En
  • دکتری (1392)

    خواص مغناطیسی و الکتریکی اکسید فلزات

    دانشگاه نیوارلئان، نیوارلئان، ایالات متحده آمریکا

  • کارشناسی‌ارشد (1387)

    سرامیک های مغناطیسی

    دانشگاه تهران، تهران، ایران

  • کارشناسی (1384)

    دانشگاه سمنان، سمنان، ایران

  • الکتروسرامیک (جهت اطلاعات بیشتر به آدرس www.eclab.modares.ac.ir مراجعه نمایید)
  • کاربرد اکسیدها در ذخیره، تبدیل و صرفه جویی انرژی
  • الکتروسرامیک

امین یوردخانی از دانشگاه سمنان در رشته مهندسی مواد فارغ التحصیل و در سال 1384 وارد دانشگاه تهران برای گذراندن دوره کارشناسی ارشد شدند. دکتر یوردخانی در سال 1387 برای دوره دکتری رهسپار ایالات متحده آمریکا شد و در گرایش علم مواد دانشکده شیمی دانشگاه نیوارلان و مرکز تحقیقاتی مواد پیشرفته به تحصیل پرداختند. مطالعات ایشان بر خواص الکتریکی و مغناطسیی اکسیدها متمرکز بود. بعد از اتمام دوره دکتری، در سال 1391 دوره پسا دکتری (فلوشیپ ماری کوری) را در مرکز ملی تحقیقات مواد الکترونیکی و مغناطیسی ایتالیا در شهر پارما به مدت یک سال با تمرکز بر اندازه گیری خواص پیزوالکتریکی نانو سیم های اکسید روی با میکروسکوپ نیروی اتمی انجام دادند. ایشان از سال 1394 عضو هیئت علمی دانشگاه تربیت مدرس هستند. زمینه تحقیقاتی دکتر یوردخانی سرامیک های الکتریکی و مغناطیسی است. دکتر یوردخانی در دوره کارشناسی ارشد دروس تئوری و تکنولوژی ساخت ادوات نیمه هادی، سرامیک های الکتریکی و مغناطیسی، آنالیز مواد II و سرامیک فیزیکی را تدریس می کنند. در دوره دکتری درس الکتروسرامیک های پیشرفته توسط ایشان ارائه می شود.

ارتباط

رزومه

How does water of crystallization influence the optical properties, band structure and photocatalytic activity of tungsten oxide?

M Karimkhah, A Yourdkhani, E Moradpur-Tari, R Poursalehi, ...
Journal Papers , , {Pages }

Abstract

Improvements in the thermoelectric efficiency of SrTiO3 through donor doping

H Bakhshi, R Sarraf-Mamoory, A Yourdkhani, S Song, YC Tseng, ...
Journal Papers , , {Pages }

Abstract

Magnetic and electrical properties of Mg1-xCoxFe2O4 (x= 0-0.15) ceramics prepared by the solid-state method

M Nili-Ahmadababdi, R Sarraf-Mamoory, A Yourdkhani, A Diaconu, ...
Journal Papers , , {Pages }

Abstract

Fast-switching electrochromic response of WO3· 2H2O of plate-like particles synthesized by liquid phase deposition

M Mohammad-Hosseinpour, A Yourdkhani, R Poursalehi
Journal Papers , , {Pages }

Abstract

Photoelectrochemical properties of butane flame-treated niobium-doped hematite thin films grown by the liquid-phase deposition method

R Montahaei, SAS Ebrahimi, A Yourdkhani, R Poursalehi
Journal Papers , , {Pages }

Abstract

Improving piezoelectric properties of PVDF fibers by compositing with BaTiO3-Ag particles prepared by sol-gel method and photochemical reaction

S Dashtizad, P Alizadeh, A Yourdkhani
Journal Papers , , {Pages }

Abstract

The effects of sintering temperature on structural, electrical, and magnetic properties of MgFe1. 92Bi0. 08O4

N Varastegani, A Yourdkhani, SA Seyed Ebrahimi, A Rotaru
Journal Papers , , {Pages }

Abstract

Highly dense Sr 0.95 Sm 0.0125 Dy 0.0125□ 0.025 Ti 0.90 Nb 0.10 O 3?δ/ZrO 2 composite preparation directly through spark plasma sintering and its thermoelectric properties

Hamed Bakhshi, Rasoul Sarraf-Mamoory, Amin Yourdkhani, Ahmed Ali AbdelNabi, Yurij Mozharivskyj
Journal PapersDalton Transactions , Volume 49 , Issue 1, 2020 January , {Pages 17-22 }

Abstract

The Sr0.95Sm0.0125Dy0.0125□0.025Ti0.90Nb0.10O3?δ/ZrO2 composite was directly prepared through spark plasma sintering. This approach limited the grain growth and facilitated the achievement of a narrow grain size distribution due to fast sintering and ZrO2 effects. Thermal conductivity declined to 1.68 W m−1 K−1, which is the lowest among the reported values for micro-polycrystalline SrTiO3-based structures.

