Year: 2024
Type: article
Abstract: The BaO-Na2O-Nb2O5-WO3-P2O5 glass-ceramics were synthesized using a melt-quenching technique coupled with a controlled crystallization process. It was found that increasing crystallization temperature promoted the increase of ceramic phases precipitated and the average grains size of glass-ceramics, resulting in the increase of the dielectric constant. The large dielectric constant of 315 was achieved for glass crystallized at 1000°C. In addition, a thermally stable dielectric constant was noticed in the temperature range from 25 °C to 250 °C. Low dielectric losses below 0.04 were obtained for all samples. The recoverable energy density (Wrec) was enhanced as the crystallization temperature increased. The sample heated at 1000°C exhibited a high Wrec of 177mJ/cm3 with an energy efficiency of 73.8% under 120 kV/cm. These results suggest that phosphate glasses based on niobate glass-ceramics are a promising material for pulse capacitors.
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
Award: G4937468798
OpenAlex ID: W4412995604