Effect of sintering temperature of NBT–6BT lead-free ceramics on the structural, ferroelectric and piezoelectric properties

Turki, Olfa; Slimani, Ahmed; Sassi, Z.; Khemakhem, H.; Abdelmoula, N.; Lebrun, Laurent

doi:10.1007/s00339-022-05327-0

Cited by 14 publications

(3 citation statements)

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“…32,[45][46][47] The conventionally sintered BN6BT ceramics always have ε r values higher than 1500 and tanδ of 0.04-0.05. 32,46,47 Here, via cold sintering followed by annealing, the dense ceramics S1/2 and S1/4 with the same composition were obtained at the relatively low temperature of 950 • C, which have smaller grains (mean sizes 0.28 µm @S1/2; 0.31 µm @S1/4), similar ε r values (1347 @S1/2; 1549 @S1/4), and lower tanδ values (∼0.04) at room temperature. By means of the solidstate sintering method using the precursor powders with nanometer grains, the grain sizes of the BN6BT ceramics can be decreased (AGS ∼ 0.4 µm), whereas the sintering temperature is still as high as 1120 • C for densification.…”

Section: Resultsmentioning

confidence: 99%

“…Relative density ( ρ r ), AGS, dielectric, and ferroelectric properties of the BN6BT ceramics in this work are compared with those reported by others (Table 2). By means of a conventional solid‐state sintering method, the dense BN6BT ceramics with ρ r ≥ 94.5% need to be sintered at the very high temperatures (≥1150°C), inducing large grains with AGS > 1.3 µm 32,45–47 . The conventionally sintered BN6BT ceramics always have ε r values higher than 1500 and tan δ of 0.04–0.05 32,46,47 .…”

Section: Resultsmentioning

confidence: 99%

“…By means of a conventional solid‐state sintering method, the dense BN6BT ceramics with ρ r ≥ 94.5% need to be sintered at the very high temperatures (≥1150°C), inducing large grains with AGS > 1.3 µm 32,45–47 . The conventionally sintered BN6BT ceramics always have ε r values higher than 1500 and tan δ of 0.04–0.05 32,46,47 . Here, via cold sintering followed by annealing, the dense ceramics S1/2 and S1/4 with the same composition were obtained at the relatively low temperature of 950°C, which have smaller grains (mean sizes 0.28 µm @S1/2; 0.31 µm @S1/4), similar ε r values (1347 @S1/2; 1549 @S1/4), and lower tan δ values (∼0.04) at room temperature.…”

Section: Resultsmentioning

confidence: 99%

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BN6BT ceramics via cold‐sintering with annealing: Effects of grain size of precursor powders and annealing temperature

Lian,

He,

Liang

et al. 2023

J Am Ceram Soc.

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In this work, (Bi0.5Na0.5)0.94Ba0.06TiO3 (BN6BT) lead‐free ceramics were prepared via cold‐sintering followed by annealing, and effects of grain size of precursor powders and annealing temperature on microstructure, dielectric, and ferroelectric properties of the ceramics were studied. The precursor powders for cold sintering were obtained by mixing the powders with sub‐micrometer (average grain size, AGS = 0.26 μm) and nanometer (AGS = 73 nm) grains in various mass ratios (1:0, 1:1, 1:2, and 1:4). The precursor powders were mixed with deionized water and cold sintered at 180°C for 1 h under 500 MPa. The cold‐sintered samples were then annealed at temperatures between 800 and 1000°C for 2 h. For the ratios of 1:2 and 1:4, the corresponding ceramics annealed at 950°C exhibit dielectric and ferroelectric properties similar to those of the BN6BT ceramics sintered at 1170°C via the solid‐state sintering method. The present BN6BT ceramics exhibit dense microstructure with finer grains with AGS = 280 nm, higher breakdown strength (BDS = 160 kV· cm−1) compared to the solid‐state sintered BN6BT ceramics with AGS = 1.6 μm and BDS = 75 kV· cm−1. The results demonstrate that the cold‐sintering followed by annealing is effective in preparing BN6BT ceramics with fine grains and excellent dielectric and ferroelectric properties at relatively low temperatures.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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BN6BT ceramics via cold‐sintering with annealing: Effects of grain size of precursor powders and annealing temperature

Lian,

He,

Liang

et al. 2023

J Am Ceram Soc.

