This article presents the characterizations of BaO.SrO.xFe2O3 and BaO.SrO.xFe3O4 (x= 5.6, 5.8, 6) hexaferrites. We have used hematite of analytical grade and magnetite from Cox’s Bazar beach sand mineral to prepare these samples. Structural characteristics of the compositions have been revealed by the Scanning Electron Microscopic (SEM) tests. Magnetic characterizations have been performed by the Vibrating Sample Magnetometer (VSM) test and Mossbauer spectroscopy. From VSM test, we have determined the hysteresis parameters of the samples. The Curie temperatures of those hexaferrites have been obtained from the temperature dependent magnetic moments. The Mossbauer study indicates that the samples are in the ferromagnetic state and they are hexagonal ferrites.

This study focused on the phase study of titanium dioxide (TiO2) nanotube fabricated via anodization in HF solution. The objectives of this study is to observe the structure of nanotube formed after anodizing the titanium foil at different pH using field emission-scanning electron microscope and to analyze the different phases of TiO2 heat treated at different temperature using X-ray diffraction tool. In order to form the TiO2 nanotube, various parameters were used during the anodization process. The parameters include pH value of the HF solution, anodizing time, and applied potential. The pH of HF solution used is 1, 5 and 9 for 10 minutes time duration at 20 V. The TiO2 nanotubes were heat treated at temperatures of 300, 500 and 700?C with soaking time of 3 hours and cooling rate of 5?C/min in a tube furnace to produce different phase of titanium dioxide. Phase identification from the titanium dioxide characterization indicates the presence of rutile and anatase peaks. The optimal condition for TiO2 nanotubes formation was pH 5 with an applied potential of 20 V

The article contains a brief history of amorphous materials. Information on the properties of these materials is provided and the criteria for amorphous materials produced by A. Inoue are discussed. Two selected methods of producing fast-cooled alloys have been characterized. The melt spinning method and the centrifugal casting method have been described by providing appropriate apparatus diagrams. In addition, the article describes processes of initial preparation of feed materials for the production of fast-cooled alloys and describes the process of forming a polycrystalline ingot. Selected methods of investigating structure of amorphous materials are described: X-ray diffraction and mossbauer spectroscopy.

This study aims to review in situ corrosion tests and evaluated some characteristics of complex composite layers based on powders Ni21Cr11Al2.5Y1Co with 3%WC. These powders presenting agglomerate WC man-sized cluster particles and are used as an option for coating geothermal carbon steel components to prevent extensive erosion-corrosion fen omen. The powders are used to protect steel components by multilayer thermal spraying HVOF deposition. The experimental procedure involved obtaining X-ray diffraction patterns of the specimens, profilometry images of erosion-corrosion tests and SEM investigation to provide detailed information about adhesion of protective layers and morphological modifications.

The present study reports the structural, morphological and magnetic properties of 80 keV N ion implanted CeO2 thin films deposited over Al2O3 substrates by RF sputtering technique. The implantation was carried out at the fluence of 1×1016 ions/cm2 , 3×1016 ions/cm2 and 6×1016 ions per cm2 , respectively. X-ray diffraction analysis confirmed the formation of face- centered cubic (FCC) structure corresponds to CeO2. The surface morphology images indicate the increase in surface roughness value of the thin films after N ion implantation. The saturation magnetization in pristine thin film is found more as compared to N ion implanted films. It is observed that the saturation magnetization suppresses after N ion implantation. F- center exchange mechanism which is based on defects such as oxygen vacancies play significant role behind such ferromagnetic behavior.

A single source precursor, tantalum tin acetylacetonate was prepared and characterized by Fourier transform infrared (FTIR) spectroscopy. Tantalum tin oxide thin film was deposited on ITO coated glass substrate through spin coating of the single source precursor solution and annealed at a temperature of 420 o C.The deposited film was characterized using Rutherford backscattering spectroscopy (RBS), scanning electron microscopy (SEM), X-ray diffractometry (XRD), optical absorption spectroscopy, and four point probe technique. RBS analysis showed that the film have a stoichiometry of Ta0.2Sn0.8O2 and thickness of 8.225 nm. SEM micrograph of the film revealed closely packed grains which are well distributed over the entire substrate while the XRD indicated strong reflections from planes that correspond to both tetragonal rutile SnO2 and Ta2O5 structures. The absorption behavior of the deposited thin film was relatively stable under different temperature with direct optical band gap between 3.44 and 3.54 eV. The resistivity was found to be of the order of 10-4 ?-cm.