Abstract Nd0.5Ba0.5Mn0.5Fe0.5O3−δ (NBMF55) adopts a cubic perovskite structure in the temperature range of 25–1000 °C in air. The oxygen deficit in NBMF55, equal to 0.14 at room temperature (RT), noticeably increased… Click to show full abstract
Abstract Nd0.5Ba0.5Mn0.5Fe0.5O3−δ (NBMF55) adopts a cubic perovskite structure in the temperature range of 25–1000 °C in air. The oxygen deficit in NBMF55, equal to 0.14 at room temperature (RT), noticeably increased with temperature due to oxygen release at T > 330 °C. The sample exhibits a moderate value of linear thermal expansion coefficient (LTEC), 14.4 × 10−6 K−1, within 25–800 °C. Total conductivity in NBMF55 increased with temperature yielding 25 S/cm at 1000 °C in air. The conduction was thermally activated with the activation energy of 0.33 eV suggesting a hopping mechanism. The impedance measurements for a symmetrical cell based on the Ce0.8Sm0.2O2−δ (SDC) electrolyte material revealed the area-specific resistance (ASR) of 2.2 Ω cm2 at 700 °C in air.
Journal Title: Materials Letters
Year Published: 2019
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