Effects of sintering temperature on the electric properties of Mn-modified BiFeO3-BaTiO3 bulk ceramics

Kim, D. J.; Lee, M. H.; Park, J. S.; Kim, M. H.; Song, Tae Kwon; Kim, W. J.; Jang, Ki Wan; Kim, S. S.; Do, D.

doi:10.3938/jkps.66.1115

Cited by 24 publications

(4 citation statements)

References 26 publications

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“…Figure shows the electrical properties of all samples measured at room temperature. Similar to the reported literatures related to BF‐based ceramics, [ 9,15,32 ] enhanced ferroelectric properties together with strain response especially for negative strain are obtained after the introduction of Mn as shown in Figure 5a, and the increased coercive field can partly reflect the hardening behavior after Mn doping. Many views on the hardening behavior in ferroelectric materials is relevant to the acceptor‐oxygen‐vacancy defect dipoles, and then the domain wall may be pinned by defect dipoles.…”

Section: Resultssupporting

confidence: 88%

Property Regulation Principle in Mn‐Doped BF–BT Ceramics: Competitive Control of Domain Switching By Defect Dipoles and Domain Configuration

Zheng

et al. 2022

Adv Elect Materials

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Mn‐doping is reported to be an effective strategy to obtain better electrical property in bismuth ferrite‐barium titanate (BF‐BT)‐based ceramics, while the property regulation principle and its potential physical mechanism is still poorly understood. For disclose the veil of Mn‐doping enhancing properties, the typical material system BF‐BT–xMnO2 mol% is designed and the effects of Mn‐doping on multilevel structures and external fields stimulated electrical properties are deeply investigated. Mn‐doping induced structure disorder and defect dipoles lead to the formation of nanodomain and the variation of local structure, contributing to intrinsic enhancement of polarization. Especially, electrical properties under different electric and temperature fields reveal that there is a competitive control of domain switching by defects and domain configuration, which is also verified by domain writing technology and switching spectroscopy piezore‐sponse force microscopy. That is, the defect dipoles have pinning effect on domain to hinder domain switching, leading to smaller polarization and indistinctive electrostrain at low fields. While the nanodomain reduces intrinsic coercive field and promotes domain switching, generating much larger polarization and electrostrain at high fields. lt is believed the decoding of domain switching behavior controlled by defect and domain can provide a paradigm to understand the property evolution in chemically modified BF‐BT.

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Section: Resultssupporting

confidence: 88%

Property Regulation Principle in Mn‐Doped BF–BT Ceramics: Competitive Control of Domain Switching By Defect Dipoles and Domain Configuration

Zheng

et al. 2022

Adv Elect Materials

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“…is is because the higher sintering temperature and dwell time can enlarge the diffusion coefficient and make grain boundary migration easier [8]. In the present case, increasing the sintering temperature and dwell time improved densification as well as the grain growth.…”

Section: Resultsmentioning

confidence: 57%

“…It is a typical ferroelectric material with a tetragonal symmetry of perovskite structure at room temperature [5]. It is known that an appropriate amount of doping into the BaTiO 3 can produce piezoelectricity comparable with Pb(Zr x Ti 1−x )O 3 -based ceramics [5][6][7][8][9]. Among modified BaTiO 3 composites, barium stannate titanate (BaTi 1−x Sn x O 3 ) can modify both the microstructure and electrical properties of BaTiO 3 [9].…”

Section: Introductionmentioning

confidence: 99%

Microstructural and Electrical Properties of Sn‐Modified BaTiO₃ Lead‐Free Ceramics by Two‐Step Sintering Method

Kayaphan

Bomlai

2018

Advances in Materials Science and Engineering

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Ba(Ti0.92Sn0.08)O3 lead-free ceramics were prepared using a two-step sintering (TSS) technique. Varying the first sintering temperature T1 (1400 and 1500°C) and the dwell time t1 (0, 15, and 30 min), we obtained dense ceramics which were then soaked at a constant temperature of 1000°C (T2) for 6 h (t2). The structural and electrical properties were investigated. XRD results indicated that all the ceramics showed a pure perovskite phase with tetragonal symmetry. Density and grain size increased with higher T1 temperatures and increased t1 dwell times. Enhanced electrical properties were achieved by sintering at the optimized T1 sintering temperature and t1 dwelling time. At the lower T1 sintering temperature of 1400°C, the dielectric and piezoelectric properties and the Curie temperature of the ceramics were improved significantly by increasing t1 dwell time. Further, increasing the sintering temperature T1 to 1500°C, excellent properties were obtained at t1 = 15 min which then deteriorated when t1 was increased to 30 min. The electrical properties of the sample sintered under the T1/t1/T2/t2 condition of “1500/15/1000/6” showed the best values. For this sample the piezoelectric coefficient (d33), dielectric permittivity (εr), loss factor (tanδ), and Curie temperature (TC) were 490 pC/N, 4385, 0.0272, and 48°C, respectively.

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“…17,18 It has been shown by many researchers that the use of quenching procedures is an effective way to transform the slim ferroelectric polarization-electric field (P-E) loops in BiFeO 3 ceramics into a more open, well-saturated form 19 and consequently it is possible to obtain remarkable functional properties by this means. [20][21][22][23][24][25] For the composition 0.8BF-0.2BT, it was shown that annealing at 800 • C for 20 h followed by water-quenching or furnace-cooling can reduce the coercive field and enhance the ferroelectricity; these effects were attributed to higher rhombohedral distortion, relaxation of lattice strains associated with the A-O bond length, and redistribution of dipolar defects. 26 Recent research on 0.75BF-0.25BT ceramics also reported the tendency for opening of "pinned" loops and the enhancement of ferroelectricity by air quenching, which were attributed to stabilization of the rhombohedral structure due to improved chemical homogeneity.…”

Section: Introductionmentioning

confidence: 99%

Surface structure and quenching effects in BiFeO₃‐BaTiO₃ ceramics

Wang

Hall

2021

J Am Ceram Soc.

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The structure and properties of Mn‐doped 0.67BiFeO3‐0.33BaTiO3 ceramics are systematically investigated with respect to the effects of annealing prior to rapid cooling by quenching in air. Air‐quenching induces a change in crystal structure from pseudo‐cubic to rhombohedral, with higher quenching temperatures leading to an increased rhombohedral distortion. These structural changes are correlated with the appearance of more well‐defined ferroelectric domain configurations. It is shown that the surface preparation procedures for XRD measurements can induce significant changes in the peak profiles, indicating differences in crystal structure between the surface and bulk regions. Frequency dispersion in the temperature‐dependent relative permittivity for the as‐sintered sample is significantly reduced after quenching, accompanied by enhancement of the Curie point and improved temperature‐stability of piezoelectric properties. It is proposed that the formation of defect clusters by A‐site cation diffusion during cooling is circumvented by quenching, leading to the observed modification of structural distortion and ferroelectric properties.

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Effects of sintering temperature on the electric properties of Mn-modified BiFeO3-BaTiO3 bulk ceramics

Cited by 24 publications

References 26 publications

Property Regulation Principle in Mn‐Doped BF–BT Ceramics: Competitive Control of Domain Switching By Defect Dipoles and Domain Configuration

Property Regulation Principle in Mn‐Doped BF–BT Ceramics: Competitive Control of Domain Switching By Defect Dipoles and Domain Configuration

Microstructural and Electrical Properties of Sn‐Modified BaTiO₃ Lead‐Free Ceramics by Two‐Step Sintering Method

Surface structure and quenching effects in BiFeO₃‐BaTiO₃ ceramics

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Effects of sintering temperature on the electric properties of Mn-modified BiFeO3-BaTiO3 bulk ceramics

Cited by 24 publications

References 26 publications

Property Regulation Principle in Mn‐Doped BF–BT Ceramics: Competitive Control of Domain Switching By Defect Dipoles and Domain Configuration

Property Regulation Principle in Mn‐Doped BF–BT Ceramics: Competitive Control of Domain Switching By Defect Dipoles and Domain Configuration

Microstructural and Electrical Properties of Sn‐Modified BaTiO3 Lead‐Free Ceramics by Two‐Step Sintering Method

Surface structure and quenching effects in BiFeO3‐BaTiO3 ceramics

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Product

Resources

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Microstructural and Electrical Properties of Sn‐Modified BaTiO₃ Lead‐Free Ceramics by Two‐Step Sintering Method

Surface structure and quenching effects in BiFeO₃‐BaTiO₃ ceramics