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Luminescence and electrical properties of Eu‐modified Bi 0.5 Na 0.5 TiO 3 multifunctional ceramics
Author(s) -
Lun Mengmeng,
Wang Wei,
Xing Zhifeng,
Wan Zhong,
Wu Wanying,
Song Hanzhao,
Wang Yinzhen,
Li Wei,
Chu Benli,
He Qinyu
Publication year - 2019
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.16394
Subject(s) - materials science , ceramic , luminescence , photoluminescence , doping , perovskite (structure) , dielectric , analytical chemistry (journal) , sintering , relative density , mineralogy , piezoelectricity , optoelectronics , composite material , crystallography , chemistry , chromatography
Abstract The Eu 3+ ‐modified Bi 0.5 Na 0.5 TiO 3 (BNT) ceramics have been fabricated by the solid‐state reaction method. The impact of Eu 3+ doping on the structure, photoluminescence, and electrical properties has been studied by XRD, SEM, PL spectra, and LCR meter. X‐ray diffraction analysis reveals that the crystal structure of the samples is well matched with the trigonal perovskite, and the optimal temperature of presintering is 880°C. The Eu 3+ ‐doped BNT ceramics show excellent red fluorescence at 614 nm corresponding to the 5 D 0 → 7 F 2 transition of Eu 3+ under 466 nm excitation and relatively long fluorescence lifetime. The BNT‐0.02Eu ceramic density is up to 5.68 g/cm 3 and the relative density is up to 94.6% with sintering temperature 1075°C. The piezoelectric constant (d 33 ) of samples has been significantly improved up to 110 pC/N by Eu 3+ doping. The BNT‐0.03Eu ceramic presintered at 880°C and sintered at 1050°C has good dielectric properties and excellent luminescence properties. Eu 3+ ‐doped BNT ceramics make it potential applications for novel integrated electro‐optical and multifunctional devices.