بررسی ویژگی‌های ساختاری و مغناطیسی نانوذرات فریت نیکل تهیه شده به‌روش هیدروترمال

نویسندگان

1 1 -گروه مواد و متالورژی، دانشکده فنی مهندسی، دانشگاه آزاد اسلامی واحد زنجان

2 2 -پژوهشکده سرامیک، پژوهشگاه مواد و انرژی

چکیده

در این پژوهش، نانوذره فریت نیکل با ابعادی بین 40 تا 100 نانو‌متر به‌روش هیدروترمال و با استفاده از پلی‌اتیلن‌گلیکول به‌عنوان سورفاکتانت در دمای 180 درجه سانتی‌گراد و مدت‌ زمان 12 ساعت تولید، و اثر دمای واکنش، زمان و سورفاکتانت مورد بررسی قرار گرفت. براساس نتایج آنالیز اشعه ایکس، تبدیل اکسید نیکل و هماتیت به فریت نیکل راهی برای تولید NiFe2O4 می‌باشد. هم‌چنین، تأثیر دما و زمان واکنش و سورفاکتانت بر ساختار ذرات بررسی شد. نتایج نشان داد که ذرات تشکیل شده در دمای 140 درجه سانتی‌گراد به‌صورت کلوخه بوده، شکل مشخص ندارند ولی در دمای 180 درجه سانتی‌گراد شکل کروی همگن پیدا می‌کنند. هم‌چنین مغناطش اشباع با افزایش زمان فرایند هیدروترمال افزایش می‌یابد.

کلیدواژه‌ها


عنوان مقاله [English]

Analysis of Structural and Magnetic Characteristics of Nickel Ferrite Nanoparticles Prepared by Hydrothermal Method

نویسندگان [English]

  • R. Nayerhoda 1
  • F. Asjadi 2
  • P. Seifi 1
  • M. Salimi 1
چکیده [English]

In the present investigation, spherical nanoparticles of nickel ferrite with uniform structure were successfully produced by hydrothermal method in the presence of polyethylene glycol (PEG) as a polymeric surfactant at 180°C for 12 hour aging time and the effects of the synthesis time, temperature and surfactant were investigated. According to the X-ray analysis, conversion of nickel oxide and hematite to nickel ferrite was a way to produce NiFe2O4. At 140‌°C, agglomerated particles without specific shape were formed, but at 180°C particles were homogenous with spherical shape. Saturation magnetization increased by increasing the hydrothermal process aging time.

کلیدواژه‌ها [English]

  • magnetic nanoparticles
  • Nickel ferrite
  • hydrothermal
  • PEG
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