Electric field-assisted flash sintering of Bi2/3Cu3Ti4O12 starting from a multiphase precursor powder. JESUS, L. M.; SILVA, R. S.; RAJ, R.; M'PEKO, Jean Claude.
Abstract: We show that powders of bismuth titanate, copper oxide, and titanium oxide can be transformed into a single Bi2/3Cu3Ti4O12 phase and subsequently flash sintered at furnace temperatures of 855-910?°C in a single running experiment, with an electric field ranging from 5 to 15?V cm-1 and a current limit of 53?mA mm-2. The (di)electrical properties of the flashed materials were assessed by impedance spectroscopy. These ceramics show a giant dielectric constant (e' > 104), and an increasing resistivity with raising the field used in the flash, reaching a value as high as 6.7?MO?cm for 15?V cm-1. Thus, the one-step experiment process described here greatly simplifies the fabrication of high-density single-phase ceramics of this material while at the same time improving its properties for low leakage high dielectric applications.
Journal of the European Ceramic Society
v. 40, n. 12, p. 4004-4009 + supplementary material - Ano: 2020
Fator de Impacto: 4,029
@article={002998627,author = {JESUS, L. M.; SILVA, R. S.; RAJ, R.; M'PEKO, Jean Claude.},title={Electric field-assisted flash sintering of Bi2/3Cu3Ti4O12 starting from a multiphase precursor powder},journal={Journal of the European Ceramic Society},note={v. 40, n. 12, p. 4004-4009 + supplementary material},year={2020}}
Abstract: We show that powders of bismuth titanate, copper oxide, and titanium oxide can be transformed into a single Bi2/3Cu3Ti4O12 phase and subsequently flash sintered at furnace temperatures of 855-910?°C in a single running experiment, with an electric field ranging from 5 to 15?V cm-1 and a current limit of 53?mA mm-2. The (di)electrical properties of the flashed materials were assessed by impedance spectroscopy. These ceramics show a giant dielectric constant (e' > 104), and an increasing resistivity with raising the field used in the flash, reaching a value as high as 6.7?MO?cm for 15?V cm-1. Thus, the one-step experiment process described here greatly simplifies the fabrication of high-density single-phase ceramics of this material while at the same time improving its properties for low leakage high dielectric applications.
@article={002998627,author = {JESUS, L. M.; SILVA, R. S.; RAJ, R.; M'PEKO, Jean Claude.},title={Electric field-assisted flash sintering of Bi2/3Cu3Ti4O12 starting from a multiphase precursor powder},journal={Journal of the European Ceramic Society},note={v. 40, n. 12, p. 4004-4009 + supplementary material},year={2020}}