Varistor and electrical properties of MgO center dot (Fe2O3)(1-x)(Bi2O3)(x) ceramics

Niousha Varastegani, Amin Yourdkhani, Seyyed Ali Seyyed Ebrahimi, Aurelian Rotaru
Journal PapersJOURNAL OF THE EUROPEAN CERAMIC SOCIETY , Volume 40 , Issue 4, 2020 April 1, {Pages 1325-1329 }

Abstract

In this study, MgO center dot(Fe2O3)(1-x)(Bi2O3)(x) (x = 0.01, 0.02, 0.04, 0.08) samples were prepared by the conventional ceramic process. Microstructure studies revealed that the samples contain MgFe2O4 grains surrounded by insulating Bi2O3-rich phases. DC electrical resistivity of the samples was increased by Bi2O3 content up to 1.1 M Omega.cm for the sample with x = 0.08. Current density-electric field investigations suggested that the samples with x = 0.01, 0.02 and 0.04 exhibited varistor properties. The sample with x = 0.01 showed excellent varistor properties with a non-linear coefficient of 45 and a threshold electric field value of 160 V/cm. Variation of D.C electrical conductivity versus temperature indicated that the activation

Candle flame-treatment as an effective strategy to enhance the photoelectrochemical properties of Ti-doped hematite thin films

Marjan Saeidi, Amin Yourdkhani, Seyed Ali Seyed Ebrahimi, Reza Poursalehi
Journal PapersJournal of Materials Chemistry C , Volume 8 , Issue 34, 2020 January , {Pages 11950-11961 }

Abstract

Flame-treatment as a simple, low cost, and highly reliable strategy was applied to effectively enhance the photoelectrochemical (PEC) properties of liquid phase deposited Ti-doped hematite thin films. The samples were heat-treated in three steps: 2 hours at 600 ?C, one minute at 800 ?C, and then 90 seconds in the flame of a paraffin wax candle. The microstructure studies revealed that the granular – morphology of the films depends on Ti doping levels and varies from acicular-like for the undoped and 1% Ti doped to spherical-like for 2–4% Ti, and then to warm-like morphology for 5% Ti-doped samples. The optical band-gap energy values of the samples decreased from 1.94 eV for the undoped to 1.53 eV for the 4% Ti-doped sample. The PEC inve

Characterization and estimation of dielectric constant of electrospun BaTiO3 nanofibers at different calcination temperatures using theoretical models

Mehdi Hedayati, Ehsan Taheri-Nassaj, Amin Yourdkhani, Mario Borlaf, Shahed Rasekh, Parisa Amirkhizi, Tutu Sebastian, Seyedhosein Payandeh, Frank J?rg Clemens
Journal PapersJournal of the European Ceramic Society , 2020 October 2, {Pages }

Abstract

The main aim of this work was to estimate the dielectric constant of electrospun BaTiO3 nanofibers (BT NFs) using theoretical models. The effect of calcination temperatures on morphology and crystal structure of BT NFs was also investigated by using SEM, TEM, XRD and Raman spectroscopy. The dielectric constant of BT NFs was calculated by applying modified Maxwell Garnett and Yamada models on polymer nanocomposite films comprising stearic acid modified BT NFs in Polyvinylidene difluoride (PVDF) matrix. The results showed that although it was detected low tetragonality (1.0041) at lowest calcination temperature (850 ?C), the better crystallization of BT and high tetragonality could be achieved at a calcination temperature of 1000 ?C and above

Highly dense Sr 0.95 Sm 0.0125 Dy 0.0125□ 0.025 Ti 0.90 Nb 0.10 O 3±δ/ZrO 2 composite preparation directly through spark plasma sintering and its thermoelectric properties

H Bakhshi, R Sarraf-Mamoory, A Yourdkhani, AA AbdelNabi, ...
Journal Papers , , {Pages }

Abstract

DC Arc discharge synthesized zirconia nanoparticles: shed light on arc current effects on size, crystal structure, optical properties and formation mechanism

Reza Peymani, Reza Poursalehi, Amin Yourdkhani
Journal PapersMaterials Research Express , Volume 6 , Issue 7, 2019 April 3, {Pages 075002 }

