THE EFFECT OF ELECTRIC CHARGE ACCUMULATION IN A ZRO₂ -BASED NANOPOWDER SYSTEM

This study presents a methodology for the fabrication and investigation of the electrical capacitance properties of zirconium dioxide (ZrO2)-based nanopowders doped with 3 mol.% yttrium oxide (Y2O3). The main focus is on the creation of dense compacts using high hydrostatic pressure up to 500 MPa, as well as the optimization of the technique for applying electrical contacts to ensure measurement stability. The experimental section describes a setup that enables the recording of discharge characteristics of the samples in a temperature range from 30 to 400 °C. The article provides data on the dependence of capacitance on circuit resistance and applied voltage, as well as the influence of thermal treatment – specifically annealing at 400 °C and 500 °C – on structural and capacitive parameters. It is demonstrated that under optimal conditions – namely, a voltage of 10 V, a resistance of 10 kΩ, and air humidity of 50% – a maximum capacitance of up to 1256.948 µF is achieved. The study also shows that increasing the annealing temperature improves the capacitive properties, which is attributed to changes in the material’s microstructure. The presented results highlight the potential of YSZ nanopowders in developing solid-state nanoionic energy storage devices with high energy density, making them promising candidates for use in energy storage systems and microelectronics.

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