Synthesis of high-purity YbBa2Cu3O7^|^minus;d and LuBa2Cu3O7^|^minus;d superconductors by polymerizable complex method

Synthesis of high-purity YbBa2Cu3O7−d and LuBa2Cu3O7−d superconductors by polymerizable complex method

Polycrystalline samples of YbBa2Cu3O71d and LuBa2Cu3O71d were prepared by polymerizable complex method. The combined results of both X-ray diffraction and Raman scattering analyses indicated that YbBa2Cu3O71d sample was of single phase when the samples were sintered in a low oxygen partial pressure (1%) at relatively low temperature (845°C). On the other hand, LuBa2Cu3O71d sample was only sligh...

High-purity Cu nanocrystal synthesis by a dynamic decomposition method

Cu nanocrystals are applied extensively in several fields, particularly in the microelectron, sensor, and catalysis. The catalytic behavior of Cu nanocrystals depends mainly on the structure and particle size. In this work, formation of high-purity Cu nanocrystals is studied using a common chemical vapor deposition precursor of cupric tartrate. This process is investigated through a combined ex...

robust control of a high-purity disttilation column using synthesis

Characterization of Rod-like High-purity Fluorapatite Nanopowders Obtained by Sol-gel Method

high purity fluorapatite (FA) with rod-like and spherical-like morphology was synthesized via sol-gel method. Chemical characterization of FA powders was done by XRD and FTIR analyses. Crystallite samples were calculated using Scherer method. Morphology of FA powders was investigated with TEM and SEM images. The results revealed that increasing the time of hydrolysis of phosphate sols significa...

on the practicality and effectiveness of a personalized eclectic method incorporated into iranian high school efl syllabus

همگام با سرعت در حال رشد خلاقیت و نوآوری های آموزش زبان به ویژه ظهور روش ارتباطی آموزش زبان? بسیاری از مدارس زبان با بازاندیشی آموزش و پرورش خود? برای گنجاندن فعالیت های ارتباطی، وزمینه ی شخصی سازی شده به شیوه های سنتی خود به روز رسانی شده اند. با این حال، مدارس ایرانی در این زمینه آهسته پیش رفته اند. از این رو، هدف عمده ی پژوهش حاضر برداشتن یک گام در پر کردن شکاف بین نظریه های آموزشی نو ظهور و...