Quantitative phase analyses of Eu3+-doped (Na1-x,K-x)(0.5)Bi(0.5)TiO(3)ferroelectric ceramics near morphotropic phase boundary by photoluminescence spectra
Quantitative phase analyses of Eu3+-doped (Na1-x,K-x)(0.5)Bi(0.5)TiO(3)ferroelectric ceramics near morphotropic phase boundary by photoluminescence spectra
复制标题
光致发光光谱对Eu3掺杂(Na1-x,K-x)(0.5)Bi(0.5)TiO(3)铁电陶瓷近同形相界的定量物相分析
DOI：
10.1016/j.ceramint.2019.05.099
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发表时间：
2019
影响因子：
5.2
通讯作者：
Zhou Ji
中科院分区：
文献类型：
--
作者：
Zeng Liang;Zhou Ji
稀土离子掺入铁电体后，可以通过光致发光（PL）光谱探测其相结构，但大多数报道的结果都是定性的。在这项工作中，我们证明了Eu3+离子的PL光谱可以用于（Na1-x,Kx）0.5Bi0.497Eu0.003TiO3（NKBT: Eu）铁电陶瓷的定量物相分析，这些铁电陶瓷的成分接近形态取向相边界（MPB）。利用Judd-Ofelt理论，从“超敏”跃迁到磁偶极子跃迁的发射强度比出发，阐述了其机理。x射线衍射Rietveld细化进一步证实了这一结果。这项工作为NKBT: Eu陶瓷在MPB附近的定量相分析提供了一种简单而实用的方法，该方法有望应用于更多的铁电材料系统。
It is widely reported that rare-earth ions could be used to probe the phase structure by photoluminescence (PL) spectra after doping into ferroelectrics, while most reported results are qualitative. In this work, we show that PL spectra of Eu3+ions could be used to do quantitative phase analyses of (Na1-x,Kx)0.5Bi0.497Eu0.003TiO3(NKBT: Eu) ferroelectric ceramics with compositions near morphotropic phase boundary(MPB). The mechanism was elaborated based on the emission intensity ratios of the “hypersensitive” transition to the magnetic dipole transition with the Judd-Ofelt theory. The results were further confirmed by X-Ray Diffraction Rietveld refinements. This work shows a simple yet practical method for quantitative phase analyses for NKBT: Eu ceramics near MPB, and the method is expected to be applied in more ferroelectric material systems.