Fluorescence-based quantitative characterization of structural phase transitions in Li+/Er3+∶BaTiO3 ferroelectric ceramics

• 作者: Jiaming Li Enwei Sun Yaping Ma Huashan Zheng Hua Zhao Zhiguo Zhang
• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2021,（33）
• 页码范围: 143-147
• 页数: 5页
• 语种: 英文

摘要

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.