ORCID Profile
0000-0002-6889-2506
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Publisher: Elsevier BV
Date: 04-2023
Publisher: AIP Publishing
Date: 06-2023
DOI: 10.1063/5.0146908
Abstract: 0.6Bi(Mg1/2Ti1/2)O3–0.4Ba0.8Ca0.2(Nb0.125Ti0.875)O3 ceramics with a pseudo-cubic structure and re-entrant dipole glass behavior have been investigated via x-ray diffraction and dielectric permittivity–temperature spectra. It shows excellent dielectric–temperature stability with small variations of dielectric permittivity (±5%, 420–802 K) and dielectric loss tangent (tanδ & 2.5%, 441–647 K) in a wide temperature range. Three dielectric anomalies are observed from 290 to 1050 K. The low-temperature, weakly coupled re-entrant relaxor behavior was described using the Vogel–Fulcher law and the new glass model. The mid- and high-temperature dielectric anomalies are characterized by isothermal impedance and electrical modulus. The activation energy of both dielectric relaxation and conductivity follows the Arrhenius law in the temperature ranges of 633–753 and 833–973 K, respectively. The ultrahigh thermal stability of dielectric permittivity is attributed to the weak coupling of polar clusters, the formation of diffuse phase transition, and the local phase transition of calcium-containing perovskite. The results provide new insights into the defects behavior and the modification way of re-entrant relaxor behavior.
Publisher: Elsevier BV
Date: 04-2023
Publisher: Elsevier BV
Date: 05-2008
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9TC05208A
Abstract: The electrocaloric (EC) effect in ferroelectric/antiferroelectric thin films has been widely investigated due to its potential applications in solid state cooling devices.
Publisher: Elsevier BV
Date: 06-2008
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D0RA10807C
Abstract: Searching for a new approach in environmental remediation in terms of dye degradation is important in industrialized society.
Publisher: Elsevier BV
Date: 06-2019
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2TC03037C
Abstract: The model of relaxation originating from the local structure.
Publisher: Elsevier BV
Date: 04-2007
No related grants have been discovered for Laijun LIU.