Sol-gel synthesis and dielectric properties of Ruddlesden-Popper phase Sr_n+1Ti_nO_3n+1 (n=1, 2, 3, 鈭?

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• 作者：Wenwen Ge ; Chunhui Zhu ; Heping An ; Zhuangzhi Li ; Guide Tang ; Denglu Hou
• 关键词：A. Sol&ndash ; gel ; C. Dielectric properties ; Srn+1TinO3n+1 ; Nanoscale powders
• 刊名：Ceramics International
• 出版年：January, 2014
• 年：2014
• 卷：40
• 期：1_part_PB
• 页码：1569-1574
• 全文大小：1015 K

文摘

A series of high purity Ruddlesden-Popper phase Sr_n+1Ti_nO_3n+1 (n=1, 2, 3, 鈭? nanoscale powders have been produced by the sol-gel method. The final sintering temperatures of SrTiO₃, Sr₄Ti₃O₁₀, Sr₃Ti₂O₇ and Sr₂TiO₄ determined by TG-DSC analysis were 800 掳C, 950 掳C, 1050 掳C and 1050 掳C, respectively. The single phase structures of the four powders were identified by X-ray diffraction analysis. The different molecular structures and the different vibration bands were studied by Fourier transform infrared absorption spectroscopy and Raman spectroscopy. The dielectric constants of SrTiO₃, Sr₄Ti₃O₁₀, Sr₃Ti₂O₇ and Sr₂TiO₄ were measured to be 114, 55, 41 and 30, respectively, at 100 kHz. The dielectric losses of the four materials were found to be lower than 4脳10^鈭? above 100 kHz.