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Microstructures and dielectric properties of novel (La0.2Pr0.2Nd0.2Sm0.2Eu0.2)2Ce2O7 high entropy ceramics
Ist Teil von
Journal of materials science. Materials in electronics, 2021-12, Vol.32 (23), p.27860-27870
Ort / Verlag
New York: Springer US
Erscheinungsjahr
2021
Link zum Volltext
Quelle
SpringerLink
Beschreibungen/Notizen
The novel (La
0.2
Pr
0.2
Nd
0.2
Sm
0.2
Eu
0.2
)
2
Ce
2
O
7
high entropy ceramics were successfully fabricated by solid-state reaction method. The crystal structure, the particle morphology and dielectric properties were studied. The effect of sintering temperatures on the phase structure and dielectric properties of high entropy ceramics was investigated. The results showed that high entropy ceramics had a pure A
2
B
2
O
7
phase of defective fluorite structure at 1300 °C. The dielectric measurements showed that the ceramics possessed decent dielectric stability at high frequency. The (La
0.2
Pr
0.2
Nd
0.2
Sm
0.2
Eu
0.2
)
2
Ce
2
O
7
ceramic samples sintered at 1600 °C have large dielectric properties (the order of dielectric constant is 10
5
–10
6
) under the condition of high temperature and low frequency (about 320,000 at 642 °C, 100 Hz), which may be related to the high entropy effect. The insulation was demonstrated with the Leakage current density between 10
–7
and 10
–6
A/cm
2
, which showed the potential application value in microelectronics field.