The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Cu-WC-Si composites were synthesized by using a planetary ball milling. Different composition of elemental Cu, WC and Ti powders were mixed and milled for 5 and 10 hours in an open air. The powder characterized before and after milling to expose the effect of milling variables on particle size, homogenization and contamination. Analyzing carried out by using X-ray and scanning electron microscope...
RF magnetron sputtering gas pressure and substrate temperature on Al-doped ZnO (ZAO) thin film optical performance has important implications. Al-doped ZnO (ZAO) thin films were prepared by RF magnetron sputtering technology. We realized ZAO films with the better performance by adjusting and optimizing the sputtering gas pressure and substrate temperature. Using UV-vis spectrophotometer tested the...
Poly(ester-imide)s (PEI)s are a kind of non-vinyl polymers which can be prepared via step-growth polymerization. They contain ester and imide linkages in the polymer backbones and lately show significant applications, such as adhesives, printed circuit boards, membranes, and engineering thermoplastics. Synthesis of chiral polymers is an important field in macromolecular science, they have attracted...
The study on Low temperature co-fired ceramic (LTCC) has been widely investigated due to its potential as an advanced approach for packaging of electronics devices. This paper evaluates and discusses about the firing temperatures effect on the densification, thermal and electrical properties of the prepared LTCC material. The LTCC tape, which consists mostly of Al2O3 was fabricated using tape casting...
This paper presents field electron emission current density of the hydrogen plasma treated nano-ZnO thin films. The surface morphology, microstructure and surface resistance of nano-ZnO thin films deposited on Mo layer are characterized by X-ray diffraction pattern (XRD), field emission scanning electron microscopy (FE-SEM), energy dispersive spectrum (EDS) and surface resistance meter.
Cr/CrN nano-multilayers have been produced by varying the period and the degree of unbalancing in a magnetron sputtering system in order to study the influence of these parameters in the electrical properties. X-ray Diffraction (XRD) was used to investigate the microstructure characteristics of the multilayers and the Four Point Probe (FPP) technique in the Van der Pawn mode was used to evaluate electrical...
Oxide materials which exhibit both ferroelectricity and ferromagnetism are of great interest. Layered bismuth titanates with a Aurivillius structure, (BiFeO3)n Bi4Ti3O12, can potentially posses ferroelectric and ferromagnetic order paramaters simultaneously. It has recently been demonstrated that one such example, Bi5Fe0.5Co0.5Ti3O15 where n = 1 with half the Fe3+ sites substituted by Co3+ ions exhibits...
In order to improve service life of hot forging die, Ni60-SiC cermet coating was prepared on the high speed steel W6Mo5Cr4V2 under different processing parameters using plasma cladding technology. The clad coating composition, microstructure and microhardness were analyzed by X-ray diffractometer (XRD), optical microscopy (OPM) and microhardness tester. The experimental results show that Ni+25 wt...
In this work are discussed the technology for preparing and characterisation of indium-tin oxide (ITO) and ITO with titanium oxide underlayer thin films with properties appropriate for usage at elevated temperatures as heat reflective coatings and gas sensors. For preparing the samples the methods of radio frequency (RF) and DC-magnetron reactive sputtering were used. Sputtering of indium-tin and...
We synthesized undoped and Mn-doped ZnO films on glass substrates using the sol-gel technique. The micro-structure, morphology and optical properties of ZnO films were studied by using X-ray diffraction, Atomic Force Microscope and UV-visible transmission spectra. After annealed at a temperature lower than 550°C by Rapid Thermal Processing (RTP), all the ZnO films are polycrystalline with a hexagonal...
We have investigated the properties of Mn-doped ZnO nanocrystalline films grown on zinc foil by hydrothermal method. The microstructure, optical and magnetic properties of these films have been characterized by SEM, XRD, XPS and UV-vis spectrum. The XPS spectra show the doping manganese exists as Mn2+. From UV-vis spectra, the shift in band gap and greater reflectivity can be observed due to Mn doping...
Semiconducting ??-FeSi2 material has many potential applications in advanced electronic and optoelectronic devices. In this work, we report for the first time the synthesis of crystalline ??-FeSi2 via high-temperature and high-pressure reaction of Si and Fe powders. The XRD and Raman scattering results confirm the formation of ??-FeSi2. The HRTEM images show the existence of two kinds of lattice fringes...
In the present study, the interaction between thin film Cu and non-eutectic Sn-In is studied. The effects of the bonding and aging temperature on microstructure, IMC formation and also shear strength are investigated by SEM/EDX, XRD and shear testing. The bonding mechanism is proposed based on the obtained results. The bonding mechanism is proposed to occur over 2 stages: (1) An increase in bonding...
The Bi2Sr2CaCu2O8 (Bi-2212) superconductor powder with 5% nanosize MgO addition was used to fabricate Bi-2212 tapes through the dip-coating-then-stacking method. In this method, the tapes were prepared by stacking layers of single side dip-coated silver strips, and then wrapping them with silver foil. The tape samples were rolled and pressed to increase the packing density of the superconductor core,...
The bioactivity of glass ceramics with different amount of fluorapatite expressed as P2O5 content has been tested in vitro in static and dynamic regime. The paper reports the complete results of bioactivity test of glass-ceramics in static regime. XRD, SEM, and microprobe analysis were used to characterise the sample as well as to detect the presence of new phase onto the surface. The bioactivity,...
Lead-free piezoelectric ceramics 0.96(K0.5Na0.5)(Nb0.96Sb0.04)-0.04LiTaO3 (96KNNS-4LT) have been prepared by using the conventional technique. The effect of the sintering temperature on the piezoelectric properties of 96KNNS-4LT ceramics was studied. The X-ray diffraction (XRD) and scanning electron microscope (SEM) show that all the ceramics possess a pure perovskite phase and dense microstructure...
In recent years, combining a ferroelectric ceramic and a polymer matrix to form a flexible composite with coupling properties in between that of two individual phases has been pursued for sensors in medical applications and hydrophones. For hydrophone applications, a useful piezoelectric material should have high piezoelectric voltage coefficient (g33), piezoelectric strain coefficient (d33) and high...
The present paper addresses the formation and evolution of microstructure and crystal structure of electroplated copper columns. Copper columns of different size have been plated on Au seed layer for a series of periods of time from half an hour to three hours and characterized by Focused Ion Beam (FIB) and XRD. It was found that not only the growth process during plating but also accompanying recrystallization...
With the development of microelectronics and semiconductor, the density of electronic packaging increases quickly, which result in the high demand to the material. Aluminum reinforced with silicon carbide particles composites is one of potential materials for electronic packaging with its excellent properties such as low density, high thermal conductivity, lower coefficient of thermal expansion etc...
This study aims to develop a methodology for analysis of physicochemical characteristics of municipal solid waste incineration (MSWI) fly ash. In this work, microstructure, particulate size distribution and components of fly ash were investigated using SEM, laser particulate description analyzer, ICP, XRF, IR and XRD. It is found that content of chemical components follows sequence of CaO > SiO...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.