Enhanced pyroelectric and piezoelectric responses in W/Mn-codoped Bi4Ti3O12 Aurivillius ceramics

Tang, Yanxue; Shen, Zong–Yang; Du, Qiuxiang; Zhao, Xiangyong; Wang, Feifei; Qin, Xiaomei; Wang, Tao; Shi, Wangzhou; Sun, Dazhi; Zhou, Zhiyong; Zhang, Shujun

doi:10.1016/j.jeurceramsoc.2018.08.025

Cited by 57 publications

(21 citation statements)

References 31 publications

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“…In order to overcome this challenge, hybrid harvesting has drawn significant interest by coupling two or more effects. Most research on hybrid harvesting has been carried out for the following purposes: development to enhance the properties of materials [17,18], fabrication of a multi-layered nanogenerator for better performance [19,20] (various examples were reviewed in [21]), or proposal of a new mechanism [22,23].…”

Section: Introductionmentioning

confidence: 99%

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Coupling of piezo- and pyro-electric effects in miniature thermal energy harvesters

Kang

Yeatman

2020

Applied Energy

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Thermal energy harvesting from ambient heat into electricity is of interest due to its wide potential applicability. This paper demonstrates a moving beam thermal energy harvesting mechanism exploiting both pyro-and piezo-electric effects simultaneously, for use adjacent to a heat source with small temperature variations at low frequency (below 0.1 Hz). For the first time, the relative contributions of these two mechanisms in such a device is established both theoretically and experimentally, and a dynamic model is provided. The relative phase of the contributed currents is shown to be a critical factor, and methods are introduced to optimise this phase relationship, particularly by selection of the mechanical configuration. The reported prototype achieves around 0.4 µW for a temperature difference of around 15 K at frequency 0.02 Hz with an optimal condition in the fixed-fixed configuration about 90 % above the fixed-free end configuration.

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Section: Introductionmentioning

confidence: 99%

“…For materials, Zhang et al studied porosity alignment of PZT ceramics to achieve high energy harvesting performance [17]. Tang et al improved the properties of Bi 4 T i 3 O 12 (BiT) ceramics by doping [18]. Flexible hybrid nanogenerators suitable for wearable devices have been fabricated made up of several layers.…”

Section: Introductionmentioning

confidence: 99%

Coupling of piezo- and pyro-electric effects in miniature thermal energy harvesters

Kang

Yeatman

2020

Applied Energy

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“…However, opposite results had been obtained for Mn, W/Mn, Nb/Mg, and Li/Ce/ Sc-doped BIT ceramics. 23,38,47,48 Based on these results, these oxygen vacancies were treated as extrinsic oxygen vacancy (V •• oe ), which might not participate in the conductive process as the motion of these oxygen vacancies was restricted around defect central (Mn ′ Ti , Mg ′′ Ti , Sc ′ Ti ) by forming strong combined defect dipole. 38,47,48 Nevertheless, the excess extrinsic oxygen vacancies produced by the Cu 2+ ion dopants would reduce the number of intrinsic oxygen vacancies, because the equilibrium concentration of oxygen vacancies should be maintained for the BTCT ceramics.…”

Section: Resultsmentioning

confidence: 99%

“…38,47,48 Nevertheless, the excess extrinsic oxygen vacancies produced by the Cu 2+ ion dopants would reduce the number of intrinsic oxygen vacancies, because the equilibrium concentration of oxygen vacancies should be maintained for the BTCT ceramics. 23 Similar defect dipole Cu �� Ti − V •• oe might also be formed in the Cu/Ta co-doped BIT ceramics, which reduced the number of intrinsic oxygen vacancies and improved the resistivity of BTCT ceramics (Equation 8). In addition, the decrease in the oxygen vacancies concentration might be also responsible for the suppressed dielectric anomaly and lower tanδ in the temperature range 300°C-600°C for the co-doped ceramics.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, high d 33 values of 20, 17, and 18 pC/N have been reported for Mg/Nb, Zn/Nb, and Cu/Nb co‐doped BIT ceramics, respectively . Moreover, co‐doping of W/Ni, W/Mn, and W/Cr in BIT ceramics effectively improved the piezoelectric properties with the d 33 values of 18.5, 21, and 28 pC/N, respectively . Although d 33 value is not very prominent among the reported BIT ceramics, it still implies the great potential of B‐site co‐doping by high‐ and low‐valence cations for developing BIT‐based ceramics with high piezoelectric activities.…”

