التفاصيل البيبلوغرافية
| العنوان: |
Mechanically assisted synthesis of multiferroic BiFeO3: Effect of synthesis parameters. |
| المؤلفون: |
Pedro-García, F.1, Sánchez-De Jesús, F.1, Cortés-Escobedo, C.A.2, Barba-Pingarrón, A.3, Bolarín-Miró, A.M.1 anabolarin@msn.com |
| المصدر: |
Journal of Alloys & Compounds. Jul2017, Vol. 711, p77-84. 8p. |
| مصطلحات موضوعية: |
*BISMUTH compounds, *CHEMICAL synthesis, *MULTIFERROIC materials, *CRYSTAL structure, *ELECTRONIC structure, *MAGNETIC properties of metals |
| مستخلص: |
We report the influence of synthesis parameters on the crystal structure and the electronic and magnetic behavior of multiferroic bismuth ferrites, BiFeO 3 , synthesized by high-energy ball milling followed by annealing at low temperatures. Mixtures of Fe 2 O 3 and Bi 2 O 3 , in a stoichiometric ratio, were mixed and milled for different durations from 0 to 13 h in an ambient air atmosphere and annealed for 2 h at different temperatures, from 350 to 750 °C in order to obtain BiFeO 3 . X-ray diffraction and Rietveld refinement were used to elucidate the phase transformation as a function of the synthesis parameters. The results showed that BiFeO 3 particles with mostly a single phase (∼98 wt%) were fabricated by the assisted high-energy ball milling process, after 5 h of milling followed by heat treatment at 650 °C; higher milling durations and annealing temperatures promote perovskite decomposition. The obtained powder shows a weak ferromagnetic behavior, which changes to an antiferromagnetic order when the powder is pressed at 900 MPa and sintered at 800 °C for 2h. The magnetic and dielectric results confirm the multiferroic behavior of the obtained material. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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