Materials Literature
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Abstract There are numerous bentonite deposits, formed by the alteration of volcanic rocks, in the Kapıkaya area (Eskişehir, western Turkey). These deposits can be classified into three groups according to their stratigraphical levels. X-ray diffraction (XRD), scanning electron microscope (SEM), major, rare-earth and…
Uma das principais vantagens do processo MIG/MAG é a alta produtividade. Na maioria das aplicações utiliza-se a polaridade positiva, devido a maior estabilidade do arco, geração de menos respingos e formação de cordões com geometria adequada. No entanto, em algumas aplicações, se demanda uma maior capacidade de produç…
Surface acoustic wave (SAW) propogation in Y-cut and Z-cut relaxor-based 0.67Pb(Mg(13)Nb(23))O(3)-0.33PbTiO(3) (PMN-33%PT) ferroelectric single crystals poled along [001](c) cubic direction has been analyzed theoretically. Characteristic curves were obtained for the phase velocity, electromechanical coupling coefficie…
Barium borate glasses doped with complex Pb 4 Lu 2 YbF 17 fluoride have been synthesized and investigated. Heat treatment produced glass ceramics containing the crystalline BaF 2 :Yb 3+ phase. The changes in the structural and optical properties of the glass ceramics were revealed by X-ray diffraction, Raman spectrosc…
A series of complexes of chitosans of various molecular weights (3000–150000) with copper, iron(II), and zinc sulfates were examined. Participation of amino groups of the polymer in coordination bonding with the metal was proved by IR spectroscopy. The affinity of chitosan for iron ions was enhanced by introducing phe…
A detailed understanding of blasting induced rock damage and fragmentation process is important to blasting design and parameter optimization. Due to the complexity of rock property and damage evolution, it is useful to deal with such problems through statistical methods. In this study, according to the critical fract…
The fracture of a three-dimensional brittle solid generates two-dimensional surfaces, which are formed behind a one-dimensional crack front. For quasi-static cracks on a (111) cleavage plane in silicon front propagation by kink-pair formation was proposed and proven by a reaction pathway analysis with Stillinger-Weber…
Planothidium engelbrechtii (CHOLNOKY) ROUND et BUKHT. was originally described in 1955 from South Africa as Achnanthes engelbrechtii CHOLNOKY. It became necessary to revise the original type material because of some discrepancies between the original description and figures and the current allotment of this species to…
(1-x)(Bi(0.9)La(0.1))FeO(3-x)PbTiO(3) (BLF-PT) crystalline solutions for x = 0.35, 0.37, 0.4, 0.43 and 0.45 have been prepared by the solid-state reaction method. The X-ray diffraction analysis shows that BLF-PT has a single perovskite phase with mixed tetragonal and rhombohedral phases between x = 0.4 and 0.43. The C…
Abstract The purpose of this work is to find out the performance of seams after successive treatments applied to fabric. Performance of seams is given by their load/elongation behaviour. In this study, woven fabrics are chosen to investigate the effect of their chemical and mechanical finishing process (desizing, scou…
A hybrid power pack consisting of batteries and ultracapacitors has the advantage of combining high energy capability (batteries) with high power capability (ultracapacitor). This paper suggests a new scheme for combining batteries and ultracapacitors with new modes of operation. The scheme supports high speed dynamic…
A series of new Gd(III) hydroxypyridonate complexes featuring a mesitylene (ME)-derived ligand cap has been prepared. Relaxometric characterization reveals that the complexes tend to form large aggregates in solution with slow tumbling rates, as estimated from NMRD analysis, and unique pH-dependent relaxivities. The s…
A method for measuring the dielectric permittivity of diamond powder is developed. It is shown that variation of particle sizes of diamond powder can purposefully change its dielectric properties.
Emission and excitation spectra of Cs(2)NaLnCl(6) (Ln = Y, Eu, Gd, Er, Yb), Cs(2)NaYCl(6):Ce and Cs(2)NaYCl(6):Tm have been recorded using synchrotron radiation. With the possible exception of the case for Ce(3+), no [Formula: see text] transitions are observed and the emission spectra are entirely assigned to [Formul…
Abstract Co‐crystals may open the door to product tailoring of pharmaceutical products. Selected pharmaceutical ingredients were co‐crystallized by mechanical and supercritical methods and the products were characterized by means of X‐ray diffraction (XRD) using synchrotron radiation. The experiments revealed sub‐micr…
Structural and Magnetic Properties of Fe-Doped Anatase TiO2 Films Annealed in Vacuum, Xu Jian-Ping, Li Lan, Lv Li-Ya, Zhang Xiao-Song, Chen Xi-Ming, Wang Jian-Feng, Zhang Feng-Ming, Zhong Wei, Du You-Wei
Supercapacitors, also known as ultracapacitors, are commonly based on porous activated carbon electrodes and electrostatic charge storage mechanisms. Carbon electrodes are supposed to be chemically and electrochemically inert and the electrostatic nature of the charge storage mechanism is highly reversible. These prop…
Random phthalide-containing poly(arylene ether ketones) have been synthesized. The properties of the polymers have been studied by the thermostimulated-current and thermostimulated-depolarization methods. An extremal dependence of the electrophysical properties on the content of phthalide groups in macromolecules is o…
Weight loss and polarization methods were used to study the corrosion-inhibiting effect office essential oils on mild steel in hydrochloric acid (HCl) environments. In both methods, maximum inhibition efficiency was observed at 4% concentration of the inhibitors in the acid of highest strength.
The fluororubber/silicone rubber blends were prepared by using fluororubber grafted by γ-methacryloxypropyltrimethoxysliane as a compatibilizer. Fourier transform infrared Spectra revealed that γ-methacryloxypropyltrimethoxysliane has been grafted onto fluororubber backbone. The effect of the compatibilizer content on…