Materials Literature
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Abstract Layered double hydroxides (LDHs) are layered ion exchangers, with a large surface-charge density, which react easily with organic anions. Various types of organics are rapidly substituted in the interlayer space of inorganic precursor LDHs. ZnAl-LDHs were intercalated with 1- to 19-carbon monocarboxylic acid…
Glycerol is one of the best studied and most widely used glass-forming liquids; however, its dynamic properties are still under discussion. The dielectric spectra of glycerol are studied in detail over wide ranges of temperatures and pressures up to 4.5 GPa. Starting from the pressures of 2–3 GPa, qualitative change i…
Metal-oxide-metal capacitors based on CaCu3Ti4O12 (CCTO) thin films, grown by metal-organic chemical vapor deposition and presenting a “brick wall” morphology, have been fabricated and characterized. In these capacitors, the coexistence of two Maxwell–Wagner related phenomena, i.e., the internal barrier layer capacito…
A special group of exploitation stresses of electrical insulation systems occurs at PWM (Pulse Width Modulated) inverter supply. The fast switching in PWM drive applications, which has fundamental components 50/60 Hz, produces complex transients that stresses the cable and motors insulation. Such conditions have essen…
The electro-optical properties of the PMN- x PT single-crystal relaxor solid solutions with different PT contents ( x = 6, 10, 13%) and the PLMN-25PT transparent ceramic with a La content of 3%, which has been synthesized for the first time, have been studied at room temperature. It has been shown that the dependence…
A series of 3,3 ’ ,4,4 ’ -diphenylthioethertetracarboxylic dianhydride (s-TDPA), 2,3,3 ’ ,4 ’ -diphenylthioethertetracarboxylic dianhydride (a-TDPA), and 2,2 ’ ,3,3 ’ -diphenylthioethertetracarboxylic dianhydride (i-TDPA) isomer mixtures were synthesized from 3- and 4-chlorophthalic anhydrides. Copolythioetherimides d…
Ga 2 O 3 /ITO films were prepared by magnetron sputtering on quartz glass substrates. The transmittance and sheet resistance of ITO films and Ga 2 O 3 /ITO films were measured by using a double beam spectrophotometer and four point probes. The effect of the ITO layer and Ga 2 O 3 layer thickness on the electrical and…
BiFeO₃ (BFO) single crystals were grown and the effects of Zn and Mn co-doping on the polarization and leakage current properties were investigated at 25 °C for establishing materials design based on defect chemistry. Although Zn doping or Mn doping led to a deterioration in the properties, Zn-Mn co-doping led to a la…
The dependence of partial discharge inception voltage (PDIV) and repetitive partial discharge inception voltage (RPDIV) on some voltage impulse parameters (impulse width, rise time and repetition frequency) is investigated in this paper focusing on crossed pair specimens made of polyimide-amide enameled wires. The res…
The optical conductivity of LaFeAsO, ${\text{BaFe}}_{2}{\text{As}}_{2}$, ${\text{SrFe}}_{2}{\text{As}}_{2}$, and ${\text{EuFe}}_{2}{\text{As}}_{2}$ in the spin-density wave (SDW) state is investigated within density functional theory (DFT) in the framework of spin-polarized generalized gradient approximation (GGA) and…
Corrosion behavior in Zn and Zn-55Al baths were investigated on a Fe-based alloy, which was design to apply to hot-dip production lines as the anti-corrosion alloy. The results reveal that the Fe-based alloy shows excellent corrosion resistance both in pure zinc bath and Zn-55Al bath. And the reaction rate and interme…
In this paper, addition of aluminum in zinc oxide is incorporated using low-temperature chemical synthesis route. Aluminum ions help in crystallization of zinc oxide nanoparticles. Characterization of the synthesized nanoparticles of zinc oxide has been done using Transmission electron microscope (TEM), and X-ray diff…
By means of computer simulation for the flow field, the condition of swirling cavitation formation and the shape of cavitation distribution were analyzed with CFD software. The accuracy of simulation results and the validity of wastewater treatment device were verified according to the testing results of device’s work…
Article Adsorption of PAA on Surface of CaCO3 Particles and its Effect on Dispersion and Fluid of CACO3 Suspensions was published on October 1, 2010 in the journal Journal of Polymer Engineering (volume 30, issue 8).
In this paper, a hard and thin coating with no loose layer was formed on the surface of the aluminum LC4 by bipolar micro-arc oxidation power, and the influence of ratio J of the negative current density to the positive current density on the thickness h and the hardness H of micro-arc oxidation coatings was studied.…
The organo-clays have important industrial uses between others are: rheological additives for drilling fluids in oil bases, inks, glues, lubricants and cosmetics. At the moment and in a growing way, these materials are considered as important reinforcement fillers in the structuring of nano-composites clays/polymers.…
In power distribution networks, polymer insulators commonly show flaws in their interior which cannot be perceived without the use of a non-destructive inspection mechanism. This work describes a methodology based on three-dimensional industrial computer tomography (CT) for the automatic detection of flaws in polymer…
We present detailed results of the self-consistent analysis of carbon nanotube (CNT) field-effect transistors (FET), previously extended by us to the case of multi-walled/multi-band coherent carrier transport. The contribution to charge transport, due to different walls and sub-bands of a multi-walled CNT, is shown to…
Zn electrodeposited directly on the surface of AZ31 Mg alloy was researched in this paper. Zinc fluoride which was dissolved in ammonium citrate solution was used as metal ion source. The interface and morphology of Zn coating were observed by scanning electron microscopy (SEM).The results showed that Zn coating was s…
Owing to non-stable conditions generated during conventional HPHT sintering of cubic boron nitride (cBN) composites, it is not possible to predict both the yield and quality of the final product. Moreover, in the existing conventional technique, the particle size and amount of binding compounds that are associated wit…