Intrinsic and extrinsic dielectric contributions to the electrical properties in CaZrO3-doped KNN-based electrical/optical multifunctional ceramics

Shi, Wenming; Du, Juan; Zhai, Yuzhi; Chen, Chong; Wei, Yanyan; Li, Wei; Hao, Jigong; Fu, Peng

doi:10.1007/s10853-020-04444-6

Cited by 9 publications

(4 citation statements)

References 44 publications

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“…The cuboidal-shaped grains are in agreement with the KNN-based ceramics reported before. , The average grain size decreases as the content of CaZrO 3 increases, and the calculated grain sizes are 0.45, 0.35, 0.26, and 0.22 μm for KNLNT– x CZ ceramics with x = 8, 10, 12, and 14, respectively, as shown in Figure f–i. It is clearly seen that the addition of CaZrO 3 inhibits grain growth in KNLNT– x CZ ceramics. , In addition, the average grain size of KNLNT– x CZ ceramics decreases linearly with the content of CaZrO 3 increasing (see Figure j).…”

Section: Resultsmentioning

confidence: 90%

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Large Room-Temperature Electrocaloric Response Realized in Potassium-Sodium Niobate by a Relaxor Enhancement Effect and Multilayer Ceramic Construct

Zhao

Yang

et al. 2022

ACS Appl. Mater. Interfaces

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The development of high-performance electrocaloric (EC) materials is crucial for solid-state refrigeration applied in micro-electromechanical systems. Herein, a large room-temperature EC response is realized in (1 – x)(K0.49Na0.49Li0.02)(Nb0.8Ta0.2)O3–xCaZrO3 (KNLNT–xCZ) benefiting from a relaxor enhancement effect and multilayer ceramic construct. The relaxor enhancement effect is because the long-range order is broken by adding CaZrO3, which is in favor of enhancing the temperature change (ΔT) and broadening the temperature span (T span) at room temperature. A ΔT of 0.48 K in the KNLNT–12CZ ceramic is ∼5 times higher than that in the KNLNT–8CZ ceramic at 30 °C. KNLNT–12CZ also exhibits good temperature stability, and the T span is up to 65 K. In addition, the multilayer ceramic construct improves the breakdown electric field (E b) through diminishing defects, leading to a booming ΔT of 3.2 K at 30 °C under 250 kV cm–1 via a direct measurement. The work proposes an avenue for developing high-performance EC materials with a large EC response and broad T span in solid-state refrigeration.

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Section: Resultsmentioning

confidence: 90%

“…It is clearly seen that the addition of CaZrO 3 inhibits grain growth in KNLNT−xCZ ceramics. 33,34 In addition, the average grain size of KNLNT−xCZ ceramics decreases linearly with the content of CaZrO 3 increasing (see Figure 2j). EC response is reliant upon the phase transition that can be reflected by the dielectric phase transition.…”

Section: Resultsmentioning

confidence: 93%

Large Room-Temperature Electrocaloric Response Realized in Potassium-Sodium Niobate by a Relaxor Enhancement Effect and Multilayer Ceramic Construct

Zhao

Yang

et al. 2022

ACS Appl. Mater. Interfaces

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“…A series of research advancements in enhancing the performance of KNN-based ceramics have been studied by doping to create phase boundaries near room temperature. − They have also utilized various characterization methods to conduct structural analysis and investigate the underlying physical mechanisms. In the realm of piezoelectric ceramics, their piezoelectric activity is typically a combination of both intrinsic and extrinsic piezoelectric contributions. ,− The intrinsic contribution to the piezoelectric response refers to the linear piezoelectric effect associated with lattice displacement, primarily dependent on lattice distortion, which is a reversible response. The extrinsic contribution mainly arises from domain motion, including domain wall vibration, domain switching, and domain wall movement, which can be both irreversible and reversible.…”

Section: Introductionmentioning

confidence: 99%

Decoding the Piezo-Contributions of Potassium Sodium Niobate Ceramics

Xing,

Mo,

Cheng

et al. 2024

J. Phys. Chem. C

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The contributions to the piezoelectric coefficient d 33 from the intrinsic contribution, reversible low-field domain wall vibration, and irreversible domain switching and displacement of domain walls have been quantitatively investigated in potassium sodium niobate (KNN) ceramics with different phase structures. By measuring the piezoelectric coefficient at a large field and the piezoelectric hysteresis under subswitching conditions following Rayleigh relations, the intrinsic/extrinsic and reversible/irreversible piezoelectric responses are studied to understand the role of different phase boundaries in enhancing the piezoelectricity. This lattice contribution, reversible domain wall vibration, and irreversible contributions are strongly dependent on the crystal and domain structures of the examined ceramics. The intrinsic, reversible extrinsic, and irreversible extrinsic piezoelectric coefficients can both be enhanced in the phase instability regime for KNN-based ceramics. With respect to the intrinsic piezoelectric contribution ratio, ceramics with an orthorhombic-tetragonal (O-T) region have larger values as compared with those having orthorhombic (O)/ rhombohedral-orthorhombic-tetragonal (R-O-T)/rhombohedral-tetragonal (R-T) regions. For KNN ceramics, the extrinsic piezoelectric response is the major contributor to the high piezoelectricity. Strongly linked to temperature, the intrinsic contributions of O/O-T/R-O-T phases decrease first and then increase near the phase transition temperature of the O phase to the T phase in the temperature range, with an opposite tendency in R-T phases.

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“…Ferroelectric ceramic materials are widely used in several electronic applications, such as sensors, actuators, and transducers [1][2][3][4][5][6][7]. Owing to the environmental restrictions on lead-based materials and their high toxicity, (K 1-x ,Na x ) NbO 3 has drawn much attention as promising lead-free candidates materials instead of lead-based such as PZT due to its excellent performance [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Sub-switching domain effect for analysis the non-linear dielectric behavior of (K0.49 Na0.49Li0.02) (Nb0.98Sb0.02)O3 ceramic based on Rayleigh model

Atito

Shaban

Salem

et al. 2022

J. Korean Ceram. Soc.

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The solid-state sintering technique has been implemented to synthesize (K0.5Na0.5NbO3)-0.02(LiSbO3) (KNN-LS) Pb-free ceramic. The crystal structure, dielectric and ferroelectric properties of the prepared material were investigated. Pure orthorhombic perovskite phase [I(220)/I(002) = 1.68] with Amm2 space group has been detected at room temperature for sintered ceramic. Two anomalous permittivity peaks corresponding to orthorhombic–tetragonal (O–T) phase transition at T = 175 °C and tetragonal–cubic (T–C) phase transition at T = 355 °C have been observed. At polymorphic phase transition, the Rayleigh model shown the extrinsic contributions caused by domain wall motion is about 80%, while the intrinsic contribution attributed to the lattice distortion is about 20%. Ferroelectric properties were investigated in a wide range of temperatures (RT-225)°C. The results shown a conductive material at high temperature due to the higher cation disorder and leakage current above PPT. The present results are interested for understanding the mechanism of t permittivity–temperature behavior of KNN-doped LS ions based on Rayleigh model. The large remnant polarization and low coercive field below PPT make the material a suitable candidate for energy storage application.

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Intrinsic and extrinsic dielectric contributions to the electrical properties in CaZrO3-doped KNN-based electrical/optical multifunctional ceramics

Cited by 9 publications

References 44 publications

Large Room-Temperature Electrocaloric Response Realized in Potassium-Sodium Niobate by a Relaxor Enhancement Effect and Multilayer Ceramic Construct

Large Room-Temperature Electrocaloric Response Realized in Potassium-Sodium Niobate by a Relaxor Enhancement Effect and Multilayer Ceramic Construct

Decoding the Piezo-Contributions of Potassium Sodium Niobate Ceramics

Sub-switching domain effect for analysis the non-linear dielectric behavior of (K0.49 Na0.49Li0.02) (Nb0.98Sb0.02)O3 ceramic based on Rayleigh model

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