Materials Literature
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Al2O3-ZnO nanocomposite was synthesized by the sol-gel pyrrolysis method and characterized by SEM, TEM, EDAX analysis, XRD patterns, and Brunauer-Emmet-Teller (BET) specific surface area measurements. The optimized sample with uniform morphology and smallest particles sizes can be synthesized with 8%wt PVA, 4%wt Alumi…
A novel CuO-TiO 2 composite photocatalyst was prepared by a redox process coupling with sol-gel method. The morphology and structure of the as-prepared samples were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Photocatalytic activity of the CuO-TiO…
High-density polyethylene (HDPE)/silica composites with different silicon dioxide fraction were prepared by the melting blend method. The effects of silicon dioxide content on the thermal properties and mechanical properties were mainly investigated. The results show that the thermal degradation of the composites shif…
Hydroalcoholic extract of Pycnocycla spinosa has spasmolytic effect in vitro and antidiarrhoeal action in vivo. The aim of this research was to separate fractions of total hydroalcoholic extract of P. spinosa guided by their spasmolytic activity. Aerial parts of P. spinosa were extracted with ethanol. The concentrated…
The crystal structure and magnetic properties of Bi1 − x A x FeO3 − x/2 (A = Ca, Sr, Pb, Ba), Bi1 − x A x (Fe1 − x Ti x )O3, and Bi1 − x A x (Fe1 − x/2Nb x/2)O3 solid solutions have been studied. It is shown that the homogeneous polar weak ferromagnetic state occurs in the vicinity of a morphotropic phase boundary in…
A four-level Fresnel lens and piezoelectric transducer were fabricated as an ejector using focused ultrasonic energy. The influence of the fabrication parameters on the profile of the focusing lens was investigated. Highly c -axis (002)-oriented ZnO films were successfully deposited on Pt (annealed)/Ti/SiO 2 /Si subst…
We propose a method for the measurement of the diameter fluctuation of acoustic cavitation bubbles in the spatial frequency domain using an optical spectrometer. Acoustic cavitation bubbles are generated by ultrasound radiated into the water. The spatial spectrum of the oscillating bubbles is captured and the diameter…
Various reaction parameters for the graft copolymerization of Hibiscus sabdariffa fiber with methyl acrylate, ethyl acrylate, butyl acrylate, and acrylonitrile monomer were optimized using ceric ammonium nitrate-nitric acid as initiator system. The graft copolymers thus obtained were characterized by SEM, FT-IR, and X…
Extended abstract of a paper presented at Microscopy and Microanalysis 2011 in Nashville, Tennessee, USA, August 7–August 11, 2011.
Crystal structure and electrical properties were investigated for Bi (Mg0.5Ti0.5)O 3 films grown on (111) c - and (100) c -oriented SrRuO 3 //SrTiO 3 substrates by pulsed laser deposition. Epitaxial films consisting of a single phase of perovskite were obtained on the (111) substrates. Additionally, the ferroelectrici…
The effect on densification and mechanical properties of 3 mol% Y-TZP ceramics doped with zinc oxide (0.1 wt.% to 1 wt.%), has been investigated in this study. Green samples were compacted by uniaxial pressing and cold isostatically pressed at 200 MPa. All samples have been sintered over the temperature range of 1250°…
Recently, it has been shown possible to construct an (almost) dispersionless active ENZ metamaterials and transmission lines based on non-Foster elements. These structures are inherently extremely broadband (several octaves) and they may support counter-intuitive superluminal phase and group velocities. However, causa…
High purity Al 2 O 3 powder was used as raw material and MgO was used as additive to sinter alumina transparent ceramics in hydrogen atmosphere. EBSD image showed that, with the increase of the MgO content, the grain size decreased from 200μm (when no Mg was doped) to about 20μm (when the Mg doping amount was 1.0wt%),…
Microcellular foam injection parts have many advantages such as saving material and energy, reducing cycle time, and processing excellent dimensional stability. Despite these advantages, the low surface quality problems limit its application scope seriously. In this study, the microcellular foam injection molding prin…
It is well known that graphene is a very promising material due to its excellent physical, chemical, and thermal properties. Previously, ridges in graphene on a substrate were found in epitaxial graphene on a SiC substrate. It was found in this study that ridges can be made on a graphene layer via mechanical exfoliati…
Oxide ceramics such as alumina and zirconia are industrially utilized as cutting tools, a variety of bearings, biomaterials, and thermal and corrosion-resistant coatings due to their high hardness, chemical inertness, high melting point, and ability to retain mechanical strength at elevated temperatures. In this resea…
The use of tungsten as a plasma-facing material necessitates a transition joint to the structural material of the primary coolant loop at some location in order to transport the coolant to the heat exchanger. A critical issue in transition joints is the thermal expansion mismatch between materials, which can lead to u…
Extended abstract of a paper presented at Microscopy and Microanalysis 2011 in Nashville, Tennessee, USA, August 7–August 11, 2011.
Morphology, crystallinity and electrochemical properties of Si powders fabricated by a mechanical milling process with milling time of 6-40 h were investigated by means of FESEM, XRD, Raman, TEM and cell test. Average size of Si powders was reduced to sub-micrometer scale after 10 h-milling and 40 nm-Si powders could…
We study electrons tunneling through a double-magnetic-barrier structure on the surface of monolayer graphene. The transmission probability and the conductance are calculated by using the transfer matrix method. The results show that the normal incident transmission probability is blocked by the magnetic vector potent…