Stabilization of the morphotropic phase boundary in (1−x)BNT-xBCTS ceramics prepared by the solid-state combustion technique

Kornphom, Chittakorn; Yotthuan, Surirat; Kidkhunthod, Pinit; Bongkarn, Theerachai

doi:10.1016/j.radphyschem.2021.109638

Cited by 12 publications

(3 citation statements)

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“…The fine powders were mixed with glycine (C 2 H 5 NO 2 > 99% Ajax, NZ) at a ratio of 1:0.67 in an agate mortar. [22,32] Then, the mixed powders were calcined at 700-900 °C for 2-8 h. The pure BNT-ST-AN powders were ball-milled again with polyvinyl alcohol added as a binder (2 wt% PVA) for 12 h. After re-milling, all mixed suspensions were dried and sieved with a 100-mesh grid and then pressed into green pieces (thickness: %1.2 mm, diameter: %15 mm) under a pressure of 100 MPa. The green pieces were sintered between 1075 and 1175 °C with a dwell time of 2 h. in air, with a heating rate of 5 °C min À1 and allowed to cool down naturally.…”

Section: Methodsmentioning

confidence: 99%

“…[20,21] However, BNT ceramics have low energy storage efficiency due to their large remnant polarization (P r ) at room temperature, which severely limits the energy storage performance. [19][20][21][22] Previous researchers have doped chemical compounds into BNT-based ceramics to form a relaxor ferroelectrics state with breaking ferroelectric long-range order, which resulted in reduced P r and subsequently led to increased energy storage efficiency. [17,18,23]…”

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Enhanced Energy Storage Properties of BNT–ST–AN Relaxor Ferroelectric Ceramics Fabrication by the Solid‐State Combustion Technique

Kornphom

Saenkam

Bongkarn

2022

Physica Status Solidi (a)

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Ferroelectric energy storage materials play essential roles in pulsed power systems and in renewable energy-storage devices. [1][2][3] Lead-containing ferroelectric ceramics, especially (Pb, La)(Zr, Ti)O 3 (PLZT) have been used as a necessary material for energy storage systems due to their excellent energy storage properties. [3][4][5][6] However, as a toxic metal, lead causes harm to the natural environment and human health. Considering these negative effects, leadfree ferroelectric materials, with excellent energy storage properties need to be developed to replace the lead-based materials for energy storage applications. [3,7,8] After receiving intense attention, the density of the stored energy is still unsatisfactory and the efficiency and the thermal stability also need to be improved, which has been a longstanding challenge for developing leadfree ferroelectric materials.Currently, many lead-free ferroelectric materials, for example, SrTiO 3 (ST)-based ceramics, [3] BaTiO 3 (BT)-based ceramics, [9][10][11] BiFeO 3 (BF)-based ceramics, [12,13] AgNbO 3 (AN)-based ceramics, [14] and (Bi 0.5 Na 0.5 )TiO 3 (BNT)-based ceramics [15][16][17][18][19] have been studied and have seen an improvement in their energy storage properties. Bismuth sodium titanate (Bi 0.5 Na 0.5 TiO 3 or BNT) ferroelectric ceramics have aroused extensive research as a potential energy storage material, owing to its large spontaneous polarization (P S ) of over 40 μC cm À2 , which derives from the hybridization of Bi 6p and O 2p orbitals. [20,21] However, BNT ceramics have low energy storage efficiency due to their large remnant polarization (P r ) at room temperature, which severely limits the energy storage performance. [19][20][21][22] Previous researchers have doped chemical compounds into BNT-based ceramics to form a relaxor ferroelectrics state with breaking ferroelectric long-range order, which resulted in reduced P r and subsequently led to increased energy storage efficiency. [17,18,23]

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Section: Methodsmentioning

confidence: 99%

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confidence: 99%

Enhanced Energy Storage Properties of BNT–ST–AN Relaxor Ferroelectric Ceramics Fabrication by the Solid‐State Combustion Technique

Kornphom

Saenkam

Bongkarn

2022

Physica Status Solidi (a)

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“…This technique provides external energy to the chemical reaction from the combustion of a fuel, which can effectively accelerate the chemical reaction, resulting in ultrafine crystalline powders, high density ceramics, and improved electrical properties of the electroceramics. In addition, the firing temperatures and dwell times are reduced compared to the conventional solid-state reaction [14][15][16][17]. Numerous publications have reported the successful fabrication of electroceramics using the solid-state combustion method.…”

Section: Introductionmentioning

confidence: 99%

Phase formation and electrical properties of SBNLT ceramics prepared via combustion technique

Sinkruason

Luangpangai

Charoenthai

et al. 2023

Materials Science and Technology

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This report investigates the effect of firing temperatures on the phase formation, microstructure, electrical, and energy storage properties of lead-free Sr0.3(Bi0.7Na0.67Li0.03)0.5TiO3 (SBNLT) ceramics, synthesised by combustion technique. The samples were calcined between 700°C and 900°C for 2 h and sintered between 1100°C and 1200°C for 2 h. The ceramics exhibited coexisting rhombohedral and tetragonal phases, which were confirmed by the Rietveld refinement technique. A morphotropic phase boundary (MPB) of the rhombohedral and tetragonal phases, with a ratio of 49:51, was obtained at the sintering temperature of 1175°C. The highest maximum dielectric constant ( εmax = 4667), polarisation ( Pmax = 28.80 µC/cm2) and energy density ( W = 0.95 J/cm3), with a breakdown strength of 70 kV/cm, were achieved from the sample sintered at 1175°C.

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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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Stabilization of the morphotropic phase boundary in (1−x)BNT-xBCTS ceramics prepared by the solid-state combustion technique

Cited by 12 publications

References 23 publications

Enhanced Energy Storage Properties of BNT–ST–AN Relaxor Ferroelectric Ceramics Fabrication by the Solid‐State Combustion Technique

Enhanced Energy Storage Properties of BNT–ST–AN Relaxor Ferroelectric Ceramics Fabrication by the Solid‐State Combustion Technique

Phase formation and electrical properties of SBNLT ceramics prepared via combustion technique

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

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Stabilization of the morphotropic phase boundary in (1−x)BNT-xBCTS ceramics prepared by the solid-state combustion technique

Cited by 12 publications

References 23 publications

Enhanced Energy Storage Properties of BNT–ST–AN Relaxor Ferroelectric Ceramics Fabrication by the Solid‐State Combustion Technique

Enhanced Energy Storage Properties of BNT–ST–AN Relaxor Ferroelectric Ceramics Fabrication by the Solid‐State Combustion Technique

Phase formation and electrical properties of SBNLT ceramics prepared via combustion technique

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

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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