","coverImgSrc":"journal/img/cover/JMST.jpg","id":"11","issnPpub":"1005-0302 ","publisherId":"CLKXJSY","title":"材料科学技术（英文）"},"keywords":[{"id":"ed990a00-309a-46d1-81ea-ec20958f0d40","keyword":"Absorbing materials","originalKeyword":"Absorbing materials"}],"language":"en","publisherId":"1005-0302_2012_1_8","title":"Effects of Multi-walled <span style=\"color:red\">Carbon</span> <span style=\"color:red\">Nanotubes</span> on the Electromagnetic Absorbing Characteristics of <span style=\"color:red\">Composites</span> Filled with Carbonyl Iron Particles","volume":"28","year":"2012"},{"abstractinfo":"Nano-copper <span style=\"color:red\">films</span> were prepared by DC magnetron sputtering. Their reflectivity and transmittivity to electromagnetic wave in infrared region were measured with Fourier Transformation Infrared Spectrometer (FTIR), by which their <span style=\"color:red\">complex</span> optical constant and <span style=\"color:red\">permittivity</span> were obtained. The results show that the <span style=\"color:red\">complex</span> optical constant and pen-nittivity of nano-copper <span style=\"color:red\">films</span> depend upon the film thickness. This dependence is correlated with microstructure transition during the film growth. (C) 2003 Elsevier B.V. All rights reserved.","authors":[],"categoryName":"|","doi":"","fpage":"1117","id":"afe917fc-79a9-49ad-8d8e-772f75633bb2","issue":"6","journal":{"abbrevTitle":"ML","id":"90b15a58-51fc-41ad-8509-c2692f6a3f6e","issnPpub":"0167-577X","publisherId":"ML","title":"Materials Letters"},"keywords":[{"id":"e26fa360-8d19-4340-bcae-616194ea8c2d","keyword":"magnetron sputtering;nano-copper film;<span style=\"color:red\">complex</span> optical constant;<span style=\"color:red\">complex</span> <span style=\"color:red\">permittivity</span>;size effect;thin-<span style=\"color:red\">films</span>;reflectance;thickness","originalKeyword":"magnetron sputtering;nano-copper film;complex optical constant;complex permittivity;size effect;thin-films;reflectance;thickness"}],"language":"en","publisherId":"0167-577X_2004_6_1","title":"Size effect of nano-copper <span style=\"color:red\">films</span> on <span style=\"color:red\">complex</span> optical constant and <span style=\"color:red\">permittivity</span> in frared region","volume":"58","year":"2004"},{"abstractinfo":"Preforms containing <span style=\"color:red\">carbon</span> <span style=\"color:red\">nanotubes</span> (CNTs) were fabricated by in situ grown in unidirectional <span style=\"color:red\">carbon</span> cloths, and densified by chemical vapor infiltration (CVI) to prepare CNT reinforced C/C <span style=\"color:red\">composites</span> (CNT-C/C <span style=\"color:red\">composites</span>). The density change of obtained <span style=\"color:red\">composites</span> during CV! was investigated. The results show that densification rate of CNT-C/C <span style=\"color:red\">composites</span> is higher than that of pure C/C composite. Densification rate has the maximum value when the CNT content is 5 wt%. Polarized-light optical microscopy, SEM and TEM were used to analyze the effect of CNTs on the structure of obtained <span style=\"color:red\">composites</span>. The results show that the existence of CNTs can not only contribute to the formation of high-textured pyrolytic <span style=\"color:red\">carbon</span>, but also increase the number of interfaces and form the complicated interface in C/C <span style=\"color:red\">composites</span>. This structure change leads to higher flexural properties of CNT-C/C <span style=\"color:red\">composites</span> than that of pure C/C composite. (C) 2010 Elsevier B.V. All rights