Section: Introductionmentioning

confidence: 99%

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Large enhancement of piezoelectric properties and resistivity in Cu/Ta co‐doped Bi₄Ti₃O₁₂ high‐temperature piezoceramics

Chen

Sheng

et al. 2019

J Am Ceram Soc

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In this study, the electrical properties of Bi4Ti3O12‐based Aurivillius‐type ceramics were tailored by a B‐site co‐doping strategy combining high valence Ta5+ and low valence Cu2+. A series of Bi4Ti3−x(Cu1/3Ta2/3)xO12 (BTCT) (x = 0, 0.005, 0.01, 0.015, 0.02, 0.025, and 0.03) ceramics were prepared by the conventional solid‐state reaction method. The effect of Cu/Ta co‐doping on the crystal structure, microstructure, dielectric properties, piezoelectric properties, ferroelectric properties, and electrical conductivity of these ceramics was systematically investigated. Co‐doping significantly enhanced the piezoelectric properties and DC electrical resistivity of the resulting composites. The optimized comprehensive performances were obtained at x = 0.015 with a large piezoelectric coefficient (34 pC/N) and a relatively high resistivity of 9.02 × 106 Ω cm at 500°C. Furthermore, the ceramic also exhibited stable thermal annealing behaviors and excellent fatigue resistance. The results of this study demonstrated great potential of the Cu/Ta co‐doped Bi4Ti3O12 ceramics for high‐temperature piezoelectric device applications.

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Realizing Super‐High Piezoelectricity and Excellent Fatigue Resistance in Domain‐Engineered Bismuth Titanate Ferroelectrics

Xie,

Xu,

Chen

et al. 2024

Adv Funct Materials

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Bismuth titanate (BIT) is widely known as one of the most prospective lead‐free ferroelectric and piezoelectric materials in advanced high‐temperature sensing applications. Despite significant advances in developing BIT ferroelectrics, it still faces major scientific and engineering challenges in realizing super‐high performance to meet next‐generation high‐sensitivity and light‐weight applications. Here, a novel ferroelectric domain‐engineered BIT ceramic system is conceived that exhibits super‐high piezoelectric coefficient (d33 = 38.5 pC N−1) and inverse piezoelectric coefficient (d33* = 46.7 pm V−1) at low electric field as well as excellent fatigue resistance (stable up to 107 cycles). The results reveal that the introduction of high‐density layered (001)‐type 180° domain walls with flexible polarization rotation features and the formation of small‐size multi‐domain states with low energy barriers are mainly responsible for the excellent electrical performance. To the best of knowledge, it is the first time to reveal such intriguing domain structures in BIT ceramics in detail, especially from the atomic‐scale perspective by using atomic number (Z)‐contrast imaging in combination with atomic‐resolution polarization mapping. It is believed that this breakthrough conduces to comprehensively understand structural features of ferroelectric domains in BIT ceramics, and also opens a window for future developments of super‐high performance in bismuth layer‐structured ferroelectrics via domain engineering.

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Enhanced pyroelectric and piezoelectric responses in W/Mn-codoped Bi4Ti3O12 Aurivillius ceramics

Cited by 57 publications

References 31 publications

Coupling of piezo- and pyro-electric effects in miniature thermal energy harvesters

Coupling of piezo- and pyro-electric effects in miniature thermal energy harvesters

Large enhancement of piezoelectric properties and resistivity in Cu/Ta co‐doped Bi₄Ti₃O₁₂ high‐temperature piezoceramics

Realizing Super‐High Piezoelectricity and Excellent Fatigue Resistance in Domain‐Engineered Bismuth Titanate Ferroelectrics

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Enhanced pyroelectric and piezoelectric responses in W/Mn-codoped Bi4Ti3O12 Aurivillius ceramics

Cited by 57 publications

References 31 publications

Coupling of piezo- and pyro-electric effects in miniature thermal energy harvesters

Coupling of piezo- and pyro-electric effects in miniature thermal energy harvesters

Large enhancement of piezoelectric properties and resistivity in Cu/Ta co‐doped Bi4Ti3O12 high‐temperature piezoceramics

Realizing Super‐High Piezoelectricity and Excellent Fatigue Resistance in Domain‐Engineered Bismuth Titanate Ferroelectrics

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Large enhancement of piezoelectric properties and resistivity in Cu/Ta co‐doped Bi₄Ti₃O₁₂ high‐temperature piezoceramics