The role of structural point defects in the type formation of electret state in perovskite-type oxides

Lisitsina, S. O.; Panchenko, E. M.; Raevski, I. P.; Trusov, Yu. A.; Fesenko, E. G.

doi:10.1016/0304-3886(90)90016-o

Cited by 4 publications

(2 citation statements)

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“…This dependence saturates when E values exceed 2 kV cm −1 showing that we have reached the maximal degree of poling. The obtained value of P r ≈ 8.5 μC cm −2 is sufficiently lower than the best values of P r ≈ 25–30 μC cm −2 reported for NaNbO 3 ceramics . However, there are many works where much smaller P r values ≈3–8 μC cm −2 were obtained for NaNbO 3 ceramics by studying either P ( E ) loops or by integrating the TSC curve .…”

Section: Resultsmentioning

confidence: 52%

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Dielectric and Pyroelectric Properties of Sodium Niobate Ceramics Containing Inclusions of Ferroelectric Q Phase

Raevskaya

Malitskaya

Chou

et al. 2019

Physica Status Solidi (a)

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For sodium niobate (NaNbO 3 ) ceramics containing in the nonpoled state about 30% of the ferroelectric Q phase, the temperature dependences of the dielectric constant ε and pyroelectric coefficient p are studied. The results obtained show that the transition from the Q phase into the high-temperature nonpolar phase seems to be a diffuse one and the remanent polarization remains nonzero up to %370 C, i.e., well above the temperature of the p(T ) maximum (%270 C). Poled NaNbO 3 ceramics possess high figures of merit for pyroelectric sensors and NaNbO 3 -based materials are prospective for application in the noncooled infrared detectors.

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Section: Resultsmentioning

confidence: 52%

“…The origin of such behavior may be a destruction of the electret charge (it includes both positive and negative components, i.e., homo‐ and hetero‐ ones) created in the course of poling. This charge is known to be rather unstable in the NaNbO 3 ‐based ceramics …”

Section: Resultsmentioning

confidence: 99%