Chemical investigation of Fe3+/Nb5+-doped barium titanate ceramics
Chemical investigation of Fe3+/Nb5+-doped barium titanate ceramics
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DOI：
10.1016/j.ceramint.2012.10.142
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发表时间：
2013-05
影响因子：
5.2
通讯作者：
L. Srisombat;S. Ananta;Burapol Singhana;T. Lee;R. Yimnirun
中科院分区：
文献类型：
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作者：
L. Srisombat;S. Ananta;Burapol Singhana;T. Lee;R. Yimnirun
在掺杂钛酸钡基材料中引入大的可恢复电应变，重新引起了人们对钙钛矿型铁电钛酸钡（BaTiO 3）的兴趣。我们以前的工作表明，基于BaTiO 3的无铅铁电体的高性能的潜力在Fe 3 +/Nb 5+掺杂的BaTiO 3系统中得到证实。BaTiO_3的电子行为与组分的化学状态密切相关。然而，有关的Fe 3 +/Nb 5+掺杂的BaTiO 3陶瓷的离子的化学状态的信息是目前不可用的。因此，本研究描述了烧结混合Fe 3 +/Nb 5+掺杂的BaTiO 3陶瓷的化学状态，与未掺杂的BaTiO 3陶瓷来自相同的处理。通过X射线光电子能谱（XPS）分析表明，Ti的结合能表明掺杂BaTiO 3陶瓷中存在多个Ti组分，而未掺杂BaTiO 3陶瓷中只有一个Ti组分。与Ti不同的是，XPS谱表明在未掺杂和掺杂的BaTiO 3陶瓷中存在不止一种类型的钡和氧物种。
Renewed interest in the perovskite ferroelectric barium titanate (BaTiO3) has been driven by the introduction of large recoverable electrostrain in doped BaTiO3-based materials. Our previous work demonstrated that the potential for high-performance in Pb-free ferroelectrics based on BaTiO3was confirmed in Fe3+/Nb5+-doped BaTiO3systems. It is well documented that the electronic behavior of BaTiO3is intimately related to the chemical state of the constituents. However, information regarding the chemical states of the ions of the Fe3+/Nb5+-doped BaTiO3ceramics is currently unavailable. Consequently, this study describes the chemical state of sintered hybrid Fe3+/Nb5+-doped BaTiO3ceramics, compared with undoped BaTiO3ceramics derived from the same processing. Analysis by X-ray photoelectron spectroscopy (XPS) showed that the binding energy of Ti indicates the presence of more than one component of Ti within the doped BaTiO3ceramics, but only one component of Ti within the undoped BaTiO3ceramics. Unlike Ti, the XPS spectra indicates that more than one type of barium and oxygen species exist in both undoped and doped BaTiO3ceramics.