reserved.","authors":[],"categoryName":"|","doi":"","fpage":"3056","id":"2f776e7a-8321-4f59-ab23-160b455e52ea","issue":"42924","journal":{"abbrevTitle":"MSAEAMPMAP","id":"29fa6a83-07f2-4d3a-af3e-fac686227352","issnPpub":"0921-5093","publisherId":"MSAEAMPMAP","title":"Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing"},"keywords":[{"id":"bf900c53-832f-4ec4-a82e-23847657d65b","keyword":"<span style=\"color:red\">Carbon</span> <span style=\"color:red\">nanotubes</span>;<span style=\"color:red\">Carbon</span>/<span style=\"color:red\">carbon</span> <span style=\"color:red\">composites</span>;Grown in situ;Interface;Structure;chemical-vapor infiltration;pyrolytic <span style=\"color:red\">carbon</span>;deposition;pyrocarbon;morphology","originalKeyword":"Carbon nanotubes;Carbon/carbon composites;Grown in situ;Interface;Structure;chemical-vapor infiltration;pyrolytic carbon;deposition;pyrocarbon;morphology"}],"language":"en","publisherId":"0921-5093_2011_42924_2","title":"Effect of in situ grown <span style=\"color:red\">carbon</span> <span style=\"color:red\">nanotubes</span> on the structure and mechanical properties of unidirectional <span style=\"color:red\">carbon</span>/<span style=\"color:red\">carbon</span> <span style=\"color:red\">composites</span>","volume":"528","year":"2011"},{"abstractinfo":"Silver matrix composite brushes were fabricated by means of powder metallurgy, which included pressing at 300 MPa and then sintering for 1 h in pure H<sub>2</sub> protective atmosphere at 700 ℃ and repressing at 500 MPa. Four kinds <span style=\"color:red\">composites</span> with different compositions were produced, and the mechanical properties and electrical wear performance were investigated. The results showed that the composite added with <span style=\"color:red\">carbon</span> <span style=\"color:red\">nanotubes</span> had a higher hardness and strength, a lower contact voltage drop and an excellent anti-wear property in electrical sliding wear, because of the reinforcement ability of <span style=\"color:red\">carbon</span> <span style=\"color:red\">nanotubes</span>. Adding graphite to the composite also decreased the wear loss and contact voltage drop, because graphite had an electrical current conducting ability which not only made the current pass the lubricating <span style=\"color:red\">films</span> easily but also eliminated and reduced the arc and spark effectively.","authors":[{"authorName":"Shu LI","id":"1dc11a15-142d-4842-a5d3-7691d1979b61","originalAuthorName":"Shu LI"}],"categoryName":"|","doi":"","fpage":"27","id":"4048299e-5723-4095-bdd4-284b267cf87c","issue":"1","journal":{"abbrevTitle":"JSXBYWB","coverImgSrc":"journal/img/cover/amse.jpg","id":"49","issnPpub":"1006-7191","publisherId":"JSXBYWB","title":"金属学报(英文版)"},"keywords":[{"id":"51a3e1d2-6b4a-42b0-8158-9bfa3a8396c9","keyword":"Ag-MoS<sub>2</sub> composite","originalKeyword":"Ag-MoS<sub>2</sub> composite"},{"id":"48ad9ea8-3a50-4319-b4b7-6f085eab4911","keyword":" <span style=\"color:red\">Carbon</span> nanotube","originalKeyword":" Carbon nanotube"},{"id":"defb8ff4-1111-43dc-86c5-70a0229bf347","keyword":" Graphite","originalKeyword":" Graphite"},{"id":"c659fdff-8d01-40fd-9154-3066d7436191","keyword":" Electrical contact","originalKeyword":" Electrical contact"},{"id":"f2cf1280-e3a5-49cf-ae12-16e8ff53be16","keyword":" Wear voltage loss","originalKeyword":" Wear voltage loss"}],"language":"en","publisherId":"1006-7191_2010_1_6","title":"Influence of adding <span style=\"color:red\">carbon</span> <span style=\"color:red\">nanotubes</span> and graphite to Ag-MoS<sub>2</sub> <span style=\"color:red\">composites</span> on the electrical sliding wear