Multiferroic materials exhibiting ferromagnetic and ferroelectric properties in a certain temperature range are acquiring interest in information storage and sensors applications. Facile microwave hydrothermal synthesis route was optimized for the preparation of BiFeO3 (BFO) pure-phase. Influence of process parameters (i.e. precursor ratio, mineralizer concentration, temperature, time) on phase formation, particle size distribution and morphology was investigated in detail. The BFO powders were characterized by XRD, ESEM and TEM. Single phase BFO was formed using KOH, 8 M at 200 °C, 30 min and KOH, 10 M at 180 °C, 30 min; the presence of Na 2CO3, acting as electron donor, allowed the reaction to be performed at lower KOH concentrations and temperatures, 6 and 8 M at 180 °C in 30 min. Particles' morphology evolution with concentration and temperature without Na2CO3 followed the sequence: spherical, lamellar, lamellar semi-cubic, cubic; while with Na2CO3 addition the evolution was: lamellar semi-cubic, cubic and prismatic truncated octahedron shape. © 2012 Elsevier B.V. All rights reserved.

Optimization of BFO microwave-hydrothermal synthesis: Influence of process parameters / Ponzoni, Chiara; Rosa, Roberto; Cannio, Maria; Buscaglia, Vincenzo; Finocchio, Elisabetta; Nanni, Paolo; Leonelli, Cristina. - In: JOURNAL OF ALLOYS AND COMPOUNDS. - ISSN 0925-8388. - ELETTRONICO. - 558:(2013), pp. 150-159. [10.1016/j.jallcom.2013.01.039]

Optimization of BFO microwave-hydrothermal synthesis: Influence of process parameters

PONZONI, Chiara;ROSA, Roberto;CANNIO, Maria;LEONELLI, Cristina
2013

Abstract

Multiferroic materials exhibiting ferromagnetic and ferroelectric properties in a certain temperature range are acquiring interest in information storage and sensors applications. Facile microwave hydrothermal synthesis route was optimized for the preparation of BiFeO3 (BFO) pure-phase. Influence of process parameters (i.e. precursor ratio, mineralizer concentration, temperature, time) on phase formation, particle size distribution and morphology was investigated in detail. The BFO powders were characterized by XRD, ESEM and TEM. Single phase BFO was formed using KOH, 8 M at 200 °C, 30 min and KOH, 10 M at 180 °C, 30 min; the presence of Na 2CO3, acting as electron donor, allowed the reaction to be performed at lower KOH concentrations and temperatures, 6 and 8 M at 180 °C in 30 min. Particles' morphology evolution with concentration and temperature without Na2CO3 followed the sequence: spherical, lamellar, lamellar semi-cubic, cubic; while with Na2CO3 addition the evolution was: lamellar semi-cubic, cubic and prismatic truncated octahedron shape. © 2012 Elsevier B.V. All rights reserved.
2013
558
150
159
Optimization of BFO microwave-hydrothermal synthesis: Influence of process parameters / Ponzoni, Chiara; Rosa, Roberto; Cannio, Maria; Buscaglia, Vincenzo; Finocchio, Elisabetta; Nanni, Paolo; Leonelli, Cristina. - In: JOURNAL OF ALLOYS AND COMPOUNDS. - ISSN 0925-8388. - ELETTRONICO. - 558:(2013), pp. 150-159. [10.1016/j.jallcom.2013.01.039]
Ponzoni, Chiara; Rosa, Roberto; Cannio, Maria; Buscaglia, Vincenzo; Finocchio, Elisabetta; Nanni, Paolo; Leonelli, Cristina
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1107546
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