Increasing Electrical Resistivity of P-Type BiFeO Ceramics by Hydrogen Peroxide-Assisted Hydrothermal Synthesis.

Bismuth ferrite (BiFeO, BFO) is still widely investigated both because of the great diversity of its possible applications and from the perspective of intrinsic defect engineering in the perovskite structure. Defect control in BiFeO semiconductors could provide a key technology for overcoming undesirable limitations, namely, a strong leakage current, which is attributed to the presence of oxygen vacancies () and Bi vacancies (). Our study proposes a hydrothermal method for the reduction of the concentration of during the ceramic synthesis of BiFeO.

Elaboration of New Materials Using Hydrothermal Methods.

"Elaboration of New Materials Using Hydrothermal Methods" is a new and open Special Issue of , which aims to publish original research and review papers on that present state-of-the-art advances in the research on the hydrothermal synthesis of new materials [...

The Effect of BiO and FeO Impurity Phases in BiFeO Perovskite Materials on Some Electrical Properties in the Low-Frequency Field.

Pure bismuth ferrite (BFO) and BFO with impurity phases (BiO or FeO) were synthesized by the hydrothermal method. Complex dielectric permittivity (ε) and electrical conductivity (σ) were determined by complex impedance measurements at different frequencies (200 Hz-2 MHz) and temperatures (25-290) °C. The conductivity spectrum of samples, σ(f), complies with Jonscher's universal law and the presence of impurity phases leads to a decrease in the static conductivity (σ); this result is correlated with the increased thermal activation energy of the conduction in impure samples compared to the pure BFO sample.