Materials Literature
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Abstract Salt leaching technique has been employed to produce polycaprolactone (PCL) based porous tubular matrix. Salt was dispersed into PCL solution in chloroform and the subsequent leaching of salt was accomplished in water. The effect of salt and polymer concentration on the mechanical properties, porosity and sur…
The accumulation of fly ash leads to severe problems in ecological environments. Various ways to excite the activity of fly ash in Portland cement based cementitious materials have been carried out for many years. In the present study, effect of large volume of fly ash in phosphate cement was studied. Dead burned magn…
CONTEXT: Remelting previously cast base metal alloy can adversely affect the mechanical properties of the alloy and necessitates addition of new alloy. AIMS: To study the effect of remelting different combinations of new and used cobalt-chromium (Co-Cr) alloy on its mechanical properties and microstructure. MATERIALS…
Vorlanite, cubic CaUO 4 heated at temperatures above 750 °C, transforms irreversibly into rhombohedral CaUO 4 , proving that the latter crystallized as a precursor of vorlanite in high-temperature skarns, Vorlanite most probably originated due to pseudomorphic transformation of rhombohedral CaUO 4 , caused by disorder…
The present paper reports on the preparation and analysis of LiNbO3 (LN) ceramic powder by a conventional chemical co-precipitation method. An aqueous mixture of ammonium carbonate along with ammonium hydroxide has been used. Lithium niobate ceramic powders have been sintered at 600, 700, 800, 900 and 1000°C, respecti…
Recently, hybrid cache architecture has become illuminated. As heterogeneous memory dies are stacked, it improves the performance of microprocessor enhanced in terms of power consumption and processing speed. This paper analyzed the hybrid cache architecture using different programs and memory types. SRAM is fixed for…
The magneto-acoustic behavior of the rare-earth multiferroic Nd0.75Dy0.25Fe3(BO3)4 in external magnetic fields lying in the basal plane of the crystal is studied. The data confirm the existence of a magnetic anisotropy in this plane and of magnetic phase transitions in the crystal caused by this anisotropy. H-T phase…
Silicon, boron, and zirconium boride coatings on graphite have been obtained by thermal treatment of the initial components in air. During the course of the chemical reactions, a glass melt encapsulating (wrapping) the initial particles is formed, which makes it possible to create an air barrier preventing the diffusi…
Pyrrole was polymerized in the presence of anhydrous ferric chloride as oxidant and p-toluene sulphonic acid as dopant. Polypyrrole-coated short Nylon fibers were prepared by polymerizing pyrrole in the presence of short Nylon fibers. The resultant polypyrrole (PPy) and polypyrrole-coated Nylon fiber (F-PPy) were char…
The utilization of radio-frequency (RF) superimposed direct-current (DC) magnetron sputtering deposition on the properties of gallium doped ZnO (GZO) based transparent conducting oxides has been examined. The GZO films were deposited using 76.2 mm diameter ZnO:Ga2O3 (5 at. % Ga vs. Zn) ceramic oxide target on heated n…
A novel method for preparing fine magnetite nanoparticles without using any additives and organic solvents has been developed. In this method, a sequential precipitates formation method, ferrous and ferric hydroxides are not coprecipitated but sequentially formed in an alkaline solution, and then the resulting suspens…
Dependences of the relative permittivity on the external bias electric field of ceramics of the y PZN- m PMN- n PNN- x PT ( x = 0.25–0.40) system have been studied. The evolution of domain processes during the concentration transition from classical ferroelectric to relaxor ferroelectric has been shown. Tentative conc…
Solid tumors constitute the majority of diagnosed cancers. For effective killing, therapeutic agents should ideally be delivered uniformly and at lethal doses to all cancer cells comprising the tumors, while keeping normal organ toxicities to a minimum. This requirement sets two of the major challenges in drug deliver…
Recent development in miniaturized electronic devices has increased the demand for power sources that are sufficiently compact and can potentially be integrated on a chip with other electronic components. Miniaturized electrochemical capacitors (EC) or micro-supercapacitors have great potential to complement or replac…
In this paper, two microstrip transmission line based metamaterial structures (sub-wavelength sized resonators) are designed and implemented in near field sensing of dielectric materials. One structure is designed for band-stop and the other for band-pass performance in the X-band region. These resonators load the mic…
The phase change active material exploration represents an important stage in order to further strengthen the know-how on the Phase Change Memory (PCM) technology. This work reports a path for PCM material exploration toward the tellurium poor region of the GeSbTe (GST) ternary compound system. Data retention enhancem…
The phonon dispersion of graphene is derived by using a simple mass spring model and considering up to the first, second, third, and fourth nearest-neighbor interactions. The results obtained from different nearest-neighbor interactions are compared and it is shown that the k 2 dependence for the out-of-plane transver…
Powder blends of low-density polyethylene with cellulose and ethylcellulose were obtained under high-temperature shear deformation conditions in a rotor disperser at various initial reagent ratios. The composition of powder fractions was shown to be identical to the initial blend composition, which was evidence that t…
β -Zn 4 Sb 3 has attracted much interest as a thermoelectric material because of its potential for power-generation applications in a moderate temperature range (450 ∼ 650 K). In general, three kinds of considerations have been reported for the fabrication of a polycrystalline β -Zn 4 Sb 3 bulk sample: (i) a problem i…
Effect of rapid quenching on the magnetic state and magnetocaloric properties of the Gd3Co and Gd3Ni intermetallic compounds has been studied. The rapidly quenched Gd75Co25 and Gd75Ni25 alloys were found to exhibit a ferromagnetic behavior below the Curie temperature T C = 172 and 117 K, respectively, whereas their cr…