Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
(Na0.5Bi0.5)TiO3 (BNT) system ceramics are considered to be an excellent candidate for leadfree piezoelectric ceramics. In this paper, (1–x)Na0.5Bi0.5TiO3-xBaTiO3 (x = 0.03 ~ 0.10) was synthesized by conventional mixed-oxide technique. The powders were calcined at 950oC for 2 h and the pressed disks were sintered at 1…
A series of free-base corroles with different electron-donating or electron-withdrawing substituents were reacted with piperidine, 4-aminopyridine, 2-methylimidazole, 2-aminopyridine or pyridine in PhCN and the UV-visible spectral changes monitored during conversion of ( Cor ) H 3 to [( Cor ) H 2 ] - as a function of…
Planar electric metamaterials are experimentally studied in transmission and reflection utilizing terahertz time-domain spectroscopy. Electrically resonant behavior is observed and provides an estimate of the frequency-dependent transmissivity, reflectivity, and absorptivity of metamaterial composites. Numerical simul…
A new method was applied to modify the surface activity of virginal carbon black (VCB). LA‐57, one kind of hindered amine light stabilizer, was adsorbed onto the carbon black surface through a strong shear force induced by the screws of a HAAKE internal mixer. The modified carbon black (MCB) was characterized by FT‐IR…
This paper presents a fast and accurate phase variable model of single-phase distribution transformers with internal winding short circuit faults. The flux linkages of windings (including the winding formed with the shorted winding turns) are used as the phase variables. Their variation with the winding currents is us…
To investigate the transmission of electromagnetic waves excited by partial discharge through T branch section and L-shaped sections of a gas-insulated switchgear (GIS) bus structure, electromagnetic fields were numerically simulated. The modes of the simulated electromagnetic wave were found to transform to different…
The paper presents the experimental results on accelerated aging of enameled wires with and without nanofiller in the coating under partial discharge (PD) activity. The residual life of the wires, and the surface roughness as measured by a scanning electron microscope (SEM), are used to evaluate the effects of the nan…
Cu∕amorphous BaTiO3∕Cu capacitors were tested for their dielectric properties in the 0.1Hz–100kHz range, from room temperature to 350°C. The amorphous barium titanate dielectric layer was deposited by rf sputtering on water-cooled copper electrodes. The room-temperature dielectric constant is around 18 and the dissipa…
Glass-fibre-reinforced polyester composite plates were treated with an atmospheric pressure dielectric barrier discharge. Synthetic air was used as the treatment gas. The water contact angle dropped markedly from 84 to 22° after a 2-s treatment, and decreased to 0° when the composite plates were treated for more than…
Sulphur hexaflouride (SF6) is generally found to be very sensitive to field perturbations such as those caused by conductor surface imperfections and by conducting particle contaminants. A study of CIGRE group suggests that 20% of failures in gas insulated substations (GIS) is due to the existence of various metallic…
In this study, the influence of a dielectric barrier discharge (DBD) at atmospheric pressure on wood plastic composites (WPC), particle board and fibre boards is investigated by means of contact angle measurements. The water contact angle (WCA) is determined and offers a possibility to detect changes of surface proper…
Microcellular injection molding is capable of producing lightweight, dimensionally stable plastic components with less material and energy. This process allows the material to be processed at lower temperatures and pressures, making it suitable for temperature-sensitive biobased plastics and/or additives. This paper p…
This paper presents a converter topology used to interface a bank of supercapacitors (SC) to a stiff DC-Link, like the one constituted by a typical battery. Main feature of the proposed converter is the reduced ratings of the power electronics switches compared to standard topologies. The capabilities of the proposed…
A floating catalyst chemical vapor deposition (FC‐CVD) method was designed and fabricated to produce high‐quality and ‐quantity carbon nanotubes. The design parameters like the hydrogen flow rate; reaction time and reaction temperature were optimized to produce high yield and purity of Multi‐Wall Carbon Nanotubes (MWC…
This paper proposes a new type of soft matter, namely fibrous materials. The common characteristics of soft matter that are shared by fibrous materials, such as the multiphase composition, porous and highly deformable structures, and the non-negligible contributions of entropy to the material behavior are illustrated.…
A single-crystal X-ray diffraction study in a diamond anvil cell up to 5.41 GPa was carried out on a clinochlore [monoclinic polytype IIb-2, S.G. C2/m, (Mg 9.09 Fe 2+ 1.01 Mn 0.02 Ti 0.01 Cr 0.02 Al 1.80 ) Σ=11.95 (Si 6.35 Al 1.65 ) Σ=8O20 (OH) 16 ] from Val Malenco, Italy. The bulk modulus of monoclinic clinochlore c…
In this paper, the authors describe a simple and inexpensive method for fabricating a superhydrophobic surface on Ti6Al4V alloy substrate without any chemical modification by means of constructing an appropriate surface roughness. Most interestingly, we found that the as-prepared surface has good mechanical properties…
The shell thickness of a BaTiO 3 ceramic with a core–shell structure has been measured by means of synchrotron X‐ray diffraction (XRD). BaTiO 3 ceramic is known from transmission electron microscope (TEM)/energy dispersive X‐ray spectroscopy (EDS) observations to have an inhomogeneous microstructure with cores of a pu…
We have detected a typical relaxor/glasslike dielectric response in the derived lead-free (1−x)K0.5Na0.5NbO3-(x)SrZrO3 ceramic system. In the compositional range 0.10≤x≤0.33, where solid solubility was observed, the system exhibits a broad dispersive dielectric maximum, a Vogel–Fulcher temperature dependence of the ch…
In spite of conventional treatment modalities which include surgery, chemotherapy, and radiotherapy, the survival rates for patients with malignant gliomas remain disappointing. Successful treatment has been limited by difficulties in delivering therapeutic agents to the central nervous system (CNS). Specifically, dru…