Relaxation processes in sodium–lithium niobate porous ceramics

Malyshkina, O. V.; Barabanova, E. V.; Malysheva, N.E.; Kapustkin, A.; Иванова, А. И.

doi:10.1080/00150193.2020.1736923

Cited by 6 publications

(3 citation statements)

References 10 publications

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“…A variety of studies have been shown that the dielectric constant decreased significantly with an increase of porosity, not only for ceramics, but also for ferroelectric polymers and composites. 26,[113][114][115] The sintering temperature can also affect the dielectric constant, where Zeng et al indicated that the dielectric constant increased with an increase of sintering temperature due to the increased density and grain size of the ceramic regions. 21 The domain walls are more mobile in large grains and more dense ceramics, and the dielectric constant increases for materials with a high density and large grains.…”

Section: Dielectric Propertiesmentioning

confidence: 99%

Porous ferroelectric materials for energy technologies: current status and future perspectives

Yan

Xiao

et al. 2021

Energy Environ. Sci.

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Section: Dielectric Propertiesmentioning

confidence: 99%

Porous ferroelectric materials for energy technologies: current status and future perspectives

Yan

Xiao

et al. 2021

Energy Environ. Sci.

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“…The second " anomaly" is a spread in the permittivity values at low frequencies, which has already been mentioned earlier [8,18]. Since such behavior is typical for piezoelectric ceramics, it was explained by the presence of migration polarizationi.e.…”

Section: Resultsmentioning

confidence: 63%

Relaxation processes in the region of structural phase transitions on the example of ceramics based on sodium niobate

Malyshkina

Ali

Malysheva

et al. 2022

Physics of the Solid State

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Comparative studies of the temperature dependences and dispersion of the complex permittivity of sodium niobate and sodium-lithium niobate ceramics have been carried out. It is shown that the structural transition to the R-phase (370oC) of sodium niobate ceramics is a ferroelectric phase transition. For sodium niobate ceramics, the existence of three fundamentally different mechanisms of relaxation processes has been established: classical (Debye type), linear, and relaxation, the existence of which is determined by the structural phase. The addition of 10% lithium niobate to the sodium niobate ceramics not only increases the temperature of the structural phase transition, but also eliminates the mechanisms for the occurrence of relaxation polarization. Keywords: piezoelectric ceramics, lead-free materials, permittivity, relaxation processes.

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“…Вторая " аномалия" -разброс значений диэлектрической проницаемости на низких частотах, о которой мы уже упоминали ранее [8,18]. Поскольку такое поведение свойственно пьезоэлектрическим керамикам, оно объяснялось присутствием миграционной поляризациейт.…”

Section: экспериментальные результатыunclassified

Релаксационные Процессы В Области Структурных Фазовых Переходов На Примере Керамики На Основе Ниобата Натрия

Малышкина¹,

Али²,

Малышева³

et al. 2022

Физика Твердого Тела

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Comparative studies of the temperature dependences and dispersion of the complex permittivity of sodium niobate and sodium-lithium niobate ceramics have been carried out. It is shown that the structural transition to the R phase (370°C) of sodium niobate ceramics is a ferroelectric phase transition. For sodium niobate ceramics, the existence of three fundamentally different mechanisms of relaxation processes has been established: classical (Debye type), linear, and relaxation (elastic ionic), the existence of which is determined by the structural phase. The addition of 10% lithium niobate to the sodium niobate ceramics not only increases the temperature of the structural phase transition, but also eliminates the mechanisms for the occurrence of relaxation polarization.

show abstract

Relaxation processes in sodium–lithium niobate porous ceramics

Cited by 6 publications

References 10 publications

Porous ferroelectric materials for energy technologies: current status and future perspectives

Porous ferroelectric materials for energy technologies: current status and future perspectives

Relaxation processes in the region of structural phase transitions on the example of ceramics based on sodium niobate

Релаксационные Процессы В Области Структурных Фазовых Переходов На Примере Керамики На Основе Ниобата Натрия

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