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

authors	Vilarinho, PM; Fu, Z; Kingon, AI; Tkach, A
nationality	International
journal	SCRIPTA MATERIALIA
author keywords	BNT-BST; Composite; Thick-films; Dielectrics; High frequencies
keywords	BARIUM-STRONTIUM-TITANATE; ELECTROPHORETIC DEPOSITION EPD; MICROWAVE APPLICATIONS; CERAMICS; TUNABILITY; CAPACITORS; DEVICES; PHASE; BAO.ND2O3.5TIO2; FILTERS
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.
publisher	PERGAMON-ELSEVIER SCIENCE LTD
issn	1359-6462
year published	2018
volume	155
beginning page	160
ending page	163
digital object identifier (doi)	10.1016/j.scriptamat.2018.06.032
web of science category	Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering
subject category	Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering
unique article identifier	WOS:000440958000033