Abstract

In this study zirconia nanoparticles (NPs) were successfully synthesized via the direct current (DC) arc discharge method in water. Formation mechanism of NPs and the effect of arc current on morphological, structural and optical properties of NPs have been studied. The NPs were synthesized at four different currents in the 40–160 A range. SEM observations showed NPs are spherical in shape and their average size decrease from 40 to 22 nm by increasing the current from 40 to 160 A. XRD analysis revealed phase composition of NPs is a mixture of tetragonal and monoclinic for all the samples, and the phase fraction of NPs are arc current dependent in such a way that an increase in the current leads to an increase in the weight percent of the

Iron-doping as an effective strategy to enhance supercapacitive properties of nickel molybdate

K Yousefipour, R Sarraf-Mamoory, Amin Yourdkhani
Journal PapersElectrochimica Acta , Volume 296 , 2019 February 10, {Pages 608-616 }

Abstract

Iron-doped hydrated nickel molybdate (Fe x Ni 1-x MoO 4. 0.75 H 2 O, x= 0–0.10) nanorods were successfully synthesized via a simple one-pot hydrothermal route. Our investigations showed that hydrated nickel molybdate (HNMO) possesses identical crystal structure to CoMoO4. 0.75 H2O with a triclinic crystal structure and P 1? space group. Electron microscopy studies showed that the HNMO powders consist of single crystalline nanorods with [1 2? 2] growth direction. The effectiveness of iron-doping into the crystalline lattice of the HNMO was demonstrated by powder x-ray diffraction (PXRD), UV–visible spectroscopy and electrochemical impedance spectroscopy (EIS). Upon iron-doping, the band gap energy values reduced from 4.03 eV for the un-d

Sol-gel synthesis, spark plasma sintering, structural characterization, and thermal conductivity measurement of heavily Nb-doped SrTiO3/TiO2 nanocomposites

Hamed Bakhshi, Rasoul Sarraf-Mamoory, Amin Yourdkhani, Ahmed Ali AbdelNabi, Yurij Mozharivskyj
Journal PapersCeramics International , 2019 October 4, {Pages }

Abstract

Heavily Nb-doped strontium titanate (SrTi1-xNbxO3) nanoparticles and SrTi1-xNbxO3/TiO2 nanocomposite powders were synthesized by a sol-gel method. Structural characterization of the obtained powders was performed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and UV–visible spectroscopy. The powders were densified by spark plasma sintering (SPS) method up to 98% of the relative density. Upon composite production, the thermal conductivity of the un-doped samples was effectively decreased for SrTiO3/TiO2 nanocpmposite from 12 to 8 W/m.K. On the other hand, thermal conductivity of the Nb-doped SrTi0.8Nb0.2O3/TiO2 composite was decreased by about 50% down to 3.4 W/m.K in comparison to SrTiO3/TiO2 due to the ph

Varistor and electrical properties of MgO.(Fe2O3) 1− x (Bi2O3) x ceramics

Niousha Varastegani, Amin Yourdkhani, Seyyed Ali Seyyed Ebrahimi, Aurelian Rotaru
Journal PapersJournal of the European Ceramic Society , 2019 November 29, {Pages }

Abstract

In this study, MgO.(Fe2O3)1−x(Bi2O3)x (x = 0.01, 0.02, 0.04, 0.08) samples were prepared by the conventional ceramic process. Microstructure studies revealed that the samples contain MgFe2O4 grains surrounded by insulating Bi2O3-rich phases. DC electrical resistivity of the samples was increased by Bi2O3 content up to 1.1 MΩ.cm for the sample with x = 0.08. Current density- electric field investigations suggested that the samples with x = 0.01, 0.02 and 0.04 exhibited varistor properties. The sample with x = 0.01 showed excellent varistor properties with a non-linear coefficient of 45 and a threshold electric field value of 160 V/cm. Variation of D.C electrical conductivity versus temperature indicated that the activa

BaTiO3 nanotubes by co-axial electrospinning: Rheological and microstructural investigations

Mehdi Hedayati, Ehsan Taheri-Nassaj, Amin Yourdkhani, Mario Borlaf, Jian Zhang, Michel Calame, Tutu Sebastian, Seyedhosein Payandeh, Frank J?rg Clemens
Journal PapersJournal of the European Ceramic Society , 2019 November 27, {Pages }

Abstract

BaTiO3 (BT) nanotubes (NTs) were synthesized using a co-axial electrospinning process. BT precursor/PVP-ethanol and heavy mineral oil were used as the shell solution and core liquid, respectively. The rheological studies indicated that NTs could be formed by a stable jet at a range of viscosities of the shell solution. Due to the shear thinning behavior of the shell solutions, their actual viscosity values at the time of jet formation will be lower than the viscosity of the core liquid. The morphology of the obtained NTs was strongly influenced by the viscosity of the shell solution. By increasing the concentration of BT precursor, the morphology of the BT NTs was changed from porous to more dense structure. XRD analysis revealed that the c

