Hadi Arabi
Renewable Energies, Magnetism and Nanotechnology Research Laboratory; Department of Physics, Ferdowsi University of Mashhad
[ 1 ] - Density Functional Studies on Crystal Structure and electronic properties of Potassium Alanate as a candidate for Hydrogen storage
Potassium Alanate is one of the goal candidates for hydrogen storage during past decades. In this report, initially the Density Functional Theory was applied to simulate the electronic and structural characteristic of the experimentally known KAlH4 complex hydride. The relaxation of unit cell parameters and atomic positions was performed until the total residual force reduced less than 0.001ev ...
[ 2 ] - Study the stability of Si, Ge, Fe and Co in the interior surface of metallic carbon nanotube for hydrogen storage
In this article, we have performed calculations for studying the stability of the carbon group elements such as Si and Ge and also the magnetic elements like Fe and Co via first principle investigations. We found that Si and Ge decoupled from the interior surface of carbon nanotubes, this fact was independent in curvature, radius, conductivity and numbers of atoms in the carbon nanotubes. But t...
[ 3 ] - Synthesis, characterization and hydrogen storage properties of Mm(Ni,Co,Mn,Al)5 alloy
The hydrogenation characterizations of the hydrogen storage alloy MmNi4.22Co0.48Mn0.15Al0.15 (Mm= mischmetal), and the effect of hydrogenation/dehydrogenation (H/D) cycling on its structural and morphological properties are investigated. The results indicate that after several H/D cycles the alloy was pulverized into fine particles, but it kept its hexagonal CaCu5-type structure. The pressure-c...
[ 4 ] - "Physical properties and electronic structure of LaNi5 compound before and after hydrogenation: An experimental and theoretical approach"
The present study deals with the experimental and theoretical approaches of LaNi5 hydrogen storage alloy. The structural, morphological and hydrogenation characterization of this sample which is synthesized by the arc melting technique were carried out by X-ray diffraction, scanning electron microscopy and a homemade Sievert's type apparatus, respectively. The results showed that after several ...
[ 5 ] - بررسی اثر دمای تکلیس در ایجاد خاصیت فرومغناطیسی در ذرات بسیار ریز ابررسانای دمای بالای HoBa2Cu3O7-δ
در این تحقیق بهمنظور بررسی تأثیر دمای تکلیس در ایجاد خاصیت فرومغناطیسی در ذرات بسیار ریز (زیرمیکرومتری) ابررسانای دمای بالا HoBa2Cu3O7-δ، نمونههایی با استفاده از روش سیترات ژل در دماهای تکلیس متفاوت تهیه شده است. در این روش از نمکهای نیترات Ho، Ba و Cu با خلوص بالا به عنوان مواد اولیه و از اسید سیتریک به عنوان عامل کمپلکس‌ساز استفاده شده است. تعیین فاز و بررسی خواص ساختاری نمونهها توسط ...
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