Thermally stable dielectric properties of 0.5Na0.5Bi0.5TiO3–0.4SrTiO3–0.1BiFeO3 ceramics at high temperature
Source abstract
Abstract
Na0.5Bi0.5TiO3‐based ceramics have been paid great attention as Pb‐free piezoelectric and electrical energy storage materials. Here, adding 10 mol% BiFeO3 in Na0.5Bi0.5TiO3–SrTiO3 binary system, 0.5Na0.5Bi0.5TiO3–0.4SrTiO3–0.1BiFeO3 ceramics were prepared by a conventional solid‐state reaction method. Dielectric measurements reflected a near‐plateau dielectric response at high temperature, e.g., the mid‐dielectric permittivity of 2052 with the variation within ±10% from 57 to 371 °C and within ±15% from 54 to 371 °C for the ceramic sintered at 1100 °C. At a moderate electric field of 70 kV/cm, a capacitor made by the ceramic has an electrical energy storage density of 0.95 J/cm3, while the polarization has yet saturated at the moderate electric field. These results suggest that 0.5Na0.5Bi0.5TiO3–0.4SrTiO3–0.1BiFeO3 ceramic is a promising novel material with thermally stable dielectric permittivity and high electrical energy storage property for applications in high‐temperature electronics.
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Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Multiferroics and related materials · Dielectric properties of ceramics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (45)
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