Synthesis of textured Bi0.5(Na0.8K0.2)0.5TiO3–Ba0.844Ca0.156(Zr0.096Ti0.904)O3 lead-free ceramics for improving their electrical and energy storage properties

Vuong, Le Dai; Dao, Anh Quang; Tùng, Võ Thanh; Chúc, Nguyễn Hữu; Trac, Nguyen Ngoc

doi:10.1007/s10854-020-04356-w

Cited by 6 publications

(3 citation statements)

References 67 publications

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“…ions ( 0.78 Å) at position B due to similar radii [16]. It is this Sb doping that is responsible for the increase in ceramic density by creating the perfect microstructure of ceramic [17]. Similar findings have been published before [23],…”

Section: Resultssupporting

confidence: 77%

Effects of Sb on structure, micro structure and electrical characteristics of Sb-modified (K0.41Na0.59)NbO3 ceramics

2023

hueuni-jns

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Lead-free (Na0.59K0.41)(Nb1-xSbx)O3 ceramic (x = 0 ÷ 0.12) were prepared by the solid phase reaction method. The influence of Sb concentration on the structure, microstructure and electrical properties of the ceramic was studied. Results indicate that the presence of pure perovskite phase was revealed by XRD patterns recorded for the ceramics, which also showed a shift in structure from orthorhombic to mixed rhombohedral and tetragonal with an increase in x value. At x = 0.06, the ceramics express the best microstructure, the particles were tightly packed with an average particle size of 1.76 µm. The (Na0,59K0,41)(Nb0,94Sb0,06)O3 ceramics have the best dielectric and ferroelectric properties: the ceramic density (r) is 4.48 g/cm3 (relative density: 98.7% of the theoretical value); highest dielectric constant at TC (emax) of 12031; dielectric constant at RT (ε) of 945; low dielectric loss (tanδ) of 0.15; and high remanent polarization (Pr) of 11,2 mC/cm2; and the reactance field (Ec) of 8.7 kV/cm, and the phase transition temperatures (TC) of 372 °C, and (TO-T) of 157 °C.

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Section: Resultssupporting

confidence: 77%

Effects of Sb on structure, micro structure and electrical characteristics of Sb-modified (K0.41Na0.59)NbO3 ceramics

2023

hueuni-jns

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“…A comparison of W rec /E value of the current work with other previous works for lead-free ceramics is presented in Table 1. [59][60][61][62][63][64][65][66][67][68] The W rec /E value for the 0.02 samples is considered high when compared with many previous studies.…”

Section: Ferroelectric Propertiesmentioning

confidence: 99%

Enhanced electrical properties of BNKT–BMN lead-free ceramics by CaSnO₃ doping and their bioactive properties

Tawee,

Boothrawong,

Thammarong

et al. 2024

RSC Adv.

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“…Therefore, lead-free ceramic systems with good ferroelectric and piezoelectric properties must be developed to replace lead-based ceramic systems. (Na x K 1−x )NbO 3 (KNN) [3], Bi 0.5 (Na 0.8 K 0.2 ) 0.5 TiO 3 (BNKT) [4], BaTiO 3 , and Ba(Zr 0.2 Ti 0.8 )O 3 -(Ba 0.7 Ca 0.3 )TiO 3 are some of the recently studied lead-free ceramic systems [5]. It has been previously reported [6,7] that (Na 1/2 K 1/2 )NbO 3 prepared following the solid phase reaction method exhibits good piezoelectric properties (d 33 = 80 pC N −1 , k p = 36%-40%, Q m = 130, and ε r = 290).…”

Section: Introductionmentioning

confidence: 99%

Optimization of the calcination and two-step sintering temperatures of (K_0.48Na_0.48Li_0.04)(Nb_0.95Sb_0.05)O₃ ceramics

Vuong,

Lich,

Cuong

et al. 2023

Mater. Res. Express

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Lead-free (K0.48Na0.48Li0.04)(Nb0.95Sb0.05)O3 (KNLNS) ceramics have been successfully optimized for the calcination and two-step sintering temperatures. The experimental results reveal that the KNLNS powder calcined at 850 or 900 °C presented a pure perovskite phase with an orthorhombic phase. The particle size was in the range of 0.1–0.4 m. The two-step sintering temperature (range: 950 to 1100 °C) significantly affects the structure, microstructure, and electrical properties of KNLNS ceramics. The presence of a pure perovskite phase with good crystallization is observed in all samples. The microstructure was researched by varying the two-step sintering temperature to obtain a dense microstructure and a clear grain boundary in order to optimize their piezoelectric properties. The best electrical properties of KNLNS ceramics were recorded at the optimized temperature of 1050 °C (density (): 4,35 g/cm3; electromechanical coupling factor (kp): 0.33, kt: 0.35; dielectric constant (εr): 849; dielectric loss (tanδ): 0.073; maximum dielectric constant (max at TC): 6659; piezoelectric constant (d33): 195 pC/N; remanent polarization (Pr): 16.1 µC/cm2; energy storage density (Wrec): 0.36 J/cm3; energy storage efficiency (): 48.1%; t2 = 4 h), proving the efficacy of the two-step sintering technique

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Synthesis of textured Bi0.5(Na0.8K0.2)0.5TiO3–Ba0.844Ca0.156(Zr0.096Ti0.904)O3 lead-free ceramics for improving their electrical and energy storage properties

Cited by 6 publications

References 67 publications

Effects of Sb on structure, micro structure and electrical characteristics of Sb-modified (K0.41Na0.59)NbO3 ceramics

Effects of Sb on structure, micro structure and electrical characteristics of Sb-modified (K0.41Na0.59)NbO3 ceramics

Enhanced electrical properties of BNKT–BMN lead-free ceramics by CaSnO₃ doping and their bioactive properties

Optimization of the calcination and two-step sintering temperatures of (K_0.48Na_0.48Li_0.04)(Nb_0.95Sb_0.05)O₃ ceramics

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Synthesis of textured Bi0.5(Na0.8K0.2)0.5TiO3–Ba0.844Ca0.156(Zr0.096Ti0.904)O3 lead-free ceramics for improving their electrical and energy storage properties

Cited by 6 publications

References 67 publications

Effects of Sb on structure, micro structure and electrical characteristics of Sb-modified (K0.41Na0.59)NbO3 ceramics

Effects of Sb on structure, micro structure and electrical characteristics of Sb-modified (K0.41Na0.59)NbO3 ceramics

Enhanced electrical properties of BNKT–BMN lead-free ceramics by CaSnO3 doping and their bioactive properties

Optimization of the calcination and two-step sintering temperatures of (K0.48Na0.48Li0.04)(Nb0.95Sb0.05)O3 ceramics

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Product

Resources

About

Enhanced electrical properties of BNKT–BMN lead-free ceramics by CaSnO₃ doping and their bioactive properties

Optimization of the calcination and two-step sintering temperatures of (K_0.48Na_0.48Li_0.04)(Nb_0.95Sb_0.05)O₃ ceramics