Tutorial: Product properties in multiferroic nanocomposites

Dwight Viehland, Jie Fang Li, Yaodong Yang, Tommaso Costanzo, Amin Yourdkhani, Gabriel Caruntu, Peng Zhou, Tianjin Zhang, Tianqian Li, Arunava Gupta, Maksym Popov, Gopalan Srinivasan
Journal PapersJournal of Applied Physics , Volume 124 , Issue 6, 2018 August 14, {Pages 061101 }

Abstract

The coupling between magnetic and electric subsystems in composites of ferromagnetic and ferroelectric phases is a product property that is facilitated by mechanical strain that arises due to magnetostriction and the piezoelectric effect in the constituent phases. Such multiferroic composites are of immense interests for studies on the physics of electromagnetic coupling and for use in a variety of applications. Here, we focus on magneto-electric (ME) coupling in nanocomposites. Particular emphasis is on core-shell particles and coaxial fibers, thin film heterostructures, and planar structures with a variety of mechanical connectivity. A brief review of models that predict strong ME effects in nanostructures is followed by synthesis and cha

Optical and structural properties of colloidal zirconia nanoparticles prepared by arc discharge in liquid

Reza Peymani forooshani, Reza Poursalehi, Amin Yourdkhani
Journal PapersAIP Conference Proceedings , Volume 1920 , Issue 1, 2018 January 10, {Pages 020028 }

Abstract

Zirconia is one of the important ceramic materials with unique properties such as high melting point, high ionic conductivity, high mechanical properties and low thermal conductivity. Therefore, zirconia is one of the useful materials in refractories, thermal barriers, cutting tools, oxygen sensors electrolytes, catalysis, catalyst supports and solid oxide fuel cells. Recently, direct current (DC) arc discharge is extensively employed to synthesis of metal oxide nanostructures in liquid environments. The aim of this work is the synthesis of colloidal zirconia nanoparticles by DC arc discharge method in water as a medium. Arc discharge was ignited between two pure zirconium electrodes in water. Optical and structural properties of prepared c

Liquid phase deposition of iron phosphate thin films

Ehsan Mahboubi, Amin Yourdkhani, Reza Poursalehi
Journal PapersCrystEngComm , Volume 20 , Issue 35, 2018 January , {Pages 5256-5268 }

Abstract

Liquid phase deposition (LPD) has been applied for the synthesis of iron phosphate thin films as an example of an effective methodology for the thin film growth of other polyanionic compounds. The prepared films were highly uniform, free of cracks, pure and successfully applied to cover various substrates such as soda-lime glass and stainless steel. The thickness of these films can be easily tailored in the range of 80 nm to 2.7 μm by the deposition time. The chemical equilibria for the hydrolysis of [PF6]− species and the formation of iron phosphate were studied by 19F-NMR and 31P-NMR spectroscopy to get insight into the formation mechanism of iron phosphate thin films. Hydrolysis of [PF6]− occurs very slowly and a longer induction pe

/pro/academic_staff/ayourd/publication

دروس نیمسال جاری

  • كارشناسي ارشد
    سراميك هاي الكتريكي و مغناطيسي ( واحد)
    دانشکده فنی و مهندسی، گروه سراميك
  • كارشناسي ارشد
    روش هاي پيشرفته شناخت و آناليز مواد (2) ( واحد)
  • كارشناسي ارشد
    نانوشيمي ( واحد)

دروس نیمسال قبل

  • كارشناسي ارشد
    سراميك فيزيكي ( واحد)
    دانشکده فنی و مهندسی، گروه سراميك
  • 1400
    داداشي رادور, سهند
    ويژگي هاي الكتروشيميايي نوري اتصال همگون لايه هاي نازك هماتيت آلايش يافته با Ti و Zn به روش رسوب گذاري از فاز مايع
  • 1399
    نيلي احمدابادي, مريم
    اصلاح آند نوري هماتيت با كاتاليست همكار نيتريد آهن
  • 1399
    عباسعلي, زينب
  • مشاور انجمن علمی-دانشجویی مهندسی مواد- سرامیک از سال 96 تا کنون
  • مدیر گروه مهندسی سرامیک از سال 97 تا کنون
  • فلوشیپ پسادکتری ماری کوری از طرف اتحادیه اروپا در شبکه نانوسیم ها، 2013-2012

مهم

جدید

    اطلاعیه ای درج نشده است