Synthesis of homologous compounds Fe₂O₃(ZnO)_m (m=6, 8, 34) by various selective microwave heating conditions

详细信息    查看全文

• 作者：Daisuke Nagao ; Jun Fukushima ; ^{fukushima@aim.che.tohoku.ac.jp" class="auth_mail" title="E-mail the corresponding author} ; Yamato Hayashi ; Hirotsugu Takizawa
• 关键词：Homologous compounds ; Natural superlattice ; Microwave synthesis ; Selective heating
• 刊名：Ceramics International
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：41
• 期：10
• 页码：14021-14028
• 全文大小：1779 K

文摘

Homologous compounds, Fe₂O₃(ZnO)_m, with a modulated natural superlattice structure, were synthesized within 10 min at 1200 °C in a simple solid-state reaction under 2.45 and 28 GHz microwave irradiation. Transmission electron microscopy and energy dispersive X-ray spectroscopy results revealed that m decreased with increasing the synthesis temperature and microwave frequency. In the Zn–Fe–O system, 纬-Fe₂O₃ was heated in H and E-field and ZnO was heated in E-field under 2.45 GHz microwave irradiation. However, 伪, 纬-Fe₂O₃ and calcined ZnO were heated under 28 GHz microwave irradiation. This selective microwave heating resulted in the different diffusion conditions than conventional heating; therefore, homologous compounds with low m values were rapidly synthesized at low temperature.