Materials Literature
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The effect of temperature on ferroelectric and piezoelectric behaviour of multiferroic ceramics (1 mol% Mn-doped 0.75BF-0.2BT) was investigated under an electric field at various temperatures (30 to 200°C). The polarization hysteresis loop and strain loop of ceramics were investigated at various temperatures. The effe…
BiFeO3 ceramics doped with varying amounts of SrO-B2O3-SiO2 glass, i.e., xwt% (x = 0, 0.2, 0.4, 0.6, 0.8) have been successfully developed via a solid state reaction route. Phase identification using XRD showed that a relatively pure BiFeO3 phase could be obtained at the reaction temperature of 760° for 2h. The sinter…
We theoretically and experimentally explored the electromagnetically induced transparency (EIT) mode-coupling in terahertz (THz) metamaterial resonators, in which a dipole resonator with a super-radiative mode is coupled to an inductance-capacitance resonator with a sub-radiative mode. The interference between these t…
The main objective of this study is to explore the deformation feature and damage pattern of a steel plate under the synergetic effects of blast and fragments loading. The combined blast and fragments loading effects under the condition of cast TNT and prefabricated fragments acting on a steel plate, are sim-ulated us…
First-principles calculations have been performed to study the interaction of oxygen with UN(001) surface. The molecule oxygen was found to dissociate spontaneously on all considered adsorption sites on the surface. Atomic oxygen (O) preferred to adsorb on a hollow site or the top of uranium ions, which were energetic…
Bi3TiNbO9 (BTN) is an important member of the Aurivillius bismuth layer-structured ferroelectric compounds, consisting of [Bi2O2]2+ layers between which [BiTiNbO7]2- layers are inserted. Ho3+ and Yb3+ co-doped Bi3TiNbO9 (BTN) ceramics were synthesized by a conventional solid state reaction method and their up-conversi…
Carbon nanotubes are of wide interest due to their excellent properties such as tensile strength and electrical and thermal conductivity, but are not, when placed alone on a substrate, well resistant to mechanical wear. Diamond-like carbon (DLC), on the other hand, is widely used in applications due to its very good w…
A2B-type meso-(4-nitrophenyl)-substituted subporphyrins have been synthesized and shown to undergo very fast photoinduced intramolecular charge separation (CS) and charge recombination (CR) between the subporphyrin core and the meso-4-nitrophenyl group in CH2Cl2 as probed by femtosecond time-resolved transient absorpt…
Studies of the optical properties of poly(hydroxy imide) (HPI) exposed to stepwise heating from room temperature up to 400 °C are reported in this work. It is demonstrated that this new method can be used to monitor thermal rearrangement (TR) of HPI to polybenzoxazole (PBO). Temperature dependences of the absorption e…
The formation of monolayer graphene oxide dispersing hydrogen bonded benzoic acid liquid crystals (GDHBLC) nanocomposite film was successfully fabricated by wet chemical solution casting process. We are introducing soft self-assembly of liquid crystalline materials (LC) comprising azelaic acid (AC) with p-n-alkyloxy b…
Influence of NaCl/LiF additives (with molar ratio of 0.58:0.42) on phase formation, unit cell parameters, microstructure, dielectric and ferroelectric properties of (K0.5Na0.5)NbO3 ceramics has been studied. Intensification of the sintering process and a decrease in the unit cell parameters were proved. Enhancement of…
In cement production, which involves the production of cement clinker in rotary kilns, the main refractories used are magnesia-spinel bricks. These bricks may suffer infiltration by the clinker liquid phase, resulting in the corrosion of the spinel and the formation of low refractoriness mineralogical phases, such as…
Abstract In our previous study, we realized conformal, subconformal, and anisotropic deposition profiles of hydrogenated amorphous carbon (a-C:H) films formed on trench substrates by plasma CVD using toluene. To obtain information on the film structures, we investigated the effects of deposition rate and ion bombardme…
Automated image analysis of textile surfaces allowed determination and quantification of intrinsic yarn path variabilities in a 2/2 twill weave during the lay-up process. The yarn paths were described in terms of waves and it was found that the frequencies are similar in warp and weft directions and hardly affected by…
ABSTRACT Core–shell structured bamboo–plastic composites (BPCs) were directly prepared with a single‐screw/single‐screw coextruder system. The effects of different shell layers, such as high‐density polyethylene (HDPE), bamboo pulp fiber (BPF)/HDPE, and white mud (WM)/HDPE, were studied in the context of the mechanica…
Recent years have witnessed a large volume of works on the modification of graphene; however, an understanding of the associated morphology or mechanical properties changes is still lacking, which is vital for its engineering implementation. By taking the C 4 F fluorination as an example, we find that the morphology o…
Rechargeable batteries composed of metallic Mg negative electrode, glyme-based electrolytes and organic positive electrode (2,5-dimethoxy-1,4-benzoquinone (DMBQ)) were proposed. The charge-discharge performance of the batteries was investigated using a coin-type cell at 30˚C. The discharge capacity reaches ca. 200 mAh…
The composite ceramics of (1-x)BaTiO3-xBaFe12O19 (x = 0.2, 0.4, 0.5 and 0.6) were prepared by solid state method. The phase formation and diphase microstructure of the composite samples were examined by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results indicated that ferroelectric BaTiO3 can…
Microcrystalline cellulose powder was prepared from banana pseudostem fibres. The conventional method for preparing cellulose powder requires cooking of raw material with high concentration of alkali followed by washing, bleaching and grinding. In this study cellulose powder was prepared by a method which was develope…
A poly( N, N-dimethylaminoethyl methacrylate) nonwoven was produced by the blowing out technique. The basic structural and mechanical properties of the obtained material were measured and described. It was found that the formed nonwoven has a smooth and delicate structure with quite weak mechanical properties. Its ant…