Materials Literature
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Acoustic radiation from circular piezoelectric plates with complex shapes in a flat rigid shield is analyzed on the basis of a combined numerical-analytical method. It is shown that such piezoelectric plates of the first-type ceramics ((ЦТБC-3) provide a higher sensitivity in the transmission mode in comparison to a s…
A novel internal electric field enhanced retention model for localized charge trapping memory devices is proposed to explain the reliability degradation. According to the model, the excitation energy level distribution profiles of trapped holes after different P/E cycling stress are demonstrated for the first time.
Radiation-curable acrylated epoxy oligomer was irradiated by using an electron beam (E-beam) with dosages of 5, 10, 20, 40, 80, 200, 400, and 550 kGy to investigate the electrical and the physical properties of anisotropic conductive films (ACFs) and to evaluate the potential application of radiation technology to fli…
Mullite-stabilized zirconia fibres were synthesized by the laser floating zone (LFZ) method. Fibres grown at 100 mm/h have fine-interpenetrating mullite-zirconia eutectic grains surrounded by an amorphous phase rich in Al, Y and Si. The crystalline phases identified by XRD are mullite with an orthorhombic crystal stru…
This paper presents an SPH (smoothed particle hydrodynamics) model for numerical simulation of multiphase drop dynamics including liquid drop formation and deformation, coalescence and separation, liquid drop impacting, spreading and splashing. SPH is a Lagrangian, meshfree particle method. It has special advantages i…
The NiO/Co composite material was prepared by doping Co in the NiO, and the Co was prepared by chemical reduction. The structure morphology and performance were characterized by XRD, SEM, charge-discharge tests, cyclic voltammetry (CV), AC impedance and the behavior of lithium insertion-extraction was also be discusse…
The Finnis-Sinclair many-body potential model was utilized to construct the interatomic potential function in B2 type FeAl alloy at equilibrium state. According to the model, the binding energy, the elastic constants C11, C12 and C44 were calculated, and the results agree well with the experimental results. The format…
The block polymer methoxy(polyethylene glycol)-poly(dl-lactide-co-glycolic acid) (MePEG-PLGA) nanoparticles were fabricated by modified spontaneous emulsification/solvent evaporation method, and further characterized their shape, size, zeta potential, glass transition temperature and other items by scanning electron m…
In this work, TiO2nanoparticles (NPs) were prepared through a well-developed hydrothermal method. The dry products were characterized by digital camera, transmission electron microscopy (TEM), X-ray diffraction (XRD) and thermogravimetric method (TGA). These results suggested that TiO2NPs were well-crystallized and ol…
Abstract: In order to assess the safety of the explosive anti-riots munition, proceeding with the pellet fragment’s force condition was analysed in the flying process, the trajectory model of the pellet fragment for the explosive anti-riots munition was deduced, the trajectory curve of the pellet fragment were calcula…
Abstract: Manganese zinc ferrite/barium ferrite composite materials were prepared with various content of Z type barium ferrite (0, 10, 20 wt%) using solid state reaction method. The effect of the compositon on the microstructure and electromagnetic properties of the composites are investigated by means of X-ray diffr…
The influence of some monoatomic alcohols (ethanol, isopropanol, and butanol) on the kinetics of hydrolysis and condensation of water-alcohol solutions of tetraethoxysilane at the early stages of the process has been investigated using a technique developed by the authors, which is based on the investigation of the ki…
High voltage circuit breakers utilize the very nature of rapid changing resistance of an electric arc to realize circuit interruption. High speed gas flow in a supersonic nozzle is normally used to ensure arc quenching in the chamber. The thermodynamic and electrical behaviors of arcs burning in such nozzles are close…
We demonstrate a visible light blinded IR detector by using multi-layers of SiO2/TiO2dielectric in a Si based MIS structure. High spectral discrimination among visible light range has achieved due to optical filtering by the SiO2/TiO2multi-layers. Spectral measurements in reflection of SiO2/TiO2multi-layers in terms o…
This paper studies copper oxidation using Transmission Electron Microscopy (TEM) on copper leadframe which was subjected to heat treatment process at 60°C, 120°C, 150°C, 180°C and 210°C for 0.5 hour. The TEM lamella was prepared by in-situ lift-out technique using Focused Ion Beam (FIB) followed by TEM inspection to r…
Extended abstract of a paper presented at Microscopy and Microanalysis 2012 in Phoenix, Arizona, USA, July 29 – August 2, 2012.
Extended abstract of a paper presented at Microscopy and Microanalysis 2012 in Phoenix, Arizona, USA, July 29 – August 2, 2012.
The plasma systems for disinfection/sterilization that we have been working on are mainly based on UV irradiation while most plasma “sterilisers” are calling on ions and radicals. In the latter case, inactivation generally proceeds from erosion of the microorganisms while, in the former case, the UV photons create eno…
In the work, the ferroelectric-ferromagnetic composites were obtained on the basis of a ferroelectric powder of PZT type. Admixtured compositions of PZT type powders constituted ferroelectric, ferroelectric powder (90% of amount), whereas nickel-zinc ferrite (Ni1−xZnxFe2O4) was the magnetic content in the composite (1…
Phase transitions in ferroelectric films of vinylidene fluoride-trifluoroethylene (70/30) copolymer are studied by differential scanning calorimetry (DSC). Films 40 nm thick are prepared from solution by centrifugation. DSC thermograms reveal peaks typical of the first-order phase transition that are associated with h…