Hydrothermally assisted synthesis of YMnO3

• Autor(a) principal: Branković, Z.
• Data de Publicação: 2015
• Outros Autores: Branković, G., Počuča-Nešić, M., Marinković Stanojević, Z., Žunić, M., Luković Golić, D., Tararam, R., Cilense, M., Zaghete, M. A., Jagličić, Z., Jagodič, M., Varela, J. A.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1016/j.ceramint.2015.07.060; http://hdl.handle.net/11449/167933
• topic: Hydrothermal synthesis; Magnetic measurements; Phase evolution; Yttrium manganite

In this work single phase hexagonal YMnO3 powders were prepared starting from Y(CH3COO)3·xH2O, Mn(CH3COO)2·4H2O, KMnO4 and KOH using methods of conventional (280°C for 6h) or microwave assisted hydrothermal synthesis (200°C for 2h) followed by calcination at 1200°C for 2h. 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°C for 2h. 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.