نتایج جستجو برای: xrd fe sem

تعداد نتایج: 151724  

Journal: :journal of sciences, islamic republic of iran 2012
h. karimi m. razmara

interactions between cd, pillared clays and chalcogenedies have been studied using nanomineralogical experiments. xrd, dsc and chemical analysis. the synchrotron-based x-ray absorption spectroscopy (xas) was applied to characterize the reaction phases. the mean bond lengths between, cd-s, fe-s, sb-s, cd-cd (in chalcogenedies), al-cd, cd-ti, and fe-cd, (in pillared clays) were determined by xas ...

Journal: :iranian journal of chemical engineering 0
behrang izadkhah department of applied chemistry and chemical engineering, university of tabriz, tabriz, iran. aligholi niaei department of applied chemistry and chemical engineering, university of tabriz, tabriz, iran. ali tarjomannejad department of applied chemistry and chemical engineering, university of tabriz, tabriz, iran. daryush salari department of applied chemistry and chemical engineering, university of tabriz, tabriz, iran.

in this paper, labo3 perovskite type catalyst formulations were prepared by sol-gel auto combustion method using citric acid as the fuel. activity of catalysts was tested in catalytic oxidation of toluene as a model of volatile organic compounds. lacoo3 perovskite formulation showed the highest activity among labo3 (fe, mn and co) perovskite catalysts. so, lacoo3 perovskite based catalyst was s...

Journal: :Jurnal Ilmiah Berkala Sains dan Terapan Kimia 2022

Semiconductors have conductivity levels between insulators and conductors which can be applied in various fields such as photocatalytic, adsorption, Dye Sensitizer Solar Cell (DSSC). However, some semiconductors are only active under ultraviolet light, therefore to improve their utilization, modifications made by producing a hybrid combination of two or more materials dopping materials. This st...

Journal: :Journal of Scientific Research 2021

Polycrystalline nanostructured PbS thin films are deposited onto soda-lime glass substrates by the method of chemical bath deposition (CBD) at different duration time. The structure and surface morphology characterized X-ray diffraction (XRD) field effect scanning electron microscopy (FE-SEM). XRD pattern exhibits polycrystalline with preferential orientation along (200) direction, parameters suc...

Journal: :Crystals 2022

In this work, structural, microstructural, thermal, and magnetic properties of a Fe-25at%Al alloy produced by high-energy mechanical milling were investigated X-ray diffraction (XRD), scanning electron microscopy (SEM), differential calorimetry (DSC), vibrating sample magnetometry (VSM) techniques. At the early stage process, three phases, namely, Fe, Al, Fe(Al), coexist in milled powder. After...

ژورنال: :پژوهش فیزیک ایران 0
فاطمه صائب f saeb magnet & superconducting res. lab., dept. of physics, alzahra university, p.c.1993891176, tehran, iranآزمایشگاه پژوهشی مغناطیس و ابررسانایی، دانشکده علوم پایه، دانشگاه الزهرا، تهران، ایران سمیه فلاحتی s falahati magnet & superconducting res. lab., dept. of physics, alzahra university, p.c.1993891176, tehran, iranآزمایشگاه پژوهشی مغناطیس و ابررسانایی، دانشکده علوم پایه، دانشگاه الزهرا، تهران، ایران وحید دادمهر v daadmehr magnet & superconducting res. lab., dept. of physics, alzahra university, p.c.1993891176, tehran, iranآزمایشگاه پژوهشی مغناطیس و ابررسانایی، دانشکده علوم پایه، دانشگاه الزهرا، تهران، ایران

نمونه های بس­بلوری m=ni,fe) yba2cu3-xmxo7-δ  )با مقادیر آلایش 0≤x≤0/045 به روش سل-ژل ساخته شد. آنالیز فازی و ریز ساختار نمونه ها با طیف اشعه x و sem مورد بررسی قرار گرفت . مقاومت الکتریکی با استفاده از تکنیک چهارمیله­ای استاندارد برای 300-77k  اندازه گیری شده اند. نتایج بررسی طیف xrd ، با استفاده از نرم افزار maud جانشینی ni در محل (2) cu و fe در محل (1) cu را نشان می دهد. تغییرات دمای گذار برا...

ژورنال: :فرآیندهای نوین در مهندسی مواد 0
حامد ثابت دانشگاه آزاد اسلامی واحد کرج -گروه مهندسی مواد و متالورژی

در تحقیق حاضر آلیاژ های روکش سخت پایه fe-cr-c با نسبت (وزنی) متفاوت به روش smaw به صورت تک لایه و دو لایه بر روی فولاد ساده کربنی st 32 جوشکاری گردیدند. سپس نمونه هایی تهیه و آزمون های آنالیز شیمیایی (oes) ، متالوگرافی نوری،xrd، sem، و خستگی حرارتی بر روی آنها انجام شد. نتایج آزمون پراش پرتو (xrd) x نشان داد که ریز ساختار لایه روکش سخت نمونه روکش سخت شده با الکترود( پر کربن –پر کروم) ab شامل کا...

PVC/NiFe2O4/Fe2O3 compositewas successfully synthesized and characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD), and scanning electron microscopy (SEM). Also, the catalytic activity of PVC/NiFe2O4/Fe2O3 has been considered in the synthesis of two arylidene barbitu...

2011
Xuan Xu Fangying Ji Zihong Fan Li He

In this study, Fe(3)O(4)/SiO(2)/TiO(2) photocatalyst was prepared via a sol-gel method, and Fe(3)O(4) particles were used as the core of the colloid. Diffraction peaks of Fe(3)O(4) crystals are not found by XRD characterization, indicating that Fe(3)O(4) particles are well encapsulated by SiO(2). FTIR characterization shows that diffraction peaks of Ti-O-Si chemical bonds become obvious when th...

An anionic Fe(II) complex, (BMIM)4[Fe(CN)6] (where BMIM is 1-butyl-3-methylimidazolium), was synthesized in ionic liquid [BMIM][PF6] under reflux condition. The complex was characterized by elemental analysis and spectroscopic methods. The magnetite (Fe3O4) nanoparticles were prepared by the hydrothermal and solvothermal (in ionic liquid [BMIM][PF6]) methods from (BMIM)4[Fe(CN)6] as a precursor...

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