Phase Structure, Microstructure, and Electrical Properties of Bi0.47Na0.47Ba0.06TiO3 Ceramics with (LiNb)4+ Substituted into B-Sites

Due to the substitution of complex ions into B-sites is very interesting in recent, lead-free Bi 0.47 Na 0.47 Ba 0.06 Ti 1− x (LiNb) x O 3 (BNBT 1− x LN x ) ceramics (with x = 0-0.04) were fabricated by the solid-state combustion method. The influence of (LiNb) 4+ (x) on the phase structure, microst...

Full description

Saved in:
Bibliographic Details
Published in:Integrated ferroelectrics 2023-11, Vol.239 (1), p.197-209
Main Authors: Luangpangai, Anupong, Thatawong, Bhoowadol, Charoenthai, Nipaphat, Vittayakorn, Naratip, Bongkarn, Theerachai
Format: Article
Language:English
Subjects:
BNBT
Ceramics
Density
dielectric
Dielectric properties
Diffraction patterns
Electrical properties
Ergodic processes
ferroelectric
Ferroelectricity
Grain growth
Grain size distribution
Lead free
Microstructure
Perovskite structure
Perovskites
phase formation
Phase ratio
Relaxors
Rietveld method
Solid phases
Substitutes
xLNx
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Due to the substitution of complex ions into B-sites is very interesting in recent, lead-free Bi 0.47 Na 0.47 Ba 0.06 Ti 1− x (LiNb) x O 3 (BNBT 1− x LN x ) ceramics (with x = 0-0.04) were fabricated by the solid-state combustion method. The influence of (LiNb) 4+ (x) on the phase structure, microstructure, and electrical properties was investigated. The X-ray diffraction (XRD) patterns exhibited a pure perovskite structure for all specimens. Coexisting rhombohedral and tetragonal phases were observed in all samples and the tetragonal phase increased with increased x, as analyzed by the Rietveld refinement method. The morphology of the BNBT 1− x LN x ceramics, obtained by scanning electron microscopy (SEM), revealed almost-round grain shapes and anisotropic grain growth. The density and average grain sizes decreased from 5.84 to 5.54 g/cm 3 and 1.7 to 0.9 µm, respectively, when x increased from 0 to 0.04. The grain size distribution decreased with increased (LiNb) 4+ content. A reduction in the dielectric properties was observed, due to the phase ratio changing away from a morphotropic phase boundary (MPB), an inferior microstructure, and low density caused by (LiNb) 4+ substitution. The (LiNb) 4+ substitution induced the transition from non-ergodic relaxor to ergodic relaxor ferroelectric state.
ISSN:1058-4587
1607-8489
DOI:10.1080/10584587.2023.2234622