نتایج جستجو برای: x ray diffraction analysis

تعداد نتایج: 3375249  

Journal: :international journal of environmental research 2015
s. gitipour m.a. hosseinpour n. heidarzadeh p. yousefi a. fathollahi

in this research, hydraulic and sorption behavior of geosynthetic clay liners (gcls) withordinary and modified clay exposed to crude oil were studied. both modified and ordinary bentonites wereinvestigated to evaluate crude oil adsorption efficiency on the liners. because soil permeability exposed tocrude oil is a major parameter in measuring the contaminants migration in soils, the permeabilit...

Journal: :iranian endodontic journal 0
hengameh akhavan pooneh mohebbi amir firouzi mehdi noroozi

introduction: the aim of this study was to compare the chemical compounds of white proroot mineral trioxide aggregate (wmta) hydrated at different ph environments. methods and materials: mixed samples of wmta were kept in acidic (ph=5.4), neutral (ph=7.4) and alkaline (ph=9.4) environments for 48 h. then, x-ray diffraction (xrd) analysis was performed for both hydrated and powder forms of wmta....

Journal: :international journal of nano dimension 0
a. bagheri gh. department of chemistry, center tehran branch, islamic azad university, tehran, iran. z. mirjani kahaki department of chemistry, center tehran branch, islamic azad university, tehran, iran.

oxide nanoparticles can exhibit unique physical and chemical properties due to their limited size and a high density of corner or edge surface sites. in this study, mgo nanoparticle was synthesized using mg(ch3coo)2 and hexamethylenetetramine as starting materials. the structure and optical properties of these particles are investigated by using x-ray diffraction (xrd), scanning electron micros...

Journal: :international journal of nano dimension 0
a. jegan. department of chemistry, sona college of technology, salem, india. a. ramasubbu department of chemistry, government arts college (autonomous), coimbatore, india. s. saravanan department of chemistry, sona college of technology, salem, india. s. vasanthkumar department of chemistry and nanotechnology, karunya university, coimbatore, india.

the magnetite (fe3o4) – agar nanocomposite was prepared by co-precipitation of fe (iii) and fe (ii) ions for the first time. the obtained samples were characterized by x-ray diffraction, fourier-transform infrared spectroscopy, scanning electron microscopy and transmission electron microscopy. ft-ir results confirm the formation of fe3o4 nanoparticles in agar matrix. the xrd results revealed th...

An X-ray diffraction line will broaden considerably when steels change into martensitic structure on quenching. The results presented in this paper show that X-ray diffraction technique can be employed for a rapid and nondestructive measurement of hardness of hardened steel. Measurement on various quenched and tempered steels showed that the breadth of its diffraction peak increased with increa...

F. Hosseini Nasab, M. Movaghar Garabagh S. Hossein Nedjad

X-ray diffraction peak profile analysis was used to identify changes in the lattice distortions during isothermal aging of Fe-10Ni-7Mn (wt. %) maraging steel. Integral peak breadths were analyzed using classical Williamson-Hall equation taking the elastic anisotropy into account. It was found that substantial lattice distortions rise during precipitation hardening which depend strongly on the s...

Journal: :international journal of iron & steel society of iran 2010
f. hosseini nasab s. hossein nedjad m. r. movaghar garabagh

x-ray diffraction peak profile analysis was used to identify changes in the lattice distortions during isothermal aging of fe-10ni-7mn (wt. %) maraging steel. integral peak breadths were analyzed using classical williamson-hall equation taking the elastic anisotropy into account. it was found that substantial lattice distortions rise during precipitation hardening which depend strongly on the s...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز 1390

در این تحقیق ابتدا پوشش های آلیاژی ni-zn و ni-zn-p پایه نیکلی با استفاده از روش آبکاری الکتریکی و از حمام اسیدی بر روی ورق فولادی، پوشش داده شد. تر کیب شیمیایی و مورفولوژی سطح ای پوشش ها مورد مطالعه قرار گرفت. میزان میکروکرنش پوشش ها نیز به کمک گراف x-ray diffraction تعیین شد.مطالعات میکروسکوپ الکترونی روبشی و نتایج آنالیز x-ray diffraction نشان داد میزان ترک و میکرو کرنش در پوشش با افزایش درصد...

Journal: :پژوهش فیزیک ایران 0
اعظم غلام پورآژیر a gholampour azhir institute for research in fundamental sciences, iranian light source facility, tehranتهران، بزرگراه ارتش، پژوهشگاه دانش های بنیادی، طرح چشمه نور ایران سمیه امیری s amiri institute for research in fundamental sciences, iranian light source facility, tehranتهران، بزرگراه ارتش، پژوهشگاه دانش های بنیادی، طرح چشمه نور ایران حسین خسروآبادی h khosroabadi institute for research in fundamental sciences, iranian light source facility, tehranتهران، بزرگراه ارتش، پژوهشگاه دانش های بنیادی، طرح چشمه نور ایران جواد رحیقی j rahighi institute for research in fundamental sciences, iranian light source facility, tehranتهران، بزرگراه ارتش، پژوهشگاه دانش های بنیادی، طرح چشمه نور ایران محمد لامعی رشتی m lamehi rachti institute for research in fundamental sciences, iranian light source facility, tehranتهران، بزرگراه ارتش، پژوهشگاه دانش های بنیادی، طرح چشمه نور ایران

this paper describes day-one beamlines of the iranian light source facility and design concept of powder diffraction and spectromicroscopy beamlines as the most priorities of each synchrotron that cover the research requirements in the fields of physics, chemistry, nano-science, etc. for powder diffraction beamline energy range is 6-30 kev, resolution: 10-4, flux: 1012(ph/s/0.1%b.w.) and spot s...

Journal: :journal of nanostructures 2012
m. salavati-niasari m. ranjbar d. ghanbari

zns  nanoparticles  were  synthesized  via  a  simple  surfactant  free microwave  route.  in  this  synthesis, thioacetamide  was  used  as sulfur  source.  the effects  of different  parameters  such  as  type of zinc precursor,  time  and  power  of  irradiation  on  the  morphology and  particle  size  of  the  products  have been  investigated.  the nanostructures  were  characterized  by ...

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