| Synthesis of nano-structured bismuth ferrite by mechano-thermal route |
| Paper ID : 2043-UFGNSM13-FULL (R1) |
| Authors: |
|
Mostafa Ahmadzadeh1, abolghasem ataie *2, Ebrahim Mostafavi3 1Unit 4, No 16, Golha Alley, Tehran St , Daneshgah-e-Sharif Town, Tehran-Karaj Highway, Tehran, Iran. 2School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran 3Unit 1, First floor, No.19, Sarv-e Azad Ave, Azadshahr town, Km 14
tehran-karaj highway, Tehran, Iran. |
| Abstract: |
| In this study, multiferroic BiFeO3 (BFO) powders were synthesized via mechanical activation of Bi2O3 and Fe2O3 with the molar ratio of 1:1, using a planetary high energy ball mill and subsequent heat treatment. All samples were milled for 20 h and heat treated at various temperatures. XRD, FESEM, LPSA, and VSM techniques were used to evaluate the powder particle characteristics. FESEM images of 20 h milled sample indicated plate-like particles with a mean thickness of 45 nm and its LPSA results showed the mean agglomerate size of about 2.0 µm. XRD results of calcined samples showed that the BFO phase began to form at 650 °C and fully formed at 750 °C. In comparison to the conventionally processed samples, BFO phase formation temperature decreases by ∼100 °C in the samples produced by mechanical activation assisted process. VSM measurements of the sample heat treated at 750 °C revealed a saturation magnetization (Ms) of 0.054 emu/g and coercivity (Hc) of 412 Oe. |
| Keywords: |
| Multiferroic; BiFeO3; Nano-structure; Mechanical activation |
| Status : Paper Accepted (Poster Presentation) |
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