properties","volume":"23","year":"2010"},{"abstractinfo":"Multi-walled <span style=\"color:red\">carbon</span> <span style=\"color:red\">nanotubes</span> (MWCNTs) enhanced high-density polyethylene (HDPE) <span style=\"color:red\">composites</span> were prepared and their thermophysical properties were measured. The thermal diffusivity of the <span style=\"color:red\">composites</span> increases with the increase in the amount of MWCNTs. A thermal diffusivity of more than three times that of pure HDPE was obtained for 38 vol. % MWCNTs/HDPE <span style=\"color:red\">composites</span>. An equation based on an effective medium approach model was used to discuss the thermal diffusivity enhancement of MWCNTs/HDPE <span style=\"color:red\">composites</span> as a function of the volume fraction of MWCNTs. The results from this analysis can be a predictive guideline for further improvements in the thermal transport properties of MWCNTs/HDPE <span style=\"color:red\">composites</span>. Moreover, the intrinsic longitudinal thermal conductivity k(z) of an individual MWCNT was deduced from the measured results on the MWCNTs/HDPE <span style=\"color:red\">composites</span>.","authors":[],"categoryName":"|","doi":"","fpage":"25","id":"d83d8e04-9356-4cef-a25f-af75ae670c1f","issue":"1","journal":{"abbrevTitle":"APAS&P","id":"cde04357-7cb8-4746-b682-a64bfb9590d6","issnPpub":"0947-8396","publisherId":"APAS&P","title":"Applied Physics a-Materials Science & Processing"},"keywords":[{"id":"3f2328a1-84a6-42aa-8454-49dd0192ef00","keyword":"flash method;conductivity;diffusivity;heat","originalKeyword":"flash method;conductivity;diffusivity;heat"}],"language":"en","publisherId":"0947-8396_2006_1_1","title":"Thermal transport enhancement of multi-walled <span style=\"color:red\">carbon</span> <span style=\"color:red\">nanotubes</span>/high-density polyethylene <span style=\"color:red\">composites</span>","volume":"85","year":"2006"},{"abstractinfo":"<span style=\"color:red\">Carbon</span> <span style=\"color:red\">nanotubes</span> reinforced pure Al (CNT/Al) <span style=\"color:red\">composites</span> were produced by ball-milling and powder metallurgy. Microstructure and its evolution of the mixture powders and the fabricated <span style=\"color:red\">composites</span> were examined and the mechanical properties of the <span style=\"color:red\">composites</span> were tested. It was indicated that the CNTs were gradually dispersed into the Al matrix as ball-milling time increased and achieved a uniform dispersion after 6 h ball-milling. Further increasing the ball-milling time to 8-12 h resulted in serious damage to the CNTs. The tensile tests showed that as the ball-milling time increased, the tensile and yield strengths of the <span style=\"color:red\">composites</span> increased, while the elongation increased first and then decreased. The strengthening of CNTs increased significantly as the ball-milling time increased to 6 h, and then decreased when further increasing the ball-milling time. The yield strength of the composite with 6 h ball-milling increased by 42.3% compared with the matrix. (c) 2012 Elsevier Ltd. All rights reserved.","authors":[],"categoryName":"|","doi":"","fpage":"2161","id":"c48d8322-79ef-4b4d-b6ff-fb5393af75c9","issue":"12","journal":{"abbrevTitle":"CPASAM","id":"abd476e3-6bc6-49bf-9f31-af87fc126bf5","issnPpub":"1359-835X","publisherId":"CPASAM","title":"Composites Part a-Applied Science and Manufacturing"},"keywords":[{"id":"496c6f68-0b0f-4667-908a-91f66994870b","keyword":"Metal-matrix <span style=\"color:red\">composites</span> (MMCs);Mechanical properties;Powder processing;interfacial