Emergent physical properties of perovskite-type oxides prepared under high pressure

Ye, Xubin; Wang, Xiao; Liu, Zhehong; Zhou, Bowen; Zhang, Long; Deng, Hongshang; Long, Yao

doi:10.1039/d1dt03551g

Cited by 17 publications

(9 citation statements)

References 70 publications

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“…8,9,14 Several synthetic methods have been reported for preparing perovskites that included sol-gel, Pechini, co-precipitation, chelating complex, and pyrolysis. [15][16][17][18] The perovskites exhibit not only higher adsorption capacity and fast kinetics but also act as suitable adsorbents toward industrial wastewater with high concentration. [10][11][12][13] Moreover, the perovskites contain a larger number of active sites than that of conventional materials.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of a novel perovskite-carbon aerogel hybrid adsorbent with multiple metal-Lewis active sites for the removal of dyes from water: experimental and DFT studies

et al. 2023

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Section: Introductionmentioning

confidence: 99%

Synthesis of a novel perovskite-carbon aerogel hybrid adsorbent with multiple metal-Lewis active sites for the removal of dyes from water: experimental and DFT studies

et al. 2023

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“…Interest in these types of ceramics is due to their high dielectric characteristics, which can ensure the creation of high-precision devices with a low level of dielectric losses, as well as high resistance to external influences, including large temperature fluctuations, mechanical stress, etc. [1][2][3][8][9][10][11][12]. At the same time, among the variety of ferroelectric ceramics, structures of the ABO3 type occupy a special place, where Aare rare-earth or alkali elements, Btransition metal elements.…”

Section: Introductionmentioning

confidence: 99%

STUDY OF THE INFLUENCE OF VARIATIONS IN THE PHASE COMPOSITION ON THE DIELECTRIC PROPERTIES OF FERROELECTRIC CaTiO3 CERAMICS DOPED WITH Y2O3

Zhumatayeva,

Kozlovskiy,

Zdorovets

et al. 2023

jour

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The study of the relationship between the effect of phase composition variation on the dielectric characteristics of ferroelectric ceramics is one of the most important fundamental questions, the answer to which will allow us to determine the potential of using ferroelectrics in microelectronic applications and the creation of alternative energy sources (solid oxide fuel cells). The purpose of this study is to explore the effect of the Y2O3 dopant on the phase formation processes and the properties of the synthesized ferroelectric ceramics of calcium titanate, as well as to establish the connection between the influence of the formation of impurity phases on the change in the dielectric properties of ceramics. According to the data of X-ray phase analysis, it was found that the addition of Y2O3 with a concentration above 0.15 M leads to the formation of an orthorhombic CaY2O4 phase in the ceramic structure, the weight contribution of which increases with the dopant concentration growth. An analysis of the dependence of the specific electrical conductivity (σDC) with varying dopant concentration showed that the maximum value of σDC is achieved at dopant concentrations of 0.05 M, which leads to structural ordering due to the effect of adding yttrium oxide acting as a stabilizer, as well as the formation of impurity donor conductivity in the structure. An analysis of the dependence of the specific electrical conductivity (σDC) from dopant concentration was carried out. It has been established that the maximum value of σDC is achieved at a dopant concentration of 0.05 M. This is explained by structural ordering due to the addition of a stabilizer – yttrium oxide, as well as the formation of impurity donor conductivity in the synthesized sample. At the same time, the established dependences of the change in dielectric characteristics are in good agreement with the change in the phase composition, and an increase in the concentration of charge carriers due to the introduction of a donor impurity in the form of Y3+ leads to the appearance of volume-charge polarization in ceramics.

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“…In recent decades, perovskites and their derivatives have become the focus of considerable research because of their useful properties, such as ferromagnetism, photocatalysis, optoelectronic, and superconductivity [1][2][3][4][5][6]. Intense research has been carried out on ABO 3 -type perovskites subject to high pressure as better understanding of their physical properties is important for practical applications and is of fundamental interest to the condensed matter and physics communities.…”

Section: Introductionmentioning

confidence: 99%

The effects of pressure on the lattice of the rare-earth-based perovskite-type oxides SmAlO₃ and NdAlO₃

et al. 2022

New J. Phys.

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This paper studies the behavior of SmAlO3 and NdAlO3 when they are subject to high pressures. This work is undertaken using angle-dispersive synchrotron X-ray powder diffraction and Raman spectroscopy at pressures up to 24.2 and 39.0 GPa, respectively. It is found that SmAlO3 undergoes an orthorhombic (Pnma) to rhombohedral (R-3c) structure transition at around 10 GPa; this transition is induced by the rotation of the AlO6 octahedra toward that of the ideal perovskite structure when the material is subject to high pressures. The tilting of the AlO6 octahedra also decreases at high pressures in NdAlO3. It is found that NdAlO3 maintains its original rhombohedral structure for pressures of up to 39.0 GPa. The structural changes observed in these compounds help establish the electrical and magnetic properties of RAlO3 (R = Sm or Nd) at high pressures.

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Emergent physical properties of perovskite-type oxides prepared under high pressure

Abstract: Perovskite ABO3 family demonstrates a wide variety of structural evolutions and physical properties and is arguably the most important family of complex oxides. Chemical substitutions of A- and/or B-site and...

Cited by 17 publications

References 70 publications

Synthesis of a novel perovskite-carbon aerogel hybrid adsorbent with multiple metal-Lewis active sites for the removal of dyes from water: experimental and DFT studies

Synthesis of a novel perovskite-carbon aerogel hybrid adsorbent with multiple metal-Lewis active sites for the removal of dyes from water: experimental and DFT studies

STUDY OF THE INFLUENCE OF VARIATIONS IN THE PHASE COMPOSITION ON THE DIELECTRIC PROPERTIES OF FERROELECTRIC CaTiO<sub>3</sub> CERAMICS DOPED WITH Y<sub>2</sub>O<sub>3</sub>

The effects of pressure on the lattice of the rare-earth-based perovskite-type oxides SmAlO₃ and NdAlO₃

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Emergent physical properties of perovskite-type oxides prepared under high pressure

Abstract: Perovskite ABO3 family demonstrates a wide variety of structural evolutions and physical properties and is arguably the most important family of complex oxides. Chemical substitutions of A- and/or B-site and...

Cited by 17 publications

References 70 publications

Synthesis of a novel perovskite-carbon aerogel hybrid adsorbent with multiple metal-Lewis active sites for the removal of dyes from water: experimental and DFT studies

Synthesis of a novel perovskite-carbon aerogel hybrid adsorbent with multiple metal-Lewis active sites for the removal of dyes from water: experimental and DFT studies

STUDY OF THE INFLUENCE OF VARIATIONS IN THE PHASE COMPOSITION ON THE DIELECTRIC PROPERTIES OF FERROELECTRIC CaTiO<sub>3</sub> CERAMICS DOPED WITH Y<sub>2</sub>O<sub>3</sub>

The effects of pressure on the lattice of the rare-earth-based perovskite-type oxides SmAlO3 and NdAlO3

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The effects of pressure on the lattice of the rare-earth-based perovskite-type oxides SmAlO₃ and NdAlO₃