(57)Fe Mössbauer spectra have been recorded from the hexagonal (6H)- and trigonal (15R)- modifications of BaFeO2F and are compared with those previously recorded from the cubic form of BaFeO2F. The spectra, recorded over a temperature range from 15 to 650 K show that all of the iron in all the compounds is in the Fe(3+) state. Spectra from the 6H- and 15R-modifications were successfully fitted ...

nanocrystalline particles of barium hexaferrite has been prepared by the sol–gel auto- combustion method using iron and barium nitrate with a ba:fe molar ratio of 1:10. the effect of fuel such as citric acid and aspartic acid was investigated on the structure and magnetic properties of nanoparticles. the results revealed that the formation of barium hexaferritefine particles is influenced by mo...

Piezoelectric polymer fibers offer a fundamental element in intelligent fabrics with their shape adaptability and energy-conversion capability for wearable activity health monitoring applications. Nonetheless, realizing high-performance smart faces technical challenge due to the relatively low piezoelectric performance. Here, we demonstrate yarns simultaneously equipped structural robustness me...

Barium studies investigations (barium swallow, barium meal and barium enema) are the basic routine radiological examination, where barium sulphate suspension is introduced to enhance image contrast of gastrointestinal tracts. The aim of this study was to quantify the patients' radiation doses during barium studies and to estimate the organ equivalent dose and effective dose with those procedure...

With the increasing application of barium titanate (BaTiO3) in polyvinylidene fluoride (PVDF), evaluation its dielectric properties has attracted attention many frontier scholars. In this paper, from theoretical point view, effects aspect ratio and concentrations BaTiO3 nanowires on macroscopic were studied by finite element method. Depending calculation results, some conclusions had been obtai...

statement of the problem generally, the main source of fluoride intake is drinking water. excessive consumption of bottled water as a substitute or in addition to the tap water supply may have implications for safe fluoride supplementation. in this study, fluoride contents in six commercial brands of bottled water were measured materials and methods six different brands of bottled drinking wate...

pure barium zirconate nanopowders were successfully prepared in wet-chemistry synthesismethod, using barium stearate and tetra-n-butyl zirconate as ba, zr sources and stearic acid ascomplexing reagent. the gel was calcined at 800 and 900 °c in air. results of thermal analysisare given, including both dtg and tg. fourier transform infrared spectrometry (ftir), x-raydiffraction (xrd), transmissio...

Hydrothermal and commercial barium titanate powders were examined for undesirable impurity phases. Compositional differences in the powder were evaluated using x-ray diffraction ( XRD ), x-ray fluorescence ( XRF ), and x-ray photoelectron spectroscopy (XPS). A brium-rich impurity phase, virtually undetectable by XRD, was detected via XPS. Barium impurity phase peaks were detected at binding ene...

A new hexagonal polymorph of BaTa2O6 and a novel salt inclusion phase, [Ba3F]Ta4O12F, were obtained via high temperature flux crystal growth using mixed alkali chloride/alkali fluoride fluxes. [Ba3F]Ta4O12F crystallize in the tetragonal space groups P6/mmm P42/mnm, respectively. The structure consists TaO6 octahedra that edge-share equatorial O(2) to form Ta2O10 dimers further connect 3D contai...