Sandwich-type composite multilayer films of strontium titanate and barium strontium titanate and their controllable dielectric properties

Effects of thermal misfit strains on dielectric features for sandwich structural barium strontium titanate (BST) thin films on metal plates were investigated via a modified thermodynamic model. When TEC of substrates is closer to that of BST, larger permittivity and tunability can be received. The tendency of permittivities and tunabilities of such films as a function of TEC of substrates agrees with that of single compositional BST films and compositionally graded BST multilayer films. The highest tunability reaches 60% at the biasing field of 300 kV/cm when the films are onto Ti metal. Moreover, Ba[Formula: see text]Sr[Formula: see text]TiO3/Ba[Formula: see text]Sr[Formula: see text]TiO3/Ba[Formula: see text]Sr[Formula: see text]TiO3 structure can obtain higher tunability than Ba[Formula: see text]Sr[Formula: see text]TiO3/Ba[Formula: see text]Sr[Formula: see text]TiO3/Ba[Formula: see text]Sr[Formula: see text]TiO3 structure, while Ba[Formula: see text]Sr[Formula: see text]TiO3/Ba[Formula: see text]Sr[Formula: see text]TiO3/Ba[Formula: see text]Sr[Formula: see text]TiO3 films show better compatible composition range for relatively larger tunability. Dielectric properties of sandwich-like BST films in some references can also be analyzed based on our calculated results.

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Effects of Mechanical Pressures on the Dielectric Properties of Polycrystalline Barium-Strontium Titanate

Journal of the Physical Society of Japan ◽

10.1143/jpsj.6.20 ◽

1951 ◽

Vol 6 (1) ◽

pp. 20-26 ◽

Cited By ~ 39

Author(s):

Gen Shirane ◽

Katsuo Sato

Keyword(s):

Dielectric Properties ◽

Strontium Titanate ◽

Barium Strontium Titanate ◽

Barium Strontium

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Microstructure and Dielectric Properties of Barium Strontium Titanate Thick Films and Ceramics With a Concrete-Like Structure

Journal of the American Ceramic Society ◽

10.1111/j.1551-2916.2007.01742.x ◽

2007 ◽

Vol 90 (8) ◽

pp. 2333-2339 ◽

Cited By ~ 21

Author(s):

Hongfang Zhang ◽

Xi Yao ◽

Liangying Zhang

Keyword(s):

Dielectric Properties ◽

Strontium Titanate ◽

Barium Strontium Titanate ◽

Thick Films ◽

Barium Strontium

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Synthesis and characterizations of metal ions doped barium strontium titanate (BST) nanomaterials for photocatalytic and electrical applications: A mini review

International Journal of Materials Research (formerly Zeitschrift fuer Metallkunde) ◽

10.1515/ijmr-2020-8149 ◽

2021 ◽

Vol 112 (8) ◽

pp. 665-677

Author(s):

Kiflom Gebremedhn Kelele ◽

Aschalew Tadesse ◽

Tegene Desalegn ◽

Suresh Ghotekar ◽

Ruthramurthy Balachandran ◽

...

Keyword(s):

Solid Solution ◽

Dielectric Properties ◽

Barium Titanate ◽

Metal Ions ◽

Strontium Titanate ◽

Barium Strontium Titanate ◽

Metal Ion ◽

Dielectric Characteristics ◽

Characterization Methods ◽

Barium Strontium

Abstract The ferroelectric barium strontium titanate (Ba1-xSrxTiO3) is a homogeneous solid solution prepared from the mixture of barium titanate (BaTiO3), strontium titanate (SrTiO3) and titanium (IV) isopropoxide. Barium strontium titanate (BST) nanomaterials with improved permittivity and dielectric properties due to their nano-properties have attracted great interest for extensive and versatile applications as super capacitors, dielectrics, ceramics and catalysts. Introduction of metal ion dopants into the parent system of BST significantly alters its structural, morphological, electrical, optical and dielectric characteristics. This review is aimed at addressing synthesis, characterization methods, photocatalytic and electrical applications of metal ions doped BST nanomaterials. The effect of doping BST, through metal ions, on its properties and application with most probable reasons have been thoroughly discussed.

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