مطالعه ابررسانای Bi1.64Pb0.36Sr2Ca2-xCdxCu3O10ساخته شده به روش سل ـ‌ ژل

نوع مقاله : مقاله پژوهشی کامل

نویسندگان

1 عضو هیأت علمی

2 دانشجو

چکیده

چکیده‌
ابررسانای سرامیکی Bi1.64Pb0.36Sr2Ca2-xCdxCu3O10آلایش یافته با Cd به روش سل ـ ژل ساخته شد. برای تهیه نمونه‌ها، مقدار آلایش کادمیوم از 2/0-0=x و زمان‌های پخت 32، 48، 56 و 64 ساعت انتخاب شدند. برای یافتن دمای شروع واکنش مواد اولیه از ژل خشک شده آنالیز TGA گرفته شد. ریخت‌شناسی و ریزساختار نمونه‌ها توسط XRD و SEM مورد بررسی قرار گرفت. نتایج حاصل از XRD نشان داد که‌ بیشترین درصد فاز 2223-Bi ،برای نمونة با مقدار آلایش تا 02/0=x می‌‌باشد. چگالی جریان بحرانی و دمای بحرانی نمونه‌ها با استفاده از روش چهارمیله‌ای اندازه‌گیری شد که نتایج حاصل از آن‌ها نشان می‌دهد که در زمان پخت 48 ساعت، نمونة با مقدار آلایش 02/0=x دارای بیشترین چگالی جریان بحرانی و دمای بحرانی می‌باشد.

کلیدواژه‌ها


عنوان مقاله [English]

Studying synthesized ‎Bi1.64Pb0.36Sr2Ca2-xCdxCu3O10 superconductor properties using the sol-gel method

نویسندگان [English]

  • ٍٍSeyed Ebrahim Mousavi Ghahfarokhi 1
  • Fatemeh Joola 2
  • Mansoor Farbod 1
1
2 Student
چکیده [English]

Abstract
The sol-gel technique has been used in the preparation of Cd doped Bi1.64Pb0.36Sr2Ca2-xCdxCu3O10 ceramic superconductors. In this study, the value of doping Cd has been varied from x = 0-0.2 at different annealing times (32, 48, 56 and 64h) for preparing samples. To find the temperature of annealing, TGA analysis has been done from dried gel. Analysis of XDR and SEM has been done to study the morphology and microstructur of samples. The results of XRD indicated that the maximum values of the Bi-2223 phase percent was obtained for sample doped with x = 0.02 Cd. Also, the study of SEM images shows that this sample has a plate like structure which is caused increase in the critical current density. The critical current density and the critical temperature of samples have been measured by four-probe method. The results show that the sample which was doped with x = 0.02 has maximum value of percentage of Bi – 2223 phase, critical current density and critical temperature

کلیدواژه‌ها [English]

  • Bi-based
  • Doping of Cd
  • Sol-gel
  • Morphology
  • XRD
  • Critical current density
  • Critical temperature
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