resumo
Ba(1-x)SrxTiO3 (BST) is a crucial dielectric material in tunable devices for modern wireless communication technologies, owing to high dielectric tunability and low dielectric loss. However, the conventional processing of BST ceramics requires a high sintering temperature of about 1350 degrees C. In this work, we demonstrate the feasibility of using Flash sintering (FS) and corresponding maps to process Ba0.6Sr0.4TiO3 ceramics, resulting in a 350 degrees C decrease in sintering temperature and 7 h reduction in sintering process time. The Flash-sintered BST exhibits a finer grain microstructure, lower dielectric loss, and significantly higher K-factor (figure of merit for tunability) when compared to conventionally sintered BST, unequivocally meeting the application criteria for tunable materials. Our findings highlight the effectiveness of FS as an alternative method for the rapid sintering of BST, while also opening up possibilities for further research into more efficient sintering processes for electroceramics.
palavras-chave
ENERGY-STORAGE PROPERTIES; GRAIN-SIZE; DOPED CERIA; MICROSTRUCTURE; DENSIFICATION; CONDUCTIVITY; TEMPERATURE; DEPENDENCE; GRADIENTS; BEHAVIOR
categoria
Materials Science
autores
Ribeiro, C; Tkach, A; Zorro, F; Ferreira, P; Costa, ME; Vilarinho, PM
nossos autores
Maria Elisabete Jorge Vieira Costa
Colaborador
Oleksandr Tkach
Investigador Principal
Paula Maria Lousada Silveirinha Vilarinho
Vice-DiretorProjectos
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
agradecimentos
Aveiro Institute of Materials, UIDB/50011/2020 (DOI 10.54499/UIDB/50011/2020) UIDP/50011/2020 (DOI 10.54499/UIDP/50011/2020) & LA/P/0006/2020 (DOI 10.54499/LA/P/0006/2020), financed national funds through the FCT/MEC (PIDDAC) . Camila Ribeiro knowledges FCT for the Ph.D. grant (2020.09855.BD) support. Alexander Tkach acknowledges FCT for financial support under independent researcher grant 2021.02284.CEECIND/CP1659/CT0018 (DOI 10.544 99/2021.02284.CEECIND/CP1659/CT0018) .