Publication: Effect of Firing Conditions on Phase Formation, Microstructure, and Electrical Properties of (K0.5Na0.5)(Nb0.7Ta0.3)O3 Ceramics Synthesized by Solid-State Combustion Method
1
0
Issued Date
2020
Resource Type
File Type
application/pdf
ISSN
3615235
Other identifier(s)
2-s2.0-85089258955
Rights Holder(s)
มหาวิทยาลัยศรีนครินทรวิโรฒ
Bibliographic Citation
Journal of Electronic Materials. Vol 49, No.10 (2020), p.6143-6155
Suggested Citation
Yotthuan S., Charoonsuk T., Vittayakorn N., Thountom S., Suriwong T., Udeye T., Bongkarn T. Effect of Firing Conditions on Phase Formation, Microstructure, and Electrical Properties of (K0.5Na0.5)(Nb0.7Ta0.3)O3 Ceramics Synthesized by Solid-State Combustion Method. Journal of Electronic Materials. Vol 49, No.10 (2020), p.6143-6155. doi:10.1007/s11664-020-08374-6 Retrieved from: https://hdl.handle.net/20.500.14740/4393
Abstract
The effect of the firing conditions on the phase formation, microstructure, and electrical properties of (K0.5Na0.5)(Nb0.7Ta0.3)O3 (KNNT) ceramics synthesized by the solid-state combustion technique using glycine as fuel has been investigated. All samples were calcined at 600°C to 800°C for 2 h and sintered at 1150°C to 1190°C for 2 h to 5 h. Pure KNNT powders were produced after calcination at 600°C for 2 h. The average particle size increased when the calcination temperature was increased. The KNNT powder calcined at 600°C for 2 h showed rather square morphology with average particle size of ∼ 160 nm. The x-ray diffraction (XRD) analysis results for the ceramics revealed the presence of orthorhombic (O) and tetragonal (T) phases in all samples. When sintering at 1150°C for 4 h, the O:T ratio was 50:50, as verified by the Rietveld refinement technique. The average grain size, density values, and dielectric properties tended to increase when the dwell time was increased from 2 h to 4 h, but then degraded. The KNNT ceramic produced at the optimum firing condition (1150°C for 4 h) showed good crystalline morphology, the highest density (ρ = 5.28 g/cm3), the highest dielectric constant (εC = 5002), and good ferroelectric behavior (Pr = 18.50 μC/cm2 and Ec = 9.04 kV/cm). © 2020, The Minerals, Metals & Materials Society.
Subject(s)
Amino acids
Calcination
Combustion
Dielectric properties
Grain size and shape
Microstructure
Particle size
Particle size analysis
Rietveld refinement
Sintering
X ray diffraction analysis
Average grain size
Average particle size
Calcination temperature
Combustion method
Combustion technique
Crystalline morphologies
Ferroelectric behavior
Refinement techniques
Morphology
Calcination
Combustion
Dielectric properties
Grain size and shape
Microstructure
Particle size
Particle size analysis
Rietveld refinement
Sintering
X ray diffraction analysis
Average grain size
Average particle size
Calcination temperature
Combustion method
Combustion technique
Crystalline morphologies
Ferroelectric behavior
Refinement techniques
Morphology