نتایج جستجو برای: barium fluoride

تعداد نتایج: 28441  

Journal: :Journal of physics. Condensed matter : an Institute of Physics journal 2016
Oliver Clemens José F Marco Michael F Thomas Susan D Forder Hongbin Zhang Simon Cartenet Anais Monze Paul A Bingham Peter R Slater Frank J Berry

(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 ...

Journal: :international journal of nano dimension 0
s. abedini khorrami department of chemistry, azad university, north tehran branch, tehran, iran. r. islampour department of chemistry, azad university, north tehran branch, tehran, iran. h. bakhtiari department of chemistry, azad university, north tehran branch, tehran, iran. q. sadr manuchehri naeini department of chemistry, azad university, north tehran branch, tehran, iran.

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...

Journal: :EcoMat 2023

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...

Journal: :Radiation protection dosimetry 2011
A Sulieman M Elzaki C Kappas K Theodorou

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...

پایان نامه :0 1370

all analytical methods are generally based on the measurement of a parameter or parameters which are somehow related to the concentration of the species.an ideal analytical method is one in which the concentration of a species can be measured to a high degree precision and accuracy and with a high sensitivity. unfortunately finding such a method is very difficult or sometimes even impossible.in...

Journal: :AIP Advances 2021

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...

Journal: :avicenna journal of dental research 0
t massum pedodontist, private practice, iran f mojarrad associate professor, department of pediatric dentistry , faculty of dentistry, ham a dan university of medicalسازمان اصلی تایید شده: دانشگاه علوم پزشکی همدان (hamadan university of medical sciences) k khodakarami dentist

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...

Journal: :journal of the iranian chemical research 0
morteza enhessari department of chemistry, islamic azad university, naragh branch, naragh, iran salah khanahmadzadeh department of chemistry, faculty of science, islamic azad university, mahabad branch,, mahabad, iran keyvan ozaee young researchers club, islamic azad university, naragh branch, naragh, iran

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...

2014
R. E. Riman

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...

Journal: :Journal of Solid State Chemistry 2021

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...

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