Effect of Tb3+ doping on the preferred orientation of lead titanate thin film prepared by sol–gel method on ITO/glass substrates
Effect of Tb3+ doping on the preferred orientation of lead titanate thin film prepared by sol–gel method on ITO/glass substrates
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DOI：
10.1016/j.surfcoat.2004.10.035
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发表时间：
2005-08
影响因子：
5.4
通讯作者：
P. Du;L. Tang;Xiaohui Zhao;W. Weng;G. Han
中科院分区：
文献类型：
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作者：
P. Du;L. Tang;Xiaohui Zhao;W. Weng;G. Han
采用溶胶-凝胶法在ITO/玻璃衬底上制备了Tb掺杂PbTiO 3（PT）薄膜。用XRD分析了薄膜的相组成。结果表明，在PbTiO 3体系中掺入Tb，通过快速热处理，可以在无定向ITO/玻璃衬底上形成具有高度（100）择优取向的钙钛矿相PbTiO 3薄膜。Tb掺杂PbTiO 3薄膜的（100）择优取向归因于Tb掺杂和快速热制备过程诱导的钙钛矿PbTiO 3相的异质形核机制。根据这一机理成功地解释了PbTiO 3薄膜中（100）取向的Tb掺杂钙钛矿相含量随Tb掺杂浓度的变化。发现了获得高度（100）取向和结晶良好的PbTiO 3薄膜的最佳Tb掺杂浓度。并推导出钙钛矿相含量与Tb掺杂浓度的理论关系式。
Tb doped PbTiO3(PT) thin films were prepared on ITO/glass substrates by sol–gel method. XRD was used to investigate the phase status of the thin films. It is shown that through rapid thermal process, the perovskite phase PbTiO3thin films with highly (100) preferred orientation could be formed on the astatic ITO/glass substrates when Tb is doped into PbTiO3system. The (100) preferred orientation of Tb-doped PbTiO3films is attributed to the heterogeneous nucleation mechanism of the perovskite PbTiO3phase induced by Tb doping and rapid thermal preparation process. It is successfully explained according to this mechanism that the content of the (100) oriented Tb-doped perovskite phase in PbTiO3films varies with Tb doping concentration. An optimal doping concentration of Tb to achieve highly (100) oriented and well-crystallized PbTiO3films is discovered. And a theoretical equation of the perovskite phase content as a function of Tb doping concentration is deduced.