Microstructure and dielectric properties of high-entropy Sr0.9La0.1MeO3 (Me: Zr, Sn, Ti, Hf, Mn, Nb) perovskite ceramics

Lou, Zhihao; Xu, Xin; Zhang, Ping; Gong, Lingyun; Chen, Qian; Xu, Jie; Rydosz, Artur; Gao, Feng

doi:10.1016/j.jmrt.2022.09.081

Cited by 10 publications

(9 citation statements)

References 49 publications

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“…Stoichiometric amount of SrCO 3 ( 99%), La 2 O 3 ( 99.9%), TiO 2 ( 99.8%), and sintering aid Bi 2 O 3 ( 99.9%) powders were wet-milled in ethanol for 24 hours using zirconia balls. The fabrication process can be found in our previous work [23,32]. The mixed slurry were dried at 333 K overnight and then calcined in air using an alumina crucible at 1473 K for 4 hours.…”

Section: Methodsmentioning

confidence: 99%

Optimized thermoelectric performance driven by A-site deficient in SrxLa0.1TiO3/Ti composites

Lou

Zhang

Chen

et al. 2023

Preprint

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For thermoelectric applications at high temperatures, perovskite SrTiO3 is a promising contender as an n-type oxide thermoelectric (TE) material. In this work, SrxLa0.1TiO3/Ti composite ceramics were successfully synthesized by solid state reaction with a combination of the A-site cation vacancy and fabricating composite. Through XRD and SEM analysis, a complex microstructure composed of two kinds of titanium oxides was formed after reductive sintering and annealing. In addition, controlling the content of Sr vacancies in the SrxLa0.1TiO3 matrix increased the thermoelectric power factor by optimizing the weighted mobility in the composite, resulting in the highest power factor PF of 425.8 µWm− 1K− 2 and the maximum ZT of 0.16 for the Sr0.875La0.1TiO3/Ti composite through the synergistic optimization of electrical and thermal transport properties. The strategy proposed in this study of design A-site-deficient composites with nano-sized metal paved a new way to fabricate high performance oxide thermoelectric materials.

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Section: Methodsmentioning

confidence: 99%

Optimized thermoelectric performance driven by A-site deficient in SrxLa0.1TiO3/Ti composites

Lou

Zhang

Chen

et al. 2023

Preprint

Self Cite

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“…Under the action of electric field, oxygen octahedral distortion causes the crystal to absorb part of the electric energy during the polarization process, thus limiting the dielectric permittivity fluctuation and forming stable dielectric properties. 69 The improvement of piezoelectric properties by high-entropy engineering is not only realized in perovskite structures, but also in non-perovskite structures such as bismuth layered ceramics. 59,60 The bismuth layered structure ceramics, called as the Aurivillius phase, has a broad application in high temperature devices and information storage owing to their high Curie temperature and fatigue free characteristic.…”

Section: High-entropy Ceramics With High Piezoelectric Propertiesmentioning

confidence: 99%

“…High configuration entropy has an effect on the structural stability and oxygen octahedral distortion. Under the action of electric field, oxygen octahedral distortion causes the crystal to absorb part of the electric energy during the polarization process, thus limiting the dielectric permittivity fluctuation and forming stable dielectric properties 69 …”

Section: High‐entropy Ceramics With High Piezoelectric Propertiesmentioning

confidence: 99%

“…Beyond piezoelectricity, 60,63–66 considerable strides have also been made in ferroelectricity, 53,59,67 relaxor FE behavior, 61 dielectric permittivity and loss, 68,69 and dielectric relaxation 70 in FEs engineering by elevating configuration entropy. For instance, an A‐site equimolar (Pb 0.25 Ba 0.25 Sr 0.25 Ca 0.25 )TiO 3 medium‐entropy relaxor FE system boasting a configuration entropy of 1.39 R demonstrated low loss (<0.015).…”

Section: High‐entropy Ceramics With High Piezoelectric Propertiesmentioning

confidence: 99%

“…(A) Crystal structure and selected area electron diffraction of Sr 0.9 La 0.1 (Zr 0.25 Sn 0.25 Ti 0.25 Hf 0.25 )O 3 system, ( ooo )/2 and ( ooe )/2 types superlattice diffractions suggest antiphase and in‐phase oxygen octahedral tilt, respectively. Reproduced with permission 69 . Copyright 2022, Elsevier.…”

Section: High‐entropy Ceramics With High Piezoelectric Propertiesmentioning

confidence: 99%

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High‐performance ferroelectric based materials via high‐entropy strategy: Design, properties, and mechanism

Zhang,

Chen,

Liu

et al. 2023

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High‐performance ferroelectric materials are widely used in various electronic devices owing to the function of mutual conversion among different energies, which mainly relates to their special structure gene of polarization configuration. Recent researches show that the high‐entropy strategy has emerged as an effective and flexible approach for boosting physical properties in high‐entropy ferroelectrics via the delicate design of local polarization configurations and other intrinsic effects caused by entropy increment, such as entropy stabilization, lattice disorder, inhibition of grain coarsening, improved mechanical properties, cocktail effect, and so on. In this review, the recent research progress about high‐entropy ferroelectrics has been summarized, especially for the directional design of novel local polarization configurations according to the characteristics of different electrical properties such as high piezoelectricity, high‐efficiency energy storage, and large electrostriction, providing a guidance for designing and exploring more novel local polarization configurations in high‐entropy ferroelectrics for generating higher performance.image

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Metal Oxides Based Nanocomposites for Lithium-Sulfur Batteries

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Ayele,

Alemu

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Microstructure and dielectric properties of high-entropy Sr0.9La0.1MeO3 (Me: Zr, Sn, Ti, Hf, Mn, Nb) perovskite ceramics

Cited by 10 publications

References 49 publications

Optimized thermoelectric performance driven by A-site deficient in SrxLa0.1TiO3/Ti composites

Optimized thermoelectric performance driven by A-site deficient in SrxLa0.1TiO3/Ti composites

High‐performance ferroelectric based materials via high‐entropy strategy: Design, properties, and mechanism

Metal Oxides Based Nanocomposites for Lithium-Sulfur Batteries

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