Effects of Ba(Mg1/3Ta2/3)O3 doping on phase structure, optical and electrical properties of (K0.5Na0.5)NbO3 transparent ferroelectric ceramics
This paper takes KNN ceramics as the research object, and introduces the second component of ABO 3 type perovskite structure into it. A series of (1- x )K 0.5 Na 0.5 NbO 3 - x Ba(Mg 1/3 Ta 2/3 )O 3 ( x = 0.02, 0.03, 0.04, 0.05, 0.06, 0.07) (KNN- x BMT) nanostructured ferroelectric transparent ceram...
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Veröffentlicht in: | Journal of materials science. Materials in electronics 2022-10, Vol.33 (28), p.22400-22409 |
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Hauptverfasser: | , , , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
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Zusammenfassung: | This paper takes KNN ceramics as the research object, and introduces the second component of ABO
3
type perovskite structure into it. A series of (1-
x
)K
0.5
Na
0.5
NbO
3
-
x
Ba(Mg
1/3
Ta
2/3
)O
3
(
x
= 0.02, 0.03, 0.04, 0.05, 0.06, 0.07) (KNN-
x
BMT) nanostructured ferroelectric transparent ceramics were successfully synthesized by solid-phase reaction. The effects of BMT on the optical permeability, phase transition, microstructure and electrical properties of KNN ceramics were systematically studied. It is found that when the BMT content
x
= 0.05, the transmittance of the ceramic at 1100 nm wavelength reached 68%, and ceramic has the smallest grain size and a concentrated grain size distribution range. Compared with pure KNN ceramics, these nanostructured ceramics have better optical transmittance. The formation of pseudo-cubic phase in ceramics at
x
≥ 0.04 promotes the enhanced relaxation of ceramics, and the hysteresis loop becomes elongated. The maximum polarization (
P
m
) of the ceramics is reduced, and the energy storage efficiency (
η
) reaches a maximum of 65%. When the BMT content
x
is over 0.04, the two peaks in the dielectric temperature spectrum gradually merged with the increase of BMT content, and the phase transition temperature (
T
m
) shifted to low temperature. This shows that the BMT addition increases the relaxivity of the ceramics. |
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ISSN: | 0957-4522 1573-482X |
DOI: | 10.1007/s10854-022-09017-8 |