In:
Journal of the American Ceramic Society, Wiley, Vol. 99, No. 4 ( 2016-04), p. 1332-1339
Abstract:
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.
Type of Medium:
Online Resource
ISSN:
0002-7820
,
1551-2916
DOI:
10.1111/jace.2016.99.issue-4
Language:
English
Publisher:
Wiley
Publication Date:
2016
detail.hit.zdb_id:
2008170-4
detail.hit.zdb_id:
219232-9
Permalink