Hydrothermally assisted synthesis of YMnO₃

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• 作者：Z. Brankovi膰^a ; ^b ; ^{zorica.brankovic@imsi.bg.ac.rs" class="auth_mail" title="E-mail the corresponding author} ; G. Brankovi膰^a ; ^b ; M. Po膷u膷a-Ne&scaron ; i膰^a ; Z. Marinkovi膰 Stanojevi膰^a ; M. 沤uni膰^a ; ^b ; D. Lukovi膰 Goli膰^a ; R. Tararam^b ; M. Cilense^b ; M.A. Zaghete^b ; Z. Jagli膷i膰^c ; ^d ; M. Jagodi膷^c ; J.A. Varela^b
• 关键词：Yttrium manganite ; Hydrothermal synthesis ; Phase evolution ; Magnetic measurements
• 刊名：Ceramics International
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：41
• 期：10
• 页码：14293-14298
• 全文大小：1599 K

文摘

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