Firing Temperatures Effect on Phase Formation, Microstructure and Electrical Properties of BNBKL Ceramics Fabricated via the Solid-State Combustion Technique

Lead-free 0.85Bi 0.5 Na 0.475 Li 0.025 TiO 3 -0.11Bi 0.5 K 0.5 TiO 3 -0.04BaTiO 3 (BNBKL) ceramics were prepared by the solid-state combustion technique. The BNBKL powders and ceramics were calcined and sintered between 650 to 850 °C for 1-5 h and 1100 to 1140 °C for 2 h, respectively. The effect of...

Full description

Saved in:
Bibliographic Details
Published in:Integrated ferroelectrics 2023-11, Vol.239 (1), p.315-327
Main Authors: Klinbanmor, Metarsit, Vittayakorn, Naratip, Rittidech, Aurawan, Bongkarn, Theerachai
Format: Article
Language:English
Subjects:
BNBKL
Ceramics
Combustion
Density
dielectric and ferroelectric
Diffraction patterns
Electrical properties
Grain size
Hysteresis loops
Lead free
Microstructure
Perovskites
Roasting
Sintering
Sintering (powder metallurgy)
Solid phases
Solid state
solid-state combustion
Temperature
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Lead-free 0.85Bi 0.5 Na 0.475 Li 0.025 TiO 3 -0.11Bi 0.5 K 0.5 TiO 3 -0.04BaTiO 3 (BNBKL) ceramics were prepared by the solid-state combustion technique. The BNBKL powders and ceramics were calcined and sintered between 650 to 850 °C for 1-5 h and 1100 to 1140 °C for 2 h, respectively. The effect of firing temperatures on the phase structure, microstructure, and electrical properties of BNBKL ceramics was investigated. X-ray diffraction patterns of BNBKL powders showed a pure perovskite phase structure at a calcination temperature of 800 °C for 3 h. The BNBKL ceramics sintered at different temperatures possessed coexisting rhombohedral (R) and tetragonal (T) phases. The ceramic grains showed a polyhedral shape with directionless growth. The average grain size of the BNBKL ceramics increased from 0.80 to 1.26 µm when the sintering temperature increased from 1100 to 1140 °C. The density of the BNBKL ceramics increased as the sintering temperature increased up to 1120 °C, after that it decreased. The highest density (6.05 g/cm 3 ) and dielectric constant (5855), were obtained at the sintering temperature of 1120 °C. As the sintering temperature increased, the polarization hysteresis loops (P-E loops) of the BNBKL ceramics exhibited less saturation and were more pinched, indicating more relaxor behavior.
ISSN:1058-4587
1607-8489
DOI:10.1080/10584587.2023.2234603