Akademik Veri Yönetim Sistemi
2 nd International Karatekin Science and Technology Conference, Çankırı, Türkiye, 21 - 22 Aralık 2023, ss.132
In this investigation, we conducted the synthesis and magnetic analysis of stabilized systems comprising Bi2O3–
solid electrolyte, with a specific focus on their suitability for Intermediate-Temperature Solid Oxide Fuel Cells
(IT–SOFCs). The face-centered cubic structure inherent to pure Bi2O3 crystals is recognized for its distinctive
oxygen ion conductivity. Nevertheless, the super-ion conductor phase within this structure is known to have
limited stability within a narrow temperature range, necessitating stabilization for consideration in SOFC
applications. For the stability assessment, dopants such as Ce–Ho–Tb rare earth elements were incorporated, and
all formulations were synthesized through solid-state reactions conducted at room temperature. To achieve
optimal phase stability, the resulting samples underwent annealing at 750 °C for a duration of 100 hours.
Magnetic properties of the annealed samples were investigated by Vibrating Sample Magnetometer (VSM)
module of the physical properties measurement system (PPMS-Quantum Design). Magnetization vs. temperature
(M-T) assessments were conducted across a temperature spectrum of 10-310 K under a 500 Oe applied field.
Additionally, magnetic-field-dependent magnetization (M-H) measurements were performed at 10 K and room
temperature (300 K), encompassing an applied magnetic-field range of ±2 T for constant temperature
evaluations. M-T measurement results revealed the paramagnetic nature of all samples. Both the M-T and the MH measurements at low temperature showed that the increasing doping rate of Ce and Tb resulted in increasing
magnetization.