بررسی خواص ابررسانایی و مغناطیسی ابررسانای سرامیکی Bi2Sr2Ca2Cu3O10+θ با افزودن نانوذرات کاربید سیلیسیم

نویسندگان

1 گروه پژوهشی مواد غیرفلزی، پژوهشگاه نیرو، تهران، ایران

2 گروه مهندسی و علم مواد، دانشکده فنی و مهندسی، دانشگاه بین‌المللی امام خمینی (ره)، قزوین، ایران

چکیده

در این تحقیق، اثر افزودن نانوذرات کاربید سیلیسیم بر فاز ابررسانای دمابالای (2223-Bi) Bi1.6Pb0.4Sr2Ca2Cu3O10+θ به‌منظور بهبود خواص ساختاری، ابررسانایی، مغناطیسی و میخکوبی شار مغناطیسی بررسی شده ‌است. ابررسانای سرامیکی 2223-Bi به روش سل- ژل سنتز شد و در ادامه، فرآیند عامل‌‌دار کردن سطح ذرات کاربید سیلیسیم به کمک ترکیب آلی ازو بیس ایزو بوتیرو نیتریل (AIBN) انجام شد. اندازه‌گیری‌های پراش اشعه X، تصویربرداری میکروسکوپی گسیل میدانی، پذیررفتاری مغناطیسی و منحنی هیسترزیس به‌منظور بررسی خواص ترکیبات سنتز شده صورت گرفت. با هدف تحلیل ساختاری، الگوی پراش اشعه ایکس نمونه‌ها با استفاده از نرم‌افزار MAUD، برازش شد. بر این اساس، با افزایش مقادیر نانوذرات کاربید سیلیسیم، فاز مطلوب 2223-Bi کاهش یافته اما ثابت‌های شبکه تغییری نکرده است. این مسئله نشان می‌دهد که نانوذرات، به ساختار شبکه 2223-Bi وارد نشده‌اند. بر طبق اندازه‌گیری‌های مغناطیسی، دمای گذار ابررسانایی با افزایش درصد نانوذرات کاهش می‌یابد. همچنین، بیشترین مقدار مغناطش‌‌پذیری، پهنای حلقه هیسترزیس، چگالی جریان بحرانی و نیروی میخکوبی شار مغناطیسی به نمونه با 0/4 درصد وزنی کاربید سیلیسیم، تعلق دارد. 

کلیدواژه‌ها

عنوان مقاله [English]

INVESTIGATION OF SUPERCONDUCTIVITY AND MAGNETIC PROPERTIES OF BI2SR2CA2CU3O10+Θ CERAMIC SUPERCONDUCTOR WITH ADDITION OF SILICON CARBIDE NANOPARTICLES

نویسندگان [English]

  • H. Fallah-Arani 1
  • N. Riahi-Noori 1
  • S. Baghshahi 2
  • A. Sedghi 2
  • F. Shahbaz Tehrani 1
1 Non-Metallic Materials Research Group, Niroo Research Institute (NRI), Tehran, Iran
2 Department of Materials Engineering, Faculty of Engineering, Imam Khomeini International University, Qazvin, Iran
چکیده [English]

In this research, the effect of addition of silicon carbide (SiC) nanoparticles on the improvement of the structural, superconductivity, magnetic, and flux pinning properties of high-temperature superconductor Bi1.6Pb0.4Sr2Ca2Cu3O10+θ (Bi-2223) was investigated. The Bi-2223 ceramic superconductor was prepared using the sol-gel method, and silicon carbide nanoparticles were modified by Azobisisobutyronitrile (AIBN). The X-ray diffractometry, feild emission scanning electron microscopy, magnetic susceptibility, and hystersis loop measurements were performed to characterize the synthesized compounds. Based on the magnetic measurements, the superconductivity transition temperature dropped with an increase in the content of nanoparticles. Also, the maximum magnetization, hysteresis loop width, critical current density, and magnetic flux pinning force belonged to the sample with 0.4 wt.% SiC nanoparticles.

کلیدواژه‌ها [English]

  • Bi-2223 superconductor
  • Silicon carbide
  • magnetic susceptibility
  • flux pinning

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مواد پیشرفته در مهندسی
دوره 40، شماره 4
اسفند 1400
صفحه 1-14

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