Processing effects on the composition and dielectric properties of hydrothermally derived BaxSr(1−x)TiO3 thin films

McCormick, M.; Roeder, Ryan K.; Slamovich, Elliott B.

doi:10.1557/jmr.2001.0166

Cited by 24 publications

(13 citation statements)

References 45 publications

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“…This can be achieved by using Ti metal substrates 13 or a variety of other substrates previously coated with Ti metal 14 or Ti-containing precursor 15 or TiO 2 . 16 In this study we demonstrate that the hydrothermal method can be combined with the self-organized patterning method of anodization to create, on Ti metal substrates, nano-tube-patterned thin films of BaTiO 3a prototypical Ti-containing perovskite ceramic.…”

Section: Introductionmentioning

confidence: 83%

Hydrothermal Synthesis of Thin Films of Barium Titanate Ceramic Nano‐Tubes at 200°C

Padture

Wei

2003

Journal of the American Ceramic Society

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A novel, low‐temperature synthesis method for producing BaTiO3 thin films patterned in the form of nano‐tubes (“honeycomb”) on Ti substrates is reported. In this two‐step method, the Ti substrate is first anodized to produce a surface layer (∼200–300‐nm thickness) of amorphous titanium oxide nano‐tube (∼100‐nm diameter) arrays. In the second step, the anodized substrate is subjected to hydrothermal treatment in aqueous Ba(OH)2, where the nano‐tube arrays serve as templates for their hydrothermal conversion to polycrystalline BaTiO3 nano‐tubes. This opens the possibility of tailoring the nano‐tube arrays and of using various precursor solutions and their combinations in the hydrothermal bath, to produce ordered, patterned thin‐film structures of various Ti‐containing ceramics. These could find use not only in a variety of electronic device applications but also in biomedical applications, where patterned thin films are also desirable.

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Section: Introductionmentioning

confidence: 83%

Hydrothermal Synthesis of Thin Films of Barium Titanate Ceramic Nano‐Tubes at 200°C

Padture

Wei

2003

Journal of the American Ceramic Society

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“…Second, regardless of the initial concentration of Ba or Sr in the solution, Sr was more readily incorporated into BST powders than Ba, the extent varying systematically with the relative concentration of Ba and Sr. Preferred incorporation of Sr in BST is not limited to powders, and has been observed in BST thin films by Kajiyoshi et al 9 and McCormick et al 10 among others. Roeder et al attributed the preferred Sr incorporation to the lower free energy of formation of SrTiO 3 relative to BaTiO 3 .…”

Section: Introductionmentioning

confidence: 83%

Effects of Composition on the Reaction Kinetics of Hydrothermally Derived Barium Strontium Titanate

Karadibhave

Slamovich

2007

Journal of the American Ceramic Society

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Barium strontium titanate (BST, BaxSr1−xTiO3) powders were fabricated by reacting nanocrystalline TiO2 with aqueous alkaline solutions containing Ba and Sr at 80°C. Measurements of reaction kinetics showed that Ba‐rich BST compositions exhibited more rapid reaction rates compared with Sr‐rich BST compositions, and the reaction rate increased monotonically with increasing Ba content. The average particle size also increased with increasing Ba content, with the particle growth rate of BaTiO3 being approximately a factor of 10 greater than SrTiO3. The increase in growth rate from Sr‐rich to Ba‐rich BST corresponded to a morphological transition from 20 to 30 nm cuboidal particles to 80 nm raspberry‐like particles, respectively.

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“…Ba 1-x Sr x TiO 3 (BST) is a well-known ferroelectric material where the transition temperature (T c ) could be reduced nearly from 120°C down to -231°C by varying x between 0 and 1 (McCormick et al 2001). The compounds with x in the vicinity of 0.30 are of special interest owing to its T c = 30°C (&RT) and very high value of dielectric constant (e) in the vicinity of T c in both ferroelectric and paraelectric regions (McCormick et al 2001;Ianculescu et al 2008;Zimmerman et al 2004;Chien et al 1999). BST with x = 0.30, i.e.…”

Section: Introductionmentioning

confidence: 99%

Investigations on nanocrystalline BST-LSMO magnetodielectric composites

et al. 2012

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The paper reports the synthesis of Ba 1-x Sr x TiO 3 (BST) for x = 0.20, 0.25, and 0.30 via hydroxide co-precipitation route to result into the BST nanoparticles of size nearly 50 nm. The La 0.67 Sr 0.33 MnO 3 (LSMO) is also synthesized using co-precipitation route to achieve nanocrystaline particles. Further, the magnetodielectric (MD) composites of BST0.20, BST0.25, and BST0.30 are formed by addition of the LSMO at y = 0.1 and 0.2. The parent BST compositions are analysed for its dielectric properties. The composite LSMO-BST (LBST) is investigated for the variation of dielectric constant and impedance spectra as a function of applied magnetic field for the frequency between 500 Hz to 1 MHz. The observations on MD effect show that the dielectric constant possesses contributions due to magnetic field dependant interfacial polarization and variations due to the induced stress.

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Processing effects on the composition and dielectric properties of hydrothermally derived Ba_xSr_(1−x)TiO₃ thin films

Cited by 24 publications

References 45 publications

Hydrothermal Synthesis of Thin Films of Barium Titanate Ceramic Nano‐Tubes at 200°C

Hydrothermal Synthesis of Thin Films of Barium Titanate Ceramic Nano‐Tubes at 200°C

Effects of Composition on the Reaction Kinetics of Hydrothermally Derived Barium Strontium Titanate

Investigations on nanocrystalline BST-LSMO magnetodielectric composites

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