| Texto completo | |
| Autor(es): |
Jesus, L. M.
;
Silva, R. S.
;
Raj, R.
;
M'peko, J-C
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of the European Ceramic Society; v. 40, n. 12, p. 6-pg., 2020-09-01. |
| Resumo | |
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 degrees 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 (epsilon' > 10(4)), and an increasing resistivity with raising the field used in the flash, reaching a value as high as 6.7 M Omega 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. (AU) | |
| Processo FAPESP: | 18/19370-6 - Processamento Assistido por Campo Elétrico de Eletrocerâmicas: características (micro)estruturais e propriedades dielétricas |
| Beneficiário: | Lilian Menezes de Jesus |
| Modalidade de apoio: | Bolsas no Exterior - Pesquisa |