Materials Literature
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PZT thin films were successfully prepared through sol-gel. The annealing temperature was confirmed through DTA analyzing. The trigonal and tetragonal phase transition was analyzed through Raman scattering. The intensity of the A 1 (2TO) mode and the A 1 (3TO) T mode were enhanced with the increase of the annealing tem…
Abstract 2,4,6,8,10,12‐Hexaallyl‐2,4,6,8,10,12‐hexaazaisowurtzitane (HALLIW) was obtained in a condensation reaction of glyoxal with allylamine in the presence of a protonic acid as a catalyst. Optimization of the synthesis was accomplished by means of a mathematical experiment planning theory with the steepest descen…
Problem statement: This study involved an investigation to ascertain the diffusion of NiO and ZnO into the tetrahedral and octahedral sites using mechanical alloying method. The effect of mechanical alloying towards particle size was also reported. Approach: NiO, ZnO and Fe2O3 precursors were mechanically alloyed to s…
In this paper, high voltage, which was raised step by step, was taken on an oil wedge model. Partial discharge (PD) signal was measured by normal IEC 60270 method. And the carbon trace on the pressboard was checked. Using Weibull function, the changes on the type of the PDs, were analyzed. Furthermore, the relationshi…
The compound 2-APPy [1-(2-aminophenyl)pyrrole] as an organic phase in an inorganic–organic semiconductor interface (IOI) assembly was the subject of photoelectrochemical studies in aqueous solutions. Results show that thin films of poly(2-APPy) can be prepared using oxidative electropolymerization. Furthermore, absorp…
The structure, phase composition, and magnetic properties of carbon nanotubes filled with iron nanoparticles and obtained by thermolysis of a mixture of ferrocene and C 60 fullerene or ferrocene and orthoxylene at a temperature of 800°C are investigated. Electron microscopy, X-ray diffraction, and Mössbauer spectrosco…
The methods of reaching a high hardness, which is the main characteristic determining the service resistance of rolling tools (sheet mill rolls, cogging-down rolls, the mandrels of cold-rolling tube mills, etc.), in low-alloy hypereutectoid steels are theoretically grounded. The “ultrahigh hardness” effect is shown to…
The introduction of porosity into ferroelectric ceramics has been of great interest in recent years. In particular, studies of porous lead-zirconate-titanate ceramic (PZT) have been made. In the research reported, samples of Ferroperm Pz27 with porosities of 20, 25 and 30% were studied. Very complete measurements were…
The by-products of dicumyl peroxide (DCP) from the crosslinking process such as acetophenone, cumyl alcohol and α-methylstyrene are said to be the sources of space charge formation in XLPE cable due to deep traps in the chemicals. However, by using space-charge-experimental approach, it appeared that these chemicals s…
Abstract The structural, electronic and elastic properties of the cubic boron nitride (BN) compound are investigated by a first-principle pseudopotential method. The calculations show that the structural phase transition from the zinc-blende(ZB) structure to the rocksalt (RS) structure occurs at a transition pressure…
The anionic polymerization of acrylonitrile in DMF initiated by lithium 1,2-bis(diethylamino)-2-oxoethanolate in the range −60 to 0°C has been studied. The initiator efficiency at low temperatures (−60 to −40°C) is 2–6%; it remains nearly invariable with conversion owing to the associated state of the initiator. The l…
High-yield pulp (HYP) and recycled fibers containing anionic trash are being used increasingly in the manufacture of various paper grades. Traditionally, anionic trash catchers (ATCs), such as PEI, CPAM, and poly-DADMAC, are used to minimize the anionic trash problem. In this work, we studied an alternative ATC, highl…
ESR, IR and optical absorption studies on 60B 2 O 3 -10TeO 2 -(30-x)MO-xPbO (where M=Zn, Cd) glasses containing Cu 2+ spin probe have been carried out. The IR results prove the distribution of trigonal bipyramids (TeO 3 ) which determines the network and the distribution of borate triangles (B0 3 ) and borate tetrahed…
Recently, a single-phase CCFL (cold cathode fluorescent lamp) driving method has been adopted to provide a low cost implementation. However, whereas dual-phase driving compensates the coupling effect on the pixel electrodes, single-phase high voltage driving signals are coupled to pixel electrodes through parasitic ca…
A porous NiO/yttria-stabilized zirconia anode substrate for tubular solid oxide fuel cells was prepared by gel casting technique. Nano-scale samaria-doped ceria (SDC) particles were formed onto the anode substrate to modify the anode microstructure by the impregnation of solution of Sm(NO3)3 and Ce(NO3)3. Electrochemi…
In present paper application of computer vision techniques to propeller cavitation experiments is presented. These techniques are widely adopted in many different environments and therefore they are well documented. They are also attractive from an economic point of view, due to relative low cost of the hardware invol…
Abstract In situ photoluminescence spectroelectrochemistry was carried out for single-walled carbon nanotubes (SWNTs) having nine different chiral indices and their oxidation potentials have been determined based on the analysis using the Nernst equation.
Manganese tetraphenylporphyrin supported on nano- TiO 2 has been synthesized and structurally characterized. It has been shown to have excellent catalytic activity for the aerobic oxidation of α-pinene. Experimental results showed that this much-enhanced activity could arise from possible co-catalysis between metallop…
Abstract The immobilization of trypsin onto various commercial silica gels was studied. Silica gels were used directly and characterized by mercuric porosimetry. Agitation rates (100–740 rpm) and particles size (35–75 to 250–500 μm) of silica gels did not affect the trypsin immobilization capacity. The pore size (3 to…
Ignitor is a nuclear fusion experiment aimed at studying Deuterium-Tritium plasmas. If European proposed waste management strategies were applied, all Ignitor radioactive materials could be recycled or declassified to non-radioactive material. We have applied the Italian waste management regulations to the IGNITOR exp…