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Photoluminescence, Structural, and Electrical Properties of Erbium‐Doped Na 0.5 Bi 4.5 Ti 4 O 15 Ferroelectric Ceramics
Author(s) -
Jiang Xingan,
Jiang Xiangping,
Chen Chao,
Tu Na,
Chen Yunjing,
Zhang Banchao
Publication year - 2016
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.14115
Subject(s) - orthorhombic crystal system , materials science , rietveld refinement , raman spectroscopy , analytical chemistry (journal) , photoluminescence , ferroelectricity , dielectric , ceramic , ferroelectric ceramics , octahedron , perovskite (structure) , mineralogy , crystallography , crystal structure , chemistry , metallurgy , optics , optoelectronics , physics , chromatography
Structural, electrical, and up‐conversion ( UC ) properties of Na 0.5 Bi 4.5‐ x Er x Ti 4 O 15 (NBT– x Er 3+ ) (0.00 < x < 0.40) ceramics have been studied. All the ceramic samples possessed a single‐phase orthorhombic structure. The unit cell volume, the lattice parameters a , b , and c , and orthorhombic distortion analyzed on the basis of Rietveld refinement were observed to decrease with increasing Er 3+ contents ( x ). The average values of grain size were found to slightly decrease with increasing x . Raman spectroscopy revealed that (Bi 2 O 2 ) 2+ layers remained unaffected in the modified compositions, and Er 3+ substitution for Bi 3+ occurred predominantly at the A‐site in the perovskite blocks causing the cationic disorder and a slight decrease in the TiO 6 octahedral distortion. NBT– x Er 3+ ceramic with x = 0.20 achieved the optimized photoluminescence. The relative intensity of green and red UC emissions could be tuned by changing Er 3+ ions concentrations. Ferroelectric measurements revealed that Er 3+ doping led to reduction in 2 P r and 2 E c . However, dielectric measurements showed that the incorporation of Er 3+ ions increased T c with simultaneously lowered tanδ at high temperature, implying that this ceramics can be suitable for high‐temperature sensor applications.