resumo
Constrained sintering of BaLa4Ti4O15 (BLT) thick films on flexible platinum foil and on rigid BLT substrate showed enhanced grain growth and anisotropic microstructure development when compared with bulk samples having similar green packing and sintered under the same conditions. The evolution of the microstructural parameters (grain and pore shape, orientation) during densification and their correlation was investigated in films and compared with the morphological evolution in bulk samples. It is then expected that the appropriate choice of substrate will allow designing tailored microstructures of functional thick films with optimized performance. (C) 2013 Elsevier Ltd. All rights reserved.
palavras-chave
MICROWAVE DIELECTRIC-PROPERTIES; MICROSTRUCTURE; CERAMICS; ALUMINA; LAMINATE; GROWTH
categoria
Materials Science
autores
Amaral, L; Jamin, C; Senos, AMR; Vilarinho, PM; Guillon, O
nossos autores
Grupos
2 - nanoestruturas e cerâmicos ferróicos multifuncionais
3 - materiais de carbono, compósitos e revestimentos funcionais
agradecimentos
This work was supported by the Portuguese Foundation for Science and Technology (FCT), under grant no. SFRH/BD/40927/2007 and by the DAAD/GRICES Bilateral Action no. 0811978.