Hydrothermally assisted synthesis of YMnO3
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 analysi...
| Autores: | , , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2015 |
| País: | Brasil |
| Institución: | Universidade Estadual Paulista (UNESP) |
| Repositorio: | Repositório Institucional da UNESP |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.unesp.br:11449/167933 |
| Acceso en línea: | http://dx.doi.org/10.1016/j.ceramint.2015.07.060 http://hdl.handle.net/11449/167933 |
| Access Level: | acceso abierto |
| Palabra clave: | Hydrothermal synthesis Magnetic measurements Phase evolution Yttrium manganite |
| Sumario: | 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. |
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