reaction;nanocomposites;functionalization;dispersion","originalKeyword":"Metal-matrix composites (MMCs);Mechanical properties;Powder processing;interfacial reaction;nanocomposites;functionalization;dispersion"}],"language":"en","publisherId":"1359-835X_2012_12_1","title":"Effect of ball-milling time on mechanical properties of <span style=\"color:red\">carbon</span> <span style=\"color:red\">nanotubes</span> reinforced aluminum matrix <span style=\"color:red\">composites</span>","volume":"43","year":"2012"},{"abstractinfo":"The <span style=\"color:red\">complex</span> relative <span style=\"color:red\">permittivity</span> epsilon(gamma) and permeability mu(gamma) of microcoiled <span style=\"color:red\">carbon</span> fibers (MCCFs) imbedded in paraffin wax were measured at Ku <span style=\"color:red\">band</span> frequencies (12.4-18 GHz). Both the real and imaginary parts of the <span style=\"color:red\">complex</span> relative <span style=\"color:red\">permittivity</span> of the MCCFs/paraffin wax composite decreased with increase of the frequency. The real part of the <span style=\"color:red\">complex</span> relative permeability of the composite increases with increase of the frequency, and the imaginary part is nonzero and nearly constant over the measured frequency range. The dielectric loss tangent (tan delta(m)), the magnetic loss tangent (tan delta(m)), and amplitude attenuation factor W were determined as well. On the basis of the experimental results, the MCCFs/paraffin wax composite is mainly a kind of dielectric lossy material with small magnetic loss and diamagnetism in the Ku <span style=\"color:red\">band</span>.","authors":[],"categoryName":"|","doi":"","fpage":"1232","id":"53af6167-64bc-4988-8d9b-4d35ddff8828","issue":"5","journal":{"abbrevTitle":"JOMR","id":"155c387a-c8cb-4083-85f3-6b58aeef4116","issnPpub":"0884-2914","publisherId":"JOMR","title":"Journal of Materials Research"},"keywords":[{"id":"a380c9c8-255b-41b5-959a-c60196ef9343","keyword":"chemical-vapor-deposition;growth-mechanism;fibers;pyrolysis;acetylene;coils;temperature","originalKeyword":"chemical-vapor-deposition;growth-mechanism;fibers;pyrolysis;acetylene;coils;temperature"}],"language":"en","publisherId":"0884-2914_2002_5_1","title":"Microwave electromagnetic characteristics of a microcoiled <span style=\"color:red\">carbon</span> fibers/paraffin wax composite in Ku <span style=\"color:red\">band</span>","volume":"17","year":"2002"},{"abstractinfo":"A good dispersion of single-walled <span style=\"color:red\">carbon</span> <span style=\"color:red\">nanotubes</span> (SWCNTs) in liquid media is a prerequisite to fulfill many of their applications. This contribution reports an efficient approach to additive-free dispersion of SWCNTs with the aid of functionalized carbonaceous byproducts (CBs, e. g., amorphous <span style=\"color:red\">carbon</span>, <span style=\"color:red\">carbon</span> nanoparticles, and carbonaceous fragments) in SWCNT products. SWCNT bundles are treated by oleum intercalation and nitric acid oxidation in sequence, which leads to the selective functionalization of the CBs while the structure and properties of the SWCNTs are well preserved. These functionalized CBs can improve the subsequent dispersion of SWCNTs and the majority of SWCNTs in the suspension are present in small bundles or individually. Moreover, SWCNT transparent conductive <span style=\"color:red\">films</span> (TCFs) are fabricated by using these suspensions. The SWCNT TCFs obtained can achieve a low sheet resistance of 76 and 133 Omega sq(-1), with optical transmittance of 82% and 90% at 550 nm, respectively.","authors":[],"categoryName":"|","doi":"","fpage":"2330","id":"00c56182-96f9-4ed9-884e-909a7239e7c5","issue":"12","journal":{"abbrevTitle":"AFM","id":"5432117b-90b1-4e35-9780-1d10a45ba89f","issnPpub":"1616-301X","publisherId":"AFM","title":"Advanced Functional Materials"},"keywords":[{"id":"bd642444-60f0-42ec-88ab-94267a817eb2","keyword":"kataura plot;spectroscopy;purification;networks;water;functionalization;hydrocarbons;dissolution;electrodes;separation","originalKeyword":"kataura plot;spectroscopy;purification;networks;water;functionalization;hydrocarbons;dissolution;electrodes;separation"}],"language":"en","publisherId":"1616-301X_2011_12_1","title":"Additive-Free Dispersion of Single-Walled <span style=\"color:red\">Carbon</span> <span style=\"color:red\">Nanotubes</span> and Its Application for Transparent Conductive <span style=\"color:red\">Films</span>","volume":"21","year":"2011"},{"abstractinfo":"Nickel-coated multiwalled <span style=\"color:red\">carbon</span> <span style=\"color:red\">nanotubes</span> (NiMWNT) were prepared by electroless deposition with ultrasonic vibrations. The morphologies and components were characterized by scanning electron microscope and energy dispersive spectroscopy. Two types of fillers, multiwalled <span style=\"color:red\">carbon</span> <span style=\"color:red\">nanotubes</span> (MWNT) and Ni-MWNT, were blended with poly(phthalazinone ether sulfone ketone)s (PPESK) by the solution-mixing method, respectively. The electrical conductivity and microwave absorbing properties of the <span style=\"color:red\">composites</span> were investigated. The results show that Ni-MWNT/PPESK <span style=\"color:red\">composites</span> have relatively lower electrical resistivity values than MWNT/PPESK, and in both cases the decrease in electrical resistivity indicates a similar percolation transition behavior in the same MWNT content region. Moreover, as MWNT loading is 5 parts per hundred parts of resin (phr), Ni-MWNT/PPESK composite has the wider frequency region (9.5-13.5 GHz) of the reflection loss (RL) less than -10 dB and the lower minimum value of RL (-27.5 dB) compared with MWNT/PPESK. The better microwave absorption properties can be attributed to the improved dielectric and magnetic properties of the fillers. A good correlation between electrical conductivity and microwave absorption was found for MWNT/PPESK <span style=\"color:red\">composites</span>. In addition, tensile test and thermogravimetric analysis indicate that introducing Ni-MWNT into PPESK is favorable for the improvement of the mechanical properties and high temperature stability of the <span style=\"color:red\">composites</span>.","authors":[],"categoryName":"|","doi":"","fpage":"1007","id":"48472f2b-5f77-44a8-8c17-9ec22cfb2076","issue":"5","journal":{"abbrevTitle":"PEAS","id":"55d62f2d-24df-4a21-9aac-8166fb8a2ac8","issnPpub":"0032-3888","publisherId":"PEAS","title":"Polymer Engineering and Science"},"keywords":[{"id":"155e23de-1565-4574-af4f-be48e2d5fc18","keyword":"x-<span style=\"color:red\">band</span> frequency;nanotube <span style=\"color:red\">composites</span>;absorption;black;<span style=\"color:red\">permittivity</span>;ferrite;rubber;permeability;particles;design","originalKeyword":"x-band frequency;nanotube composites;absorption;black;permittivity;ferrite;rubber;permeability;particles;design"}],"language":"en","publisherId":"0032-3888_2008_5_1","title":"Electrical conductivity and microwave absorbing properties of nickel-coated multiwalled <span style=\"color:red\">carbon</span> <span style=\"color:red\">nanotubes</span>/poly(phthalazinone ether sulfone ketone)s <span style=\"color:red\">composites</span>","volume":"48","year":"2008"}],"totalpage":535,"totalrecord":5346}