بررسی اثر جانشینی یون‌های Co-Cr-Sn بر ریزساختار و خواص مغناطیسی هگزافریت باریم نوع M

نویسندگان

1 1- گروه مهندسی مواد ، دانشکده فنی مهندسی، دانشگاه جامع امام حسین (ع)، تهران

2 2 -دانشگاه آزاد اسلامی، واحد علوم و تحقیقات، باشگاه پژوهشگران جوان و نخبگان، تهران، ایران

چکیده

در این پژوهش بررسی ریزساختاری و خواص مغناطیسی هگزافریت باریم دوپ شده با یون‌های کبالت، کروم و قلع با فرمول BaCoxCrxSnxFe12-3xO19 (5/0،3/0x=) به روش حالت جامد صورت گرفت. بررسی‌های فازی و ساختاری به‌ترتیب با تحلیل پراش اشعه ایکس (XRD) و طیف‌سنجی مادون قرمز (FT-IR) تأیید کننده تشکیل ترکیب تک فاز هگزافریت باریم بدون حضور فاز ثانویه غیرمغناطیسی پس از 5 ساعت عملیات حرارتی در دمای °C 1000 بود. هم‌چنین طبق تصاویر میکروسکوپ الکترونی روبشی (SEM) مورفولوژی ذرات به‌صورت کاملاً هگزاگونال با میانگین اندازه ذرات 250-200 نانومتر بود. بر اساس متغیرهای مغناطیسی اندازه‌گیری شده توسط مغناطیس‌سنج نمونه مرتعش (VSM) هر دو نمونه دارای خاصیت مغناطیسی نرم بودند و بیشترین میزان مغناطش اشباع در نمونه با ترکیب BaCo0.3Cr0.3Sn0.3Fe11.1O19 حاصل شد. مقادیر مغناطش اشباع (Ms) و نیروی وادارندگی (Hc) برای این ترکیب به ترتیب برابر emu/g 21/42 و Oe 656 اندازه‌گیری شد.

کلیدواژه‌ها


عنوان مقاله [English]

Investigating the Effect of Co-Cr-Sn Ions Substitution on Microstructure and Magnetic Properties of M-type Barium Hexaferrites

نویسندگان [English]

  • S. S. Seyyed Afghahi 1
  • M. Jafarian 2
  • M. Salehi 2
چکیده [English]

In this research, investigation of the microstructure and magnetic properties of doped barium hexaferrite with cobalt, chromium and tin with BaCoxCrxSnxFe12-3xO19 (x=0.3,0.5) formula, was performed using solid state method. Phase and structural investigation by X-ray Diffraction (XRD) and Fourier Transform Infrared (FTIR) Spectroscopy respectively, confirmed the formation of barium hexaferrites single phase without the presence of non-magnetic secondary phase after heat treatment for 5 h at temperature of 1000 °C. Also, according to scanning electron microscopy (SEM) images, morphology of particles was perfectly hexagonal with average particle size 200-250 nm. Based on magnetic parameters measured by Vibrating Sample Magnetometer (VSM), both samples were soft magnetic and the highest saturation magnetization was obtained for the sample with composition of BaCo0.3Cr0.3Sn0.3Fe11.1O19. The values of saturation magnetization (Ms) and the coercivity (Hc) were 42.21 emu/g and 656 Oe respectively for this compound.

کلیدواژه‌ها [English]

  • Barium hexaferrites
  • Mechanical activation
  • microstructure
  • magnetic properties
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