Effects of preparation method on the microstructure and electrical properties of tungsten bronze structure Sr2NaNb5O15 ceramics

Li, Lei; Yang, Bian; Chao, Xiaolian; Wu, Di; Wei, Lingling; Yang, Zupei

doi:10.1016/j.ceramint.2018.09.208

Cited by 17 publications

(3 citation statements)

References 40 publications

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“…30)33) This method has been reported to be effective in suppressing the anisotropic grain growth of TTB compounds. 29),34), 35) Figure 5(b) shows the SEM image of the sample with x = 0.15 prepared by two-step sintering under the conditions described in Section 2. We successfully obtain dense and uniform microstructure for x = 0.15 and 0.20 using the two-step sintering.…”

Section: Resultsmentioning

confidence: 99%

Effect of Ta substitution on the ferroelectric-antiferroelectric phase transition in tetragonal tungsten bronze-type K2NdNb5O15

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Yasuhara

Tsurumi

et al. 2023

J. Ceram. Soc. Japan

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Antiferroelectric (AFE) materials have attracted considerable attention for applications in energy-storage dielectric capacitors. From the viewpoint of energy efficiency, AFEs with slim polarization (P)electric field (E) hysteresis are desirable. Herein, we focused on tetragonal tungsten bronze-type K 2 NdNb 5 O 15 as a candidate for such a material and aimed to control its ferroelectric (FE)AFE phase transition temperature to obtain the AFE phase at room temperature. In this study, K 2 Nd(Nb 1¹x Ta x ) 5 O 15 (x = 00.20) ceramics were prepared using a solid-state reaction method, and their dielectric properties were evaluated. It was established that the incorporation of Ta lowered the FE-AFE phase transition temperature, and the AFE phase was obtained at room temperature for x = 0.15 and 0.20. Through P-E measurements, narrow P-E double hysteresis loops were observed for x = 0.15 and 0.20. These results provide insight into controlling the temperature range of the AFE phase of K 2 NdNb 5 O 15 to around room temperature.

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Section: Resultsmentioning

confidence: 99%

Effect of Ta substitution on the ferroelectric-antiferroelectric phase transition in tetragonal tungsten bronze-type K2NdNb5O15

Abe

Yasuhara

Tsurumi

et al. 2023

J. Ceram. Soc. Japan

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“…Materials of the tetragonal tungsten bronze (TTB) structure type are well-known for their ferroelectric properties [1][2][3][4][5]. Many researchers have investigated these materials for several industrial applications, such as optoelectronics, energy conversions, and chemical sectors [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Crystallographic, Structural, and Electrical Properties of W6+ Substituted with Mo6+ in Crystalline Phases such as TTB Structure

et al. 2023

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Owing to their low dielectric loss and high permittivity values, dielectric ceramics have garnered a lot of interest from the scientific and industrial sectors. These properties allow for their downsizing and use in a variety of electronic circuits. This present work focuses on the impact of the substitution of W6+ with Mo6+ on the structural and dielectric features of the crystalline phases in a similar TTB structure within the Ba0.54Na0.46Nb1.29W(0.37−x)MoxO5 system, with 0 ≤ x ≤ 0.33 mol%. These crystalline phases were elaborated using the conventional solid-state reaction method and analyzed with XRD, Raman, and dielectric techniques. The Rietveld refinement method showed that all these phases are characterized by tetragonal structure and the P4bm space group. The Raman spectra corresponded well to a TTB-like structure, and all the bands were assigned. The dielectric measurements of the prepared ceramic samples facilitated the determination of their phase transition temperature (Tc) and the dielectric responses. This investigation focused on determining dielectric permittivity (ε′) and its correlation with increases in MoO3 content in the ceramic structure.

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“…Sr 0.8 Na 0.4 Nb 2 O 6 (SNN) is a typical tungsten bronzestructured compound with high Curie temperature near 300°C and a dielectric anomaly below room temperature. 27,28 SNN ceramics also show relaxor-like behaviors and outstanding electrical properties. 29 As a typical relaxor ferroelectrics, 0.94BNT-0.06BT has high dielectric, ferroelectric, and piezoelectric performance.…”

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confidence: 99%

High‐temperature dielectric and energy storage properties of Bi_0.5Na_0.5TiO₃‐based ceramics modified by Sr_0.8Na_0.4Nb₂O₆

et al. 2021

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Dielectric capacitors are widely used in fields like pulse power systems, electric vehicles, aerospace and defense technology, and are extremely critical for electronic components. 1,2 Therefore, developing new dielectric materials with wide temperature range of dielectric and energy storage properties are equally important. Many dielectric materials based on BaTiO 3 , BiFeO 3 , (K 0.5 Na 0.5 )NbO 3 , AgNbO 3 and Bi 0.5 Na 0.5 TiO 3 (BNT) have been extensively investigated. 3,

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Effects of preparation method on the microstructure and electrical properties of tungsten bronze structure Sr2NaNb5O15 ceramics

Cited by 17 publications

References 40 publications

Effect of Ta substitution on the ferroelectric-antiferroelectric phase transition in tetragonal tungsten bronze-type K<sub>2</sub>NdNb<sub>5</sub>O<sub>15</sub>

Effect of Ta substitution on the ferroelectric-antiferroelectric phase transition in tetragonal tungsten bronze-type K<sub>2</sub>NdNb<sub>5</sub>O<sub>15</sub>

Crystallographic, Structural, and Electrical Properties of W6+ Substituted with Mo6+ in Crystalline Phases such as TTB Structure

High‐temperature dielectric and energy storage properties of Bi_0.5Na_0.5TiO₃‐based ceramics modified by Sr_0.8Na_0.4Nb₂O₆

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Effects of preparation method on the microstructure and electrical properties of tungsten bronze structure Sr2NaNb5O15 ceramics

Cited by 17 publications

References 40 publications

Effect of Ta substitution on the ferroelectric-antiferroelectric phase transition in tetragonal tungsten bronze-type K<sub>2</sub>NdNb<sub>5</sub>O<sub>15</sub>

Effect of Ta substitution on the ferroelectric-antiferroelectric phase transition in tetragonal tungsten bronze-type K<sub>2</sub>NdNb<sub>5</sub>O<sub>15</sub>

Crystallographic, Structural, and Electrical Properties of W6+ Substituted with Mo6+ in Crystalline Phases such as TTB Structure

High‐temperature dielectric and energy storage properties of Bi0.5Na0.5TiO3‐based ceramics modified by Sr0.8Na0.4Nb2O6

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High‐temperature dielectric and energy storage properties of Bi_0.5Na_0.5TiO₃‐based ceramics modified by Sr_0.8Na_0.4Nb₂O₆