Hydrothermally assisted synthesis of YMnO3

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Brankovic, Z. ; Brankovic, G. ; Pocuca-Nesic, M. ; Stanojevic, Z. Marinkovic ; Zunic, M. ; Golic, D. Lukovic ; Tararam, R. ; Cilense, M. ; Zaghete, M. A. ; Jaglicic, Z. ; Jagodic, M. ; Varela, J. A.

• Tipo de documento: Artigo Científico
• Fonte: CERAMICS INTERNATIONAL; v. 41, n. 10, p. 6-pg., 2015-12-01.

Resumo

In this work single phase hexagonal YMnO3 powders were prepared starting from Y(CH3COO)(3)center dot xH(2)O, Mn(CH3COO)(2)center dot 4H(2)O, KMnO4 and KOH using methods of conventional (280 degrees C for 6 h) or microwave assisted hydrothermal synthesis (200 degrees C for 2 h) followed by calcination at 1200 degrees C for 2 h. According to FESEM analysis the calcined powders consisted of submicronic YMnO3 particles, which were uniform in shape and size. Ceramic samples were obtained by sintering the as-synthesized powders at 1400 degrees C for 2 h. XRD analysis confirmed the presence of the single phase hexagonal YMnO3. SEM analysis showed a dense and homogeneous microstructure with typical inter- and intra-grain cracks. Magnetic measurements indicated ferrimagnetic properties that were explained by non-stoichiometry of the obtained compound and an excess of manganese that was confirmed by ICP analysis. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved. (AU)

• Processo FAPESP: 11/00922-0 - Síntese sovoltérmica de manganitas multiferróicos com morfologia e tamanho de grãos controlados
• Beneficiário: José Arana Varela
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisador Visitante - Internacional