Abstract
We propose a method to quantitatively characterize the fine phase transition processes of Li+/Er3+∶BaTiO3(BLET)ferroelectric materials by observing fluorescence wavelength shift.A lithium and erbium co-doped barium titanate ferroelectric ceramic was fabricated and the down-conversion infrared fluorescence spec-tra of the transition 4I13/2 → 4I15/2 were measured as a function of temperature.The three structural phase transition processes,namely rhombohedral-orthorhombic,orthorhombic-tetragonal,and tetragonal-cubic transformations,determined by X-ray diffraction results are accompanied by corresponding changes in the position of the fluorescence peaks,yielding an exact consistency.This contactless,non-destructive and spatially-resolved fluorescence method provides a localized quantitative analysis for the phase tran-sition processes of BLET ceramics.As this method is based on the fluorescence peak wavelength depen-dence on the crystal environment,it may potentially be used to characterize the phase transitions in other ferroelectric materials.
基金项目
National Key Basic Research Program of China(2013CB632900)
National Natural Science Foundation of China(NSFC)(11304061)
NETL
NSTL
万方数据