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https://hdl.handle.net/2115/88899

Origins of high-performance giant dielectric properties in TiO2 co-doped with aliovalent ions via broadband dielectric spectroscopy

英語

Rutile TiO 2

2023-01-01

Elsevier

Results in physics

44

106210

(Zn1/3Ta2/3)xTi1-xO2 ceramics with x = 0.01 (ZnTTO-1 %) and x = 0.1 (ZnTTO-10 %) were prepared by a solid-state reaction method. Remarkably, the ZnTTO-1 % and ZnTTO-10 % ceramics sintered at 1500 degrees C for 2 h showed a high dielectric permittivity of approximately 3.90 x 104 and 6.23 x 104 at 1 kHz with low tan delta values of 0.014 and 0.024, respectively. Furthermore, the ZnTTO-1 % ceramic exhibited good temperature stability with a temperature coefficient of <+/- 15 % in the temperature range of 218-473 K (-55-200 <degrees>C), which meets the requirement of the X9R capacitor application. The dielectric relaxations in the wide temperature range of 15-483 K was attained using broadband dielectric spectroscopy to clarify the sources of the excellent dielectric properties. The best performance was demonstrated in the ZnTTO-1 % ceramic. The electron pin defect dipole mechanism, electron hopping, and interface effects are attributed to the giant dielectric responses.

学術雑誌論文

Version of Record

2211-3797