Rok 2025

• Physicochemical properties of La0.5Ba0.5Co1-xFexO3-δ (0≤x≤1) as positrode for proton ceramic electrochemical cells

  Publikacja

  • S. L. Wachowski (dawniej: S. Wachowski)
  • I. Szpunar
  • J. Pośpiech
  • D. Balcerzak
  • A. D. Mielewczyk-Gryń (dawniej: A. Mielewczyk-Gryń)
  • M. Nadolska-Dawidowska
  • M. Balaguer
  • J. M. Serra
  • E. Vøllestad
  • M. Gazda... i 2 innych

  - ACTA MATERIALIA - Rok 2025

  We report on essential properties of materials in the series La0.5Ba0.5Co1-xFexO3-δ as positrodes for proton ceramic electrochemical cells (PCECs). The unit cell and thermochemical expansion coefficient (TCEC) of these cubic perovskites decrease with iron content x, the TCEC of La0.5Ba0.5FeO3-δ going as low as 11·10-6 1/K. The materials behave as LaMO3 perovskites with small band gaps and Ba acting as acceptors compensated by electron...

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• Tailoring oxide nanoparticle exsolution in La0.5Ba0.5-yCo1-xFexO3-δ

  Publikacja

  • D. Balcerzak
  • A. López-García
  • A. Carrillo
  • M. Balaguer
  • J. M. Serra
  • T. Norby
  • R. Strandbakke
  • M. Gazda
  • S. L. Wachowski (dawniej: S. Wachowski)

  - JOURNAL OF THE EUROPEAN CERAMIC SOCIETY - Rok 2025

  We show that oxide nanoparticles (NPs) exsolve on La0.5Ba0.5-yCo1-xFexO3-δ (x = 0-1, y = 0 or 0.01) in oxidizing conditions. The phenomenon occurs only in Co-containing materials and depends on pO2 and pH2O pressures. Under dry conditions, the smallest NPs average about 30 nm, with 200-300 NPs/µm2 at pO2=5×10-5 atm. For pO2=1 atm, NP size increases to 100-200 nm, and population drops to a few to about 20 NPs/µm2 depending on A-site...

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Rok 2023

• Oxide nanoparticle exsolution in Lu-doped (Ba,La)CoO3

  Publikacja

  • D. Balcerzak
  • I. Szpunar
  • R. Strandbakke
  • S. Saeed
  • C. Bazioti
  • A. Mielewczyk-Gryń
  • P. Winiarz
  • A. Carrillo
  • M. Balaguer
  • J. Serra... i 2 innych

  - CRYSTENGCOMM - Rok 2023

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• Oxide nanoparticle exsolution in Lu-doped (Ba,La)CoO3

  Publikacja

  • D. Balcerzak
  • I. Szpunar
  • R. Strandbakke
  • S. W. Saeed
  • C. Bazioti
  • A. D. Mielewczyk-Gryń (dawniej: A. Mielewczyk-Gryń)
  • P. Winiarz
  • A. Carrillo
  • M. Balaguer
  • J. M. Serra... i 2 innych

  - CRYSTENGCOMM - Rok 2023

  This study investigated Lu doping of Ba0.5La0.5CoO3 and its influence on the exsolution of oxide nanoparticles (NPs). As a result of Lu doping, we observed the phase segregation into the main Ba0.4La0.6Co0.85Lu0.15O3 (BLCO–Lu) phase and the secondary Ba0.85La0.15Co0.75Lu0.25O3 (BCO–Lu) phase. We noticed the exsolution of BCO–Lu nanoparticles on the main BLCO–Lu phase. Moreover, the BLCO–Lu phase exsolved in the form of nanoparticles...

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Rok 2021

• Microstructural Design of Ba0.5La0.5Co0.5Fe0.5O3 Perovskite Ceramics

  Publikacja

  • D. Balcerzak (dawniej: D. Gierszewska)
  • I. Szpunar
  • F. Oseko
  • J. Pośpiech
  • M. Nadolska-Dawidowska (dawniej: M. Nadolska)
  • M. Pieragowska
  • K. Reniecka
  • K. Waniek
  • K. Leszczyński
  • A. D. Mielewczyk-Gryń (dawniej: A. Mielewczyk-Gryń)... i 2 innych

  - Materials - Rok 2021

  Ba0.5La0.5Co0.5Fe0.5O3 was synthesized in the solid-state reaction route. The influence of ball milling parameters (such as milling media size, angular velocity, and time), pelletizing pressure, and annealing parameters on the microstructure was studied. The grain size distribution and density or specific surface area changes were investigated in each approach while the individual parameters were changed. The evaluation of BLCF...

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