resumo
An alternative low cost flexible processing is utilized to fabricate tunable dielectric thick-films with low loss. By using a combination of electrophoretic deposition with chemical solution deposition, 9 mu m-thick BaNd2Ti5O14- Baa(5)Sr(0.5)TiO(3) (BNT-BST) composite films are fabricated with a room-temperature relative permittivity of 287 and a loss tangent of 0.0013 at 1 MHz. Moreover, a dielectric tunability and a figure of merit of 12% and 96 at 33 kV/cm, respectively, are obtained by the incorporation of highly tunable ferroelectric BST in a non tunable BNT matrix, thus fitting the requirements of tunable dielectrics for such agile systems as band pass filters. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
palavras-chave
BARIUM-STRONTIUM-TITANATE; ELECTROPHORETIC DEPOSITION EPD; MICROWAVE APPLICATIONS; CERAMICS; TUNABILITY; CAPACITORS; DEVICES; PHASE; BAO.ND2O3.5TIO2; FILTERS
categoria
Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering
autores
Vilarinho, PM; Fu, Z; Kingon, AI; Tkach, A
nossos autores
Oleksandr Tkach
Investigador Auxiliar
Paula Maria Lousada Silveirinha Vilarinho
Vice-Diretoragradecimentos
This work was funded by FEDER funds via Programa Operacional Factores de Competitividade - COMPETE and National funds via FCT (Fundacao para a Ciencia e Tecnologia) within the Project CICECO - FCOMP-01-0124-FEDER-037271 (FCT PEst-C/CTM/LA0011/2013) as well as within FCT independent researcher grant IF/00602/2013.