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Improved Dielectric, Magnetic, and Multiferroic Properties of (Bi_0.5Na_0.5)_0.7La_0.3(Ti_0.7Fe_0.3)O₃ Ceramics Synthesis by the Solid‐State Combustion Technique

Kornphom,

Somsri,

Prasertpalichat

et al. 2024

Physica Status Solidi (a)

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Lead‐free (Bi0.5Na0.5)0.7La0.3(Ti0.7Fe0.3)O3 ceramics (abbreviated as BNLTF) are synthesized by the solid‐state combustion technique using glycine as fuel. The effect of the firing temperature (calcined between 700 and 800 °C for 2 h and sintered between at 800 and 900 °C for 2 h) on the phase structure, microstructure, electrical, and magnetic properties is investigated. Pure BNLTF powders are obtained with a calcination temperature of 750 °C for 2 h and the crystal size increases from 47 to 62 nm when the calcination temperature increases from 700 to 800 °C. All sintered BNLTF ceramics show a pure perovskite structure with a rhombohedral phase. The average grain size increases with increasing sintering temperatures. A well‐packed microstructure with the highest density (5.98 g cm−3), good dielectric properties at room temperature (εr ≈ 589 and tanδ ≈ 0.572), soft ferroelectric behavior, and excellent magnetic properties (Ms ≈ 0.091 emu g−1, Mr ≈ 0.0026 emu g−1) is obtained from the ceramic sintered at 875 °C for 2 h. The multiferroic BNLTF ceramic sintered at 875 °C has a maximum magnetoelectric coupling coefficient (αE ≈ 2.08 mV cm−1 Oe−1) when the magnetic field is near 4500 Oe.

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Effect of bulk porosity on the pyroelectric properties of Na0.5Bi0.5TiO3–0.06BaTiO3 ceramics

Saurabh

Patel

2023

J Mater Sci

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Effect of sintering temperature of NBT–6BT lead-free ceramics on the structural, ferroelectric and piezoelectric properties

Cited by 14 publications

References 38 publications

BN6BT ceramics via cold‐sintering with annealing: Effects of grain size of precursor powders and annealing temperature

BN6BT ceramics via cold‐sintering with annealing: Effects of grain size of precursor powders and annealing temperature

Improved Dielectric, Magnetic, and Multiferroic Properties of (Bi_0.5Na_0.5)_0.7La_0.3(Ti_0.7Fe_0.3)O₃ Ceramics Synthesis by the Solid‐State Combustion Technique

Effect of bulk porosity on the pyroelectric properties of Na0.5Bi0.5TiO3–0.06BaTiO3 ceramics

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Effect of sintering temperature of NBT–6BT lead-free ceramics on the structural, ferroelectric and piezoelectric properties

Cited by 14 publications

References 38 publications

BN6BT ceramics via cold‐sintering with annealing: Effects of grain size of precursor powders and annealing temperature

BN6BT ceramics via cold‐sintering with annealing: Effects of grain size of precursor powders and annealing temperature

Improved Dielectric, Magnetic, and Multiferroic Properties of (Bi0.5Na0.5)0.7La0.3(Ti0.7Fe0.3)O3 Ceramics Synthesis by the Solid‐State Combustion Technique

Effect of bulk porosity on the pyroelectric properties of Na0.5Bi0.5TiO3–0.06BaTiO3 ceramics

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Improved Dielectric, Magnetic, and Multiferroic Properties of (Bi_0.5Na_0.5)_0.7La_0.3(Ti_0.7Fe_0.3)O₃ Ceramics Synthesis by the Solid‐State Combustion Technique