Low loss tunable dielectric BaNd2Ti5O14- (Ba0.5Sr0.5)TiO3 composite thick films

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abstract

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.

keywords

BARIUM-STRONTIUM-TITANATE; ELECTROPHORETIC DEPOSITION EPD; MICROWAVE APPLICATIONS; CERAMICS; TUNABILITY; CAPACITORS; DEVICES; PHASE; BAO.ND2O3.5TIO2; FILTERS

subject category

Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering

authors

Vilarinho, PM; Fu, Z; Kingon, AI; Tkach, A

our authors

foto Oleksandr Tkach

Oleksandr Tkach

Assistant Researcher
foto Paula Maria Lousada Silveirinha Vilarinho

Paula Maria Lousada Silveirinha Vilarinho

Vice Director

Groups

G2 - Photonic, Electronic and Magnetic Materials

Projects

Centre for Research in Ceramics and Composite Materials - CICECO (LA0011: 2013-2014) (PEst-C/CTM/LA0011/2013)

acknowledgements

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.

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Publication Details

type
Journal Article
year
2018
journal
SCRIPTA MATERIALIA
volume
155
publisher
PERGAMON-ELSEVIER SCIENCE LTD
issn
1359-6462
digital object identifier
10.1016/j.scriptamat.2018.06.032
web of science article identifier
WOS:000440958000033

Journal Metrics (JCR 2019)

Journal Impact Factor
5.079
Journal Impact Factor (5 yrs)
5.044
category normalized journal percentile
79.46

Citations

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