Exploring the low temperature fabrication and properties of barium strontium titanate tunable dielectric ceramics

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abstract

Ba1-xSrxTiO3 compounds are widely recognized as leading dielectric materials for tunable electronic applications. To expand their applicability and enable integration with polymers and metals, there is a need for low-temperature processing. Here we show that Cold Sintering Process (CSP) enables the fabrication of Ba0.6Sr0.4TiO3 (BST) tunable dielectric ceramics, using Ba(OH)(2)8 H2O as a flux, at a temperature as low as 350 degrees C. A dielectric permittivity with a low magnitude of similar to 340 at 10 kHz, an electric-field tunability of 11%, and a thermal stability of +/- 7.1% over the temperature range of -90 degrees C to 85 degrees C are obtained for CSP BST that thus outperforms conventionally sintered BST ceramics. Significant decrease in the sintering temperature and enhanced dielectric performance respond to the current sustainability concerns related to energy efficiency and tunable device requirements.

keywords

COLD SINTERING PROCESS; GRAIN-SIZE; DENSIFICATION; MECHANISMS

subject category

Materials Science

authors

Ribeiro, C; Tkach, A; Costa, ME; Vilarinho, PM

our authors

foto Maria Elisabete Jorge Vieira Costa

Maria Elisabete Jorge Vieira Costa

Collaborator
foto Oleksandr Tkach

Oleksandr Tkach

Principal Researcher
foto Paula Maria Lousada Silveirinha Vilarinho

Paula Maria Lousada Silveirinha Vilarinho

Vice Director

Groups

G2 - Photonic, Electronic and Magnetic Materials

Projects

CICECO - Aveiro Institute of Materials (UIDB/50011/2020)

CICECO - Aveiro Institute of Materials (UIDP/50011/2020)

Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)

acknowledgements

This work was developed within the scope of the project CICECO- Aveiro Institute of Materials, UIDB/50011/2020 (DOI 10.54499/UIDB/50011/2020) , UIDP/50011/2020 (DOI 10.54499/UIDP/50011/2020) & LA/P/0006/2020 (DOI 10.54499/LA/P/0006/2020) , financed by national funds through the FCT/MCTES (PIDDAC) . Camila Ribeiro acknowledges FCT for the Ph.D. grant (2020.09855.BD) support. Alexander Tkach acknowledges FCT for financial support under independent researcher grant 2021.02284.CEECIND/CP1659/CT0018 (DOI 10.54499/2021.02284.CEECIND/CP1659/CT0018) .

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Publication Details

type
Journal Article
year
2024
journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
volume
44
publisher
ELSEVIER SCI LTD
issn
0955-2219
isbn
1873-619X
issue
8
digital object identifier
10.1016/j.jeurceramsoc.2024.02.041
link
hybrid
web of science article identifier
WOS:001225737300001

Journal Metrics (JCR 2019)

Journal Impact Factor
4.495
Journal Impact Factor (5 yrs)
4.283
category normalized journal percentile
98